This is like asking for a citation for what color the sky is. It's common knowledge and accepted fact. The Android store (Play store? Google store? Idk wtf it's even called anymore) is a complete joke and an embarrassment to app stores everywhere.
Even the design looks like it was whipped together by developers.
PS: The only thing Bitcoin is relevant for is cheap publicity for your startup. Something as ugly and unintuitive as Bitcoin is not going to take off and become "the currency of the internet". Ever.
Even the design looks like it was whipped together by developers.