The best way to find good apps is to make sure:

1. The Dev trully uses that app as a daily driver; This means that, for mobile devs, they need to view and post from their phones and not from the desktop. Using the phone's emulator is not good enough.

2. Your hardware + software setup is very close to the dev's. This includes operating system versions, accessories, installed libraries, keyboards, etc.

You would be surprised how many devs never use their own products.