極限ガチャ

The Extreme Gacha is a service that originated from the Oishii Mathematics website and randomly presents five limit calculations from Mathematics III, a high school mathematics course.
Compared to the on-site gacha, the app version has the following features:

1. There are currently 17,998,650 gacha combinations (the web version currently has 3,759,210).
2. Unlimited gacha spins, no time limit.
3. Advanced only switch (press (5) to ensure an advanced level is drawn).
4. Additional information (contains sources and related background information for the questions).
5. Built-in timer (measures up to 100 minutes after spinning the gacha, useful for time attacks).
6. New question identification function (distinguishes between new and previously asked questions).
7. Marking function (tap on questions you answered correctly to mark them).
8. No ads.
9. List of all questions from beginner to advanced (check which questions have been released).
10. Link to the page for Oishii Mathematics Limits, which has been improved for the app (even those who have never studied Mathematics III Limits can start from scratch).
11. Calculation Sheet Function (This is very simple).

First-time users can try out the free web version within Oishii Mathematics by searching "Limit Gacha" on Google.
Please also search for "Limit Gacha" on X (Twitter).