# Double Digits: Mental Math — Two-Digit Mental Math Drill

> Two-Digit Mental Math Drill (iPhone/iPad app by shota shimogama.)

- Source: https://appshunter.io/ios/app/double-digits-mental-math/id6796290143 (this page in markdown: same URL + `.md`)
- Developer: [shota shimogama](https://appshunter.io/developer/6796290145)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 28 MB
- Languages: American English, Japanese
- Released: 2026-08-31
- Data updated: 2026-10-11
- User reviews in markdown: https://appshunter.io/ios/app/double-digits-mental-math/id6796290143/reviews.md

## What is Double Digits?

How fast can you solve 7 × 38 in your head?

Double Digits is a drill for people who want to multiply two-digit numbers quickly.

CONQUER EVERY NUMBER FROM 1 TO 99

The home screen is a grid of the numbers 1 to 99. Pick one and you get all 90 combinations of that number with every two-digit number, from 10 to 99. Solve them all and the number is cleared.

Each cleared number keeps your best time. Filling in all 99 is the goal.

WATCH YOURSELF GET FASTER

Take on the same number again and your times are drawn as a line chart. The horizontal axis is your attempt number, the vertical axis is your finishing time. A line sloping downward is progress you can see.

The days you practice are recorded automatically, along with your current streak.

PRACTICE ANY COMBINATION

Want to drill only 7 and 8, and only against the 20s? You can pick exactly which numbers to learn and what to multiply them by, so you can attack your weak spots directly.

INPUT THAT KEEPS UP

The keypad handles multiple fingers at once, so nothing is dropped no matter how fast you type. Correct answers give a light haptic tap and a sound, then move straight on.

COMPETE GLOBALLY

Leaderboards are supported through Game Center, with a separate board for every number. Signing in is optional; decline it and every practice feature still works.

Light and dark appearance are both supported, following your device setting automatically.


## Version history (last 2 releases)

### 1.0.2 — 2026-10-06

Minor improvements.

### 1.0.1 — 2026-08-31

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-11.*