積分ガチャ

The integral lottery is a service launched by the Delicious Mathematics website on May 19, 2021. It randomly presents 5 integral calculation problems from High School Mathematics III. It inherits the functions of the web version and is further enhanced into an app version (supporting iPhones and iPads).

In addition to the functions of the web version, this app version has the following features:
1. The number of questions has increased compared to the web version, and there are currently 134,664,255 lottery combinations (22,113,000 for the web version).
2. It allows unlimited lottery draws without time limits.
3. There is only a high-level switch (which can be set to definitely have high-level questions appear in (5)).
4. It comes with additional information (recording the source and information related to the background of the questions).
5. It has a timer (the lottery draw can be timed up to 100 minutes after the draw, which can be used for time-limited challenges).
6. A new question determination function (which can distinguish whether a question is a new one or a previously appeared one).
7. A marking function (clicking on the questions with correct answers, etc., can be marked).
8. No ads.
9. Question information for lottery draws from elementary to high levels (accompanying a list of questions and answers. Including TeX files of the questions).
10. A link to the Delicious Mathematics integral page optimized for the app (even those who have not studied the integrals of Mathematics III can start learning from the basics).
11. A calculation paper function (using Apple's native PencilKit, there is no delay in taking notes within the app, especially on iPads, where integral calculations can be comfortably carried out).

New users are advised to first search for "integral lottery" on Google and experience the web version within the Delicious Mathematics website for free.

Please also be sure to search for "integral lottery" on X (formerly Twitter).

This is a universal app that can be downloaded and used on iPhones and iPads after a one-time purchase.

The Delicious Mathematics X (formerly Twitter) account @oicmath will release development information and answer questions at any time.

※ Please note that devices that cannot be updated to the latest iOS or iPadOS cannot guarantee normal operation.

※ You can also view the app details through the link to the developer website below this page.