We need to improve our Android and iOS apps' outbox. Attempts, connectivity, SQLite, offline tray... No mockups required, only technical work. More details are given in the attached file.
A NDA agreement should be signed.
I will not consider automatic bids. Please, include some text in the bid so that I can be sure you have read the project.
The improvements should work with API 19 and above in Android and with iOS 9 and above for iPhone.