app to synch more devices as one with bluetooth -- 3

Hello, I need an app (including the graphic of the app itself) for iPhone and android that can can allow the connection of more than one device at the same time with your phone through bluetooth. The app should permit you to connect your phone with more than one pair of wireless earphones, earphones and a speaker, or two speakers at the same time without the need of a splitter. Let's say that apple has the limit of being only able to output audio to one device at a time ... so currently the only solution to listen to audio on multiple headphones would be to use headphone splitter ... do you think that you ca be able to built an app that can solve this limit? A possible solution would be if the app permits the devices to sync as one, so that for iPhone it would be like connecting to a single device. Thank you,