Image recognition for products on shelfs in stores

We are looking for an Image recognition technology that can function with our own app for IOS and Android. Our App is used by more than 1,000 reps across our country, mostly in self service stores. Nowadays our reps capture prices, share of shelf and other indicator manually. We intend to boost our app so that we can know the shelf situation on every store, generating a list of out-of-stocks, relocating misplaced items, or replacing incorrect price and promotion tags. It's important for us to find a solution with we are able to constantly train the model ourselves.