Php mp3 player playlist jobs

I'm looking to develop a sports betting strategy and need a skilled Data Scientist/Sports Analyst to help me achieve the following goals: - Maximizing win rate - Minimizi...sustainability - Adaptability/ scalability Key Requirements: - Experience with sports data analysis, particularly in soccer, basketball, tennis or Rugby. - Develop predictive models for winning using sports analytics - Proficiency in data science techniques and tools. - Familiarity with various data sources used in sports betting analysis, including historical game statistics, betting odds, and player performance data. - Accuracy and Reliability - Speedy and Realtime Updates Your expertise in developing robust strategies, coupled with a deep understanding of sports data, will be crucial in creating a su...

I'm seeking a proficient, detail-oriented PHP developer to shape an e-commerce website on WooCommerce for my business. The website will need to feature: • A seamless user registration and login mechanism ensuring frivolous sign-ups are at a minimum. • Robust payment gateway integration, making online transactions secure and efficient. • Social media integration enabling connectivity with multiple platforms. A solid background in PHP development, WooCommerce, and e-commerce web development is crucial for this project. Experience with payment gateway integration and social media integrations will also be highly beneficial. The goal is to create a smooth online selling experience for our customers. An ideal freelancer would share my enthusiasm for perfectio...

I'm on the hunt for a creative graphic designer who can create a captivating thumbnail for my YouTube videos. As an eSports player who specializes in multiplayer online battle arenas, it's crucial for my thumbnail to reflect this genre, wherein my photo is highlighted. Key Job Requirements: - Proficiency in graphic design - Understanding of YouTube thumbnail dimensions and guidelines - Familiarity with eSports and particularly, multiplayer online battle arenas - Skilled in Photoshop or any relevant software - Previous experience with eSports related design would be a bonus Your main task will be to design a YouTube thumbnail with these key elements: - My photo: This should be the main focus of the thumbnail Your design should be compelling enough to convince viewers t...

I need a PHP developer to update a single word in my script. Specifically, I want to add the country Montenegro to a pre-existing list, and have it inserted in the middle. The ideal candidate for this task should be proficient in PHP and have a good understanding of basic coding principles. Experience in handling string manipulation within PHP scripts is important, as you'll be required to ensure the country name is inserted accurately and efficiently. Your responsibilities will include: - Identifying the appropriate place to insert the word 'Montenegro' in the PHP script - Making the necessary changes to the script to reflect the updated country list Your bid should reflect the size and scope of this task. Looking forward to your bids!

I am currently in need of an experienced PHP developer for an upcoming project. The specific tasks and objectives have yet to be defined, so I am looking for someone who is adaptable and skilled in all areas of PHP, from front-end development to back-end development and database management. Skills/Experience Required: - Proven experience in front-end and back-end PHP development - Knowledge and experience in database management - Ability to work in different frameworks and technologies such as Laravel, CodeIgniter The qualified candidate should be ready to use different frameworks and technologies as per the project's needs. If you are skilled, adaptable, and up for the challenge, let's get in touch.

I need a skilled Laravel 10 developer to create a 1-page website and mobile. This project demands expertise in Laravel and responsive design for optimal performance across desktop and mobile devices. Note:- Please check figma of layout required below. The key features I require include: - Fast loading - Google page speed check has to be 100% for both desktop and mobile - The page is image heavy, hence has to lazy load images correctly - Menu has drop down images heavy. Accordingly loading should be only on mouse over and not interfere with rest of page load. - First part of the page should

...software will work on both Microsoft and Apple platforms, focusing on tracking and recording baseball data for users of our baseball board (non-computer) game. After our game is played the user will enter in which team won and lost. Then the user will enter the name of each player by team and what he did during the game. For example, Babe Ruth came to bat 5 times, struck out once, walked once, hit 2 homers and 1 single. He had 3 RBIs. Statistics will be retained that will show cumulative data of an ongoing season so once a player is entered into the data base he can then be pulled up for additional record entry for each game he plays. Categories to be tracked for batters are # of at bats, singles, doubles, triples, home runs, RBIs, walks, hit by pitcher, strikeouts, ru...

As the project approaches completion, I am in need of a seasoned PHP developer to perform system enhancements. There's already an existing system at hand that could use your expertise to make it more efficient and user-friendly. The ideal candidate would possess the following skills and experience: - Proficiency in PHP development and database management - Experience in API integration - Strong understanding of the software development life cycle - Proven track record of enhancing existing systems - Detail and solution-oriented mindset Please take note that specific tasks can't be provided at this moment, all we need is to enhance the system. Your rate should reflect this requirement.

Looking for someone who is experienced with Web Audio and to help combine 2 different projects into one. I have a music player that I would like to integrate into the experience.

I need PHP and flutter experts only Bangladeshi. Who help me to reskin this full project. Mobile app and Web.

Necesito descargar una serie de vídeos de una formación que está alojada en Hotmart. Importante destacar que está usando el Hotmart Player, es decir, los videos están alojados directamente en hotmart, no están en Vimeo ni otras similares, lo que dificulta la descarga. He probado bastantes extensiones de google chrome sin éxito, no reconocen el vídeo por lo que estará protegido de alguna manera. No proporcionaré mis credenciales de acceso, por lo que el candidato debe, o tener cuenta en hotmart para hacer sus pruebas, o indicar el proceso en su propuesta y yo lo intentaré y de funcionar le asignaré el premio. Con que el candidato sea capaz de descargar un único vídeo correctamente, el...

I'm in need of a minimalistic yet smart jersey design for our Ultimate Frisbee tournament named "A Day on the Beach". The design should incorporate the colours from our tournament logo. The event is held in London (on volleyball pitches) so where possible, London can be incorporated in the design. Essential elements to be included are: our tournament name, our logo, and player numbers on the back of the jersey. Ideal candidate will have experience in sportswear design and a knack for capturing team spirit visually. Inspiration: The final file will need to be provided in multiple formats (.ai or .psd as well as .png).

I'm seeking a developer with relevant experience in PHP scripting, Google Ads API and Windows OS to provide me with a script that will help with my Google Ads functions. This functionality entails both Keyword Planner integration and a Server-to-Server flow setup. Your tasks will be: • to integrate the Google Keyword Planner into the script, • to set up a server-to-server flow on a Windows operating system, • to ensure compatibility with PHP 8.0. Your understanding of Google Ads API for keyword planning and server interaction flow will be pivotal to this project. Prior experience with these tools will set you apart. Efficiency, accuracy, and an application that runs smoothly are key to the success of this project. Please be prepared to offer examples ...

I need a PHP website developed, with specific functionalities catering to a particular audience. I'm looking for a skilled PHP developer to create a website for me. While the exact purpose of the website is yet to be determined, I'd like it to be versatile and user-friendly. Ideal skills and experience for this project would include: - Proficiency in PHP, HTML, CSS, and JavaScript - Experience in designing and developing user-friendly websites - Ability to create dynamic and interactive web pages - Understanding of various web security issues and how to prevent them While the target audience is not specified yet, the website should be designed with a potential business audience in mind. This means a professional look and feel, and functionalities that mig...

I'm in search of a skilled PHP Laravel developer based in Dhanbad, Jharkhand, for a full-time role. The chosen candidate will be instrumental in the creation of a new website. Key Responsibilities: - Front-end Development: A strong foundation in front-end development is crucial for this role. You need to be able to create intuitive and responsive user interfaces. - Back-end Development: Proficiency in Laravel, a popular PHP framework, is essential to build a robust back-end for the website. - Database Management: Your expertise in managing databases will be pivotal in ensuring the site operates seamlessly. The primary focus of the project is: - Building a new website: You will be responsible for developing a new website from scratch. Your ability to translate design co...

My project requires development of a Set Top Box (STB) emulator for Android. This emulator must include: - IPTV login capabilities -...Encryption for protecting sensitive data Ideal candidates for this role will have experience specifically in STB emulator development for Android, as well as a good understanding of security measures such as two-factor authentication and data encryption. Knowledge in IPTV login capabilities, billing systems, and Stalker portal integration is essential. If you will also submit the link of IPTV player sample that you developed, it will help you to get this project asap. Please remember payment will be only be made after successful project completion. No part payment will be provided until project is completed within agreed timeline. Please bid acc...

I am looking for an experienced developer to help me create a minimalistic PHP web app that can perform a few key actions - user registration, send email notifications and generate reports. Key Requirements: - User Registration: The app should have a simple user registration system. - Email Notifications: It should also be able to send email notifications to users. - Report Generation: The app needs to have the capability to generate reports. I'd like to gauge the freelancers' skills and competence based on their past work, so please include examples of your previous projects in your application. Ideal Skills and Experience: - Strong PHP development skills - Experience in creating user registration systems and handling email notifications - Familiarity with repor...

I'm in need of an experienced PHP developer who can perform a thorough inspection and subsequent modification of my web application. Here is what the project will entail: - **Design Modification:** The application's design needs some tweaking to achieve the desired look and functionality. If you had prior experience with UI/UX, it would be fantastic. - **Functionality Enhancements:** Some parts of the app aren’t functioning the way they should, therefore need some enhancements to improve usability and the overall user experience. Ideal candidates should have a profound understanding of PHP, as the code is written in this language. Prior experience in working with web application optimization, user interface design, and functionality improvements would be be...

...Wordpress theme is no longer supported. The chosen professional should allow for: - Easy customization of the new podcast theme (drag and drop). - Ensuring the new theme is responsive and user-friendly. - Migration of all current assets from the old site (approximately 515 posts), this includes images, show notes, and pretty links from the Pretty Links plugin. - There needs to be a prominent media player on the home page (my podcast host, Libsyn, have bespoke audio players). - I also need a plugin installed for easy back-up of the site In addition, I'd like the previous comments from the old site transferred to the new theme. Lastly, it's important that the new podcast theme has a built-in comment system, contact page and email newsletter sign-up form. Skills and ex...

I'm lo...theme is puzzle, and I expect a 2D cartoon-style graphics quality, with engaging visual elements that align with the genre. - The game should incorporate in-app purchases to enhance player engagement. This feature should be seamlessly integrated and user-friendly. Your role: - Compile the game for android - Implement in-app purchases effectively - Ensure the game meets the necessary quality standards for the app store Ideal Skills: - Proven experience in android game development and deployment - Familiarity with puzzle game mechanics and design - Strong understanding of in-app purchases and how to optimize player engagement - Attention to detail to ensure a smooth deployment process Please include examples of your previous android game development work in you...

...it to both chase and attack the player. Key Points: - The game is in 2D, so experience with Godot's 2D engine is essential. - This project involves integrating a machine learning plugin into a game. - The AI of the slime entity should be at a basic level, with simple and predictable patterns, and should not be too complex. Ideal Freelancer: - Proficient in Godot engine, with experience in 2D game development. - Skilled in machine learning, particularly with reinforcement learning algorithms such as DQN and Actor Critic. - Understanding of game AI, and able to implement AI at a basic level. - Good communication skills is a plus, as I would like to understand the process and logic behind the AI's implementation. Upon a successful defeat of weither the player or ...

I'm looking for a skilled and experienced developer to help update and optimize our existing app for our business. [Removed by Freelancer.com Admin for offsiting - please see Section 13 of our Terms and Conditions] Key Goals: - Optimize the performance of our current app - Maintain its high standard of quality and usability Ideal Skills and Experience: - Proven experience in PHP and/or Android development - Ability to effectively optimize app performance - Understanding of business app requirements and best practices For this project, the primary focus will be on performance enhancement. This will require a diligent and detail-oriented approach to ensure that the app continues to work seamlessly for our customers. The successful candidate will not only have a strong technic...

I have three python codes in my raspberry pi which needs to be executed at the startup (when the pi is booted). one code involve USB camera, another codes is related to playing video via VLC media player and the third code is a counter that sends the data to a cloud. All the codes are working perfectly, they are even working when they are executed simultaneously, but the only thing is that the USB camera code is not working at the startup. If you want me to chat with you, start the bid with "pi" We have tried a lot of methods, but still no success, I believe it is because we are using raspberry pi 5, there are limited resources and libraries for it online. Please help me with this. Thank you.

...enabling it to both chase and attack the player. Key Points: - The game is in 2D, so experience with Godot's 2D engine is essential. - This project involves integrating a machine learning plugin into a game. - The AI of the slime entity should be at a basic level, with simple and predictable patterns, and should not be too complex. Ideal Freelancer: - Proficient in Godot engine, with experience in 2D game development. - Skilled in machine learning, particularly with reinforcement learning algorithms such as DQN and Actor Critic. - Understanding of game AI, and able to implement AI at a basic level. - Good communication skills is a plus, as I would like to understand the process and logic behind the AI's implementation. Upon a successful attack on the player, ...

I'm in need of a highly-skilled professional who specializes in Azure Security Engineering and ForgeRock Training. Key tasks include: - Azure security configuration - Conducting vulnerability assessments - Undertaking threat hunting exercises Additionally, expertise in ForgeRock training covering the following topics will greatly benefi...Access Management (IAM) - Single Sign-On (SSO) - User Provisioning The ideal candidate is required to hold an 'Azure Security Engineer Certification'. This certification will give me confidence in your capabilities to successfully execute the necessary tasks. Your adeptness in handling Azure security coupled with your ability to impart crucial knowledge in ForgeRock makes you an integral team player for my project. I look forwa...

I am seeking a Unity game developer particularly skilled in multiplayer development for a player versus player (PvP) real-time web session game in the Runner genre. Your tasks would include: - Create full game from the beggining. The perfect freelancer for this project should have: - Advanced Unity game development skills (5+ years). - Proven experience specifically in real-time multiplayer game creation (2+ successfull projects). - Session games (execute server per each session [1vs1]) Good reference on what we will build -

...project Create web app based on chatgpt API and custom model . With frontend and backend Requirements : Maybe this explanation more clearly: **Game Objective:** The goal is to create a web-based multiplayer game where each player receives secret tasks from an AI. These tasks must be completed to progress towards a common goal. The game is dynamic, with scenarios and tasks changing based on player actions. **Step-by-Step Process:** 1. **Player Registration and Friend Network:** - Players sign up and add friends within the game to form a network. - Each player is assigned a unique identifier for tracking purposes. 2. **Hidden Scenario Generation:** - At the beginning of each game session, the AI generates a hidden scenario that sets the contex...

I'm looking for a skilled salesperson/assistant with experience in the technology industry. Your primary focus will be closing sales for our business. Key Responsibilities: - Engage in both email and phone calls to reach out to potential customers and close deals - Understand our technology products/services and effectively communicate their value to custome...B2B sales, preferably in the technology sector - Strong understanding of sales strategies and techniques - Excellent communication and interpersonal skills - Ability to work independently and as part of a team - Proficient in email communications and phone sales This project is ideal for a sales professional who is passionate about technology and has a knack for closing deals. You will be a key player in driving our b...

I need a skilled PHP developer to write a script that will interact with an API and retrieve User Information and Product Details. The fetched data should then be displayed in HTML format, enabling users to search through it. Key Requirements: - Fetch User Information and Product Details from an API - Print the fetched details in HTML format - Implement a search function to enable user interaction Ideal Skillset: - Proficiency in PHP - Experience with fetching and handling data from APIs - Strong understanding of HTML and web interface design - Prior experience implementing search functions in web applications Please provide examples of your previous work with APIs and user search functions.

I'm envisioning a basketball arena with a futuristic flair. It should comfortably accommodate a moderate capacity of 5,000-10,000 spectators and various facilities. Key Features: - Player changing rooms - VIP areas for prime viewing - Concession stands for food and beverages - Classrooms for continuous player education - A merchandise kiosk for fan gear - Weight rooms for player fitness - Hall of fame room to honor past brilliance In terms of experience, the ideal candidate will have proficiency in modern architecture design trends, strong understanding on arena functionality and a portfolio of previously completed projects of this scale. Knowledge in sustainable architecture will be advantageous, as I aim to ensure the project's eco-friendliness.

I am seeking an experienced HTML/CSS/JQUERY/PHP developer with at least 4 years of experience to join me on a project. for agency Website/portfolio. Key Skills: - Proficient in HTML and CSS, with experience in responsive design, CSS animations, and the Bootstrap framework. - Strong command of JQUERY and PHP. As part of the application process, I'd like to see: - The number of years you have worked in this field. - Examples of your previous projects showcasing your expertise in the mentioned technologies. Please only apply if you meet these requirements and have a portfolio that demonstrates your proficiency in these areas. Experience is key, so make sure to highlight this in your application. Looking forward to seeing your applications.

I'm seeking a talented designer to create a distinctive and functional outfit for women's competitive tennis. SINGLET AND SKIRT Key Points: - The outfit will consist of a singlet and skirt. The specific fabric for the outfit is yet to be decided. -...visually appealing, suitable for the competitive tennis environment. Requirements: - Strong design skills, particularly in sportswear. - Experience in creating custom clothing for sports. - Knowledge of functional and performance-enhancing fabrics. - A keen eye for fashion and current trends in sportswear. Your task is to develop a unique and high-performing outfit that will help a female tennis player excel in competitive play. The successful design should not only enhance performance but also make a distinct fashion sta...

I need an experienced PHP developer, particularly with Laravel and Symfony expertise. The main task for this project is to fix an issue with mpdf, which is currently generating incorrect PDF output. Key responsibilities: - Identify the root cause of the incorrect PDF output - Implement the necessary fixes to resolve the issue Ideal skills and experience: - Proficient in PHP with specific experience in Laravel and Symfony - Prior experience with mpdf is highly desirable - Ability to troubleshoot and debug efficiently - Strong problem-solving skills - Attention to detail and commitment to producing high-quality work This is a relatively straightforward issue, but I am looking for a developer who can address it promptly and effectively. Please provide examples of similar proj...

Seeking experienced PHP developer to modify our site, to suit our needs. There are several modifations that need done. To qualify: You MUST be ONLY working on our project. If you have other projects going on at the same time then this is not the right fit. We want ONE individual to make changes and NOT an agency. You must be experienced with software by Botble (this one is farmart). It is written with Laravel in plug in format, so you must have experience with this type of code structure and you must write all new code in this format. Once awarded you will be given task. Milestone for the first days tasks will be activated, and payment will be released once the days tasks are live on our site verified to be working. You must complete that task within a timely manner in order to...

I need a PHP script to calculate working hours based on the start and end time. The script should: - Calculate working hours based on the start and end time - Handle only standard working hours - Automatically deduct a fixed break time Ideal skills and experience for this project include: - Strong PHP programming skills - Experience with time and date calculations - Understanding of working hour calculations and break time deductions - Ability to create a clean and efficient script

...project Create web app based on chatgpt API and custom model . With frontend and backend Requirements : Maybe this explanation more clearly: **Game Objective:** The goal is to create a web-based multiplayer game where each player receives secret tasks from an AI. These tasks must be completed to progress towards a common goal. The game is dynamic, with scenarios and tasks changing based on player actions. **Step-by-Step Process:** 1. **Player Registration and Friend Network:** - Players sign up and add friends within the game to form a network. - Each player is assigned a unique identifier for tracking purposes. 2. **Hidden Scenario Generation:** - At the beginning of each game session, the AI generates a hidden scenario that sets the contex...

...project Create web app based on chatgpt API and custom model . With frontend and backend Requirements : Maybe this explanation more clearly: **Game Objective:** The goal is to create a web-based multiplayer game where each player receives secret tasks from an AI. These tasks must be completed to progress towards a common goal. The game is dynamic, with scenarios and tasks changing based on player actions. **Step-by-Step Process:** 1. **Player Registration and Friend Network:** - Players sign up and add friends within the game to form a network. - Each player is assigned a unique identifier for tracking purposes. 2. **Hidden Scenario Generation:** - At the beginning of each game session, the AI generates a hidden scenario that sets the contex...

I'm seeking a proficient PHP Developer, capable of performing specific tasks like PHP scripting without CMS/Framework. The core responsibility will be to parse strings and files, specifically CSV files. The ideal candidate is someone with strong PHP scripting skills, problem-solving attitude, and expertise in CSV file parsing. Your primary goal will be to customize the functionality of my website by automating some repetitive tasks and creating dynamic content. Experience with unstructured data formats like CSV will be critical to your success in this position.

...strong writer with the ability to utilize different tones, styles and approaches. Someone who is well-versed in trends across varying industries Ability to utilize in-depth keyword research, ad grouping and audience targeting. A strong aptitude for digital marketing strategies with a passion for both learning and growing in this area. In order to be considered for this role you must: Be a team player with an analytical mind, creative spirit, and passion for what they do. Be able to meet deadlines and manage work effectively and efficiently. Possess effective and clear communication Be resourceful and efficient -- have the ability to be a self starter. Have a strong attention to detail Be available for a scheduled 30 minute virtual meeting each week to synchronize Be located in...

Note : my budget not more 10$ for whole project Create game based on AI chatbot **Game Objective:** The goal is to create a web-based multiplayer game where each player receives secret tasks from an AI. These tasks must be completed to progress towards a common goal. The game is dynamic, with scenarios and tasks changing based on player actions.

...project entails the creation of background music, character voices, and in-game sound effects. This game is being specially developed for the mobile platform. Key Responsibilities: - Develop and implement engaging background music that complements the gameplay - Create distinctive and suitable voiceovers for a small range of game characters - Design a variety of in-game sounds to heighten the player experience Ideal Skills and Experience: - Prior experience in creating audio for successful mobile games - Proficiency in using audio editing software and game development tools - Strong understanding of how sound complements gameplay - Ability to create high-quality voiceovers for multiple characters - A passion for mobile gaming and a keen ear for sound aesthetics. Please provid...

we have issues with getting dropzone to work on our website that is built with .php. So we just need someone to fix so we can upload files on one page and the files are getting sent to the server.

I'm seeking a proficient Python developer with experience in Flutter for my project's frontend - we're converting audio files into PDF format, with Gujarati language a key aspect. The audio files will be provided in both mp3 and m4a formats, each ranging from 5 minutes to almost 2 hours long. Essential Requirements: - Experience with Google Cloud Platform, our selected cloud service provider for this project. - Ability to handle audio-to-PDF conversion in both mp3 or m4a formats. - Aiding in creating a text-searchable PDF as a result of the conversion process. - Additionally, submit the text to elastic search database to make the text searchable database for future use. (PDF is minimal required and this is an optional requirement) - Google cloud / azure / aw...

I am in need of a talented PHP developer with solid experience in integrating SMTP email with Outlook. The project's main objective is to enhance our mailing system, making it more user-friendly and effective. Key Project Requirements: - Implementing the ability to send email notifications from our system through Outlook. - Enabling tracking of email delivery status, ensuring transparency in our communication process. - Developing a user-friendly way to manage email templates, specifically focusing on basic text formatting like bold or italics. Ideal Skills and Experience: - Proficiency in PHP development. - Prior experience with integrating SMTP email, particularly using Outlook. - Strong understanding of email delivery tracking. - Ability to create a simplistic yet ...

I'm looking for an experienced PHP developer to help me create a dynamic and functional website. While I haven't clarified the project details such as the purpose and design preferences, I would ideally like the following: - User registration and login system - Online payment integration - CMS for easy content management Your experience working on similar projects and with PHP is essential. Please bid if you are confident in your ability to deliver a high-quality, dynamic website meeting these criteria.

I need an experienced PHP developer to help with customizing a PHP script. The specific details of the modifications are: - User Authentication: Implement an effective user authentication system. - Database Integration: Ensure seamless integration with our existing database. - UI/UX Enhancements: Enhance the user interface and user experience of the script. Please note that the specific PHP script has not been disclosed, and further details regarding the script's functionalities have not been provided. The successful freelancer will need to be able to navigate and modify PHP scripts efficiently and have a good understanding of user authentication, database integration, and UI/UX principles. Your expertise in PHP and familiarity with various scrip...

Note : my budget not more 10$ for whole project Create game based on AI chatbot **Game Objective:** The goal is to create a web-based multiplayer game where each player receives secret tasks from an AI. These tasks must be completed to progress towards a common goal. The game is dynamic, with scenarios and tasks changing based on player actions.

Hi Encoder IT Limited, I noticed your profile and would like to offer you my project. We can discuss any details over chat.

Note : my budget not more 10$ for whole project Create game based on AI chatbot **Game Objective:** The goal is to create a web-based multiplayer game where each player receives secret tasks from an AI. These tasks must be completed to progress towards a common goal. The game is dynamic, with scenarios and tasks changing based on player actions.

Tasked with migrating our existing PHP/Apache project files and DB database from our live server to a new vendor server. This positions requires: - Working hands-on with Unix servers - Strong understanding of PHP 7.0, the version currently utilized on our live server - Familiarity with Apache 2.4, the version currently running on our live server - Capable of accurately inputting database credentials - Ensuring the project is fully functional on both web and mobile platforms Ideal candidate will exhibit expertise in server administration, specifically Unix. Familiarity with PHP 7.0 and Apache 2.4 is required. Knowledge of databases, particularly inputting credentials, is appreciated. Experience in ensuring cross-platform functionality on web and mobile applications is...