We corresponded iOS night mode.

【How many quadratic expression can you factor?】

This is an Apps for factorization.

This Apps was made for junior high school students who need to practice factorizations, people in general who like calculations, and middle-aged men who want to stay sharp.

In top page, you can select
Usual factorization,
Time trial of 10 factorizations, and
Reading of time trial ranking.

Explanation Page

Explanation Video(Japanese)

What’s New

Version 1.1.9

We corresponded iOS night mode.

App Privacy

The developer, TOD inc., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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