gemuq
Newbie
In addition to very useful ones, there are simply funny ones, as well as applications that surprise with their uselessness. I had an application that counted the number of clicks on the screen. There was only a counter. I don't know who made it and why, but my record was 170 clicks in 12 seconds!
And when it comes to developing serious apps - for health, business, shopping - Computools. But you have to understand that it doesn't cost $ 100 to build a quality app.