i have "tried" many but most dont work..... i have tried to find old versions of apps but they almost always require andrdoid 5+ at least. no, i have not roll

i have "tried" many but most dont work..... i have tried to find old versions of apps but they almost always require andrdoid 5+ at least. no, i have not rolled out own browser because i don't know how... maybe there is a need to build or maintain apps for old devices using old sdks and tools?