# Anzan Sense — Flash mental math trainer

> Flash mental math trainer (iPhone/iPad app by seiji honda.)

- Source: https://appshunter.io/ios/app/anzan-sense/id6772697971 (this page in markdown: same URL + `.md`)
- Developer: [seiji honda](https://appshunter.io/developer/1896430544)
- Category: Games, Education, Casual, Family
- Price: Free with in-app purchases (on sale, was $0.49)
- Age rating: 4+
- Requires: iOS 16.0 · 2 MB
- Languages: Japanese
- Released: 2026-05-26
- Data updated: 2026-08-14
- User reviews in markdown: https://appshunter.io/ios/app/anzan-sense/id6772697971/reviews.md

## What is Anzan Sense?

Numbers flash one at a time and you add them up in your head. A simple but deep flash mental math game. Three modes and flexible settings train your calculation, focus and working memory.

Three modes
- Standard: add the flashing numbers (the basic mode)
- Listen: numbers are not shown, they are spoken aloud. Listen and add
- Dual: two columns flash at once. Enter each total

Settings
- Difficulty: 4 levels (changes the flashing speed)
- Digits: 1-digit / 2-digit / 3-digit
- Numbers per problem: 5 to 20
- Problems per session: 3 to 15

Extras (optional spice)
- Letter noise: hiragana / kanji mix in. Ignore them and add only numbers
- Conditional rules: star doubles your total, diamond triples it, triangle subtracts
- Photo distraction: your own photos flash in briefly (with permission)

Records
Your correct count and accuracy are tracked. Beat your best accuracy per mode and difficulty!

No ads. No in-app purchases. No data collection.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Anzan Sense Premium | $0.49 | one-time |



## Version history (last 5 releases)

### 1.0.5 — 2026-08-13

Improved photo-noise access behavior.
The app no longer shows photo library prompts when launching, and 
photo loading during gameplay has been improved.

### 1.0.4 — 2026-07-19

• Fixed an issue where tapping a locked difficulty or digit count sometimes didn't open the purchase screen. Now tapping anywhere on a locked option opens Premium right away.
• Added guidance when photo access isn't allowed, with a button to open Settings.
• Locked the layout to portrait for a more stable experience.
• Added Stats — see your accuracy trend and your strong/weak spots by difficulty at a glance.
• Added Auto Start — begin at a difficulty matched to your recent results.
• Fixed several small issues with music, sound effects, and purchases.

### 1.0.3 — 2026-06-19

• Added background music and sound effects.
• Sounds for correct/incorrect answers, ticks for flashing numbers and keypad, a fanfare on a new best, plus haptic feedback.
• Toggle Music and Sound Effects separately on the home screen.
• Added Simplified Chinese — switch between Japanese, English and 中文.

### 1.0.2 — 2026-06-15

• Switched from a paid app to free with an in-app purchase.
    Free: Easy to Normal (1-digit)
    Premium: unlocks Normal (2- and 3-digit), Hard, and Extreme
• Added "Restore Purchase" — handy when you change or reinstall your device.
• Minor refinements.

### 1.0.1 — 2026-05-29

Added the first screenshot.

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## More apps by seiji honda

- [Lock2Cam](https://appshunter.io/ios/app/lock2cam/id6767222283)
- [Tilt Hit](https://appshunter.io/ios/app/tilt-hit/id6767581735)
- [Hertz Sense](https://appshunter.io/ios/app/hertz-sense/id6767974523)
- [Causal Loop Diagram](https://appshunter.io/ios/app/causal-loop-diagram/id6769942289)
- [Wash&Shine](https://appshunter.io/ios/app/wash-and-shine/id6769987213)
- [Tippy Brim](https://appshunter.io/ios/app/tippy-brim/id6769992872)

All apps by seiji honda: https://appshunter.io/developer/1896430544

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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 2026-08-14.*