Hi there,
I would love to help you with fixing the issues wit your app. These are R&D related issues so its not a quick fix that can be done in a very short time so $ 10- 30 budget is unreal. I can help you am a professional android and iOs coder but this would take more time and thus will cost more. I am 100 % confident that I can do this. Will start immediately and will get the work done as per your specific requirements.
Looking forward to the opportunity to work with you and establishing a long-term working relationship.
Lets discuss this more over chat please.
Thanks,
~ Syed