Android app minor changes and fixes

We have a youtube to mp3 converter android app that uses a website for the conversion process, the website does the conversion on a server owned by us, there's a problem with the linking between the website and the app, the website is fully functional and the android app is connected to it but it needs simple fixes, in addition to some simple changes in the app as well, more details in pm for bidders with reasonable budget and experience, we are planning to publish the same app for windows and blackberry, so future work is possible if you provide good service.