Extensive Mobile App Bug Testing

I am rolling out a new virtual-gifting, short-form video app and want to uncover every glitch before launch. I need the build exercised on as many real devices as you can access—both iOS and Android—so we reveal issues that emulators often hide... (Budget: £250 - £750 GBP, Jobs: Android, iPhone, Mobile App Development, Mobile App Testing, Mobile Development, Regression Testing, Test Automation, Testing / QA, Usability Testing)