# Brain Nine — Brain Nine

> Brain Nine (iPhone/iPad app by Tepuy Tech Inc.)

- Source: https://appshunter.io/ios/app/brain-nine/id6791392695 (this page in markdown: same URL + `.md`)
- Developer: [Tepuy Tech Inc](https://appshunter.io/developer/6789389135)
- Category: Games, Entertainment, Board, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 18.2 · 42 MB
- Languages: American English
- Released: 2026-07-29
- Data updated: 2026-10-01
- User reviews in markdown: https://appshunter.io/ios/app/brain-nine/id6791392695/reviews.md

## What is Brain Nine?

Brain Nine is a clean, minimalist Sudoku for iOS, built to play anytime — online or off.

FOUR DIFFICULTY LEVELS
From Easy to Expert, every board is generated instantly and guarantees a unique solution.

NOTES & AUTO-FILL
Pencil in candidates by hand, or auto-fill every empty cell with a single tap.

SMART HINTS
3 hints per game, always prioritizing the most instructive move. You can also turn on unique-candidate highlighting to sharpen your technique without spending a hint.

UNLIMITED UNDO
Step back as many times as you like while solving a board.

TIMED MODE
Turn it on for an extra challenge: every mistake adds a 30-second penalty, and you can pause anytime — the board hides itself while paused.

STATS & STREAKS
Best time, adjusted time, perfect games, and your current daily streak.

LOCAL LEADERBOARD
Compare your best times per difficulty, all stored right on your own device.

THEME & ACCESSIBILITY
Light, dark, or system theme, plus a palette designed specifically for color blindness.

ENGLISH & SPANISH
The app automatically adapts to your device's language.

PLAY OFFLINE
The game works entirely without an internet connection. No account or sign-in required to play.

Brain Nine includes ads that help keep the app free.


## Version history (last 3 releases)

### 1.2 — 2026-09-11

Fixed a bug where watching a video for an extra hint only worked the first time — you can now do it as many times as you need.

### 1.1 — 2026-09-08

Brain Nine now includes ads to help keep the app free

Everything else you love is exactly the same — same 4 difficulties, same offline gameplay, same stats and leaderboard, all stored on your device.

Thanks for playing!

### 1.0 — 2026-07-29

No release notes.

## More apps by Tepuy Tech Inc

- [Slyde Arrow Puzzle](https://appshunter.io/ios/app/slyde-arrow-puzzle/id6789388880)
- [Maderix](https://appshunter.io/ios/app/maderix/id6790629415)
- [Bloqk](https://appshunter.io/ios/app/bloqk/id6791385811)
- [Lumora Match](https://appshunter.io/ios/app/lumora-match/id6794643467)
- [Snayk: Snake Retro](https://appshunter.io/ios/app/snayk-snake-retro/id6795358861)

All apps by Tepuy Tech Inc: https://appshunter.io/developer/6789389135

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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 2026-10-01.*