I've tried and buyed .. I mean bought at least 4 other Mobile development platforms/frameworks on APPSUMO, but there is something really well thought out about this particular APP. It really does a superb job in many ways above and beyond the others of being Uber simple to use, yet feature rich. The PWA is what sold me, but the clean layout and seemingly clean code is what has made me a huge fan, I think I will buy another 5 sites!!