RandomTimer-For study and work

You can't concentrate just by setting the timer normally. I'm used to it. I want more gameplay. It is an application that can be recommended for those who have such troubles. With this app, the time to concentrate on work is randomly determined, and if you can concentrate, you will be rewarded, and if you cannot concentrate, the punishment game will be randomly determined, so you will be thrilled and thrilled.
--App functions ---
1. Select a randomly selected range of concentration time. (Example: 10 to 30 minutes)
2. Reward settings. (Example: "Watch a movie", "Read a manga", "Play a game for an hour", etc. It is possible not to set a reward.)
3. Punishment game settings. (Example: "Push-ups 20 times", "Smartphone 2 hours prohibited", "Today's sweets prohibited", etc. It is possible not to set a punishment game.)
4. Notify you of the end of the timer.
5. The timer continues even if the app is closed.
---
Students who are about to take the exam. Working people who want to concentrate on their work. I hope I can help everyone who is studying hard to improve my skills.