ChessLeveler : easy time diff

This is an easy to use chess clock for blitz/rapid games.
The main point is to create a very convenient way to set the time, and possibly to handicap a stronger player in a blitz/rapid game.
It should not be necessary to read any doc, or to search around in the app to get started.
It supports Fischer mode (increment).

Press arrows to set minute, seconds, and increments, and just toggle the button to start the chess clock.
During game times and piece probabilities can now all be changed in paused mode.

If the pure time difference is not enough to get the game level, a random functionality of displaying a "chess piece" is available.
This can be used to force a move of that particular piece type (if legal), skip your turn, give an extra move or whatever meaning is agreed in advance.
Thus the game gets less predictable and can give a big advantage to less experienced players.
The probability for the chess pieces popping up is a number 0-100 in percent for each move.