3 most strange app on play store

1_ Nothing

this app does have no icon and no name and you open it you will oly have a black screen , the weirdest thing that the app have 50k user
2_ i am not rich

this application is so weird , infact it does have 5k user and it costs 400$ , when you open it you will only see "i am not rich"
3_ Hold on

when you open the app you will only find a button "press me" , the purpose of the app is to calculate how many second you will press the button