# Sudoku: Nine Circles — Boss Fight Logic Puzzles

> Boss Fight Logic Puzzles (iPhone/iPad app by Boilerplate LLC.)

- Source: https://appshunter.io/ios/app/sudoku-nine-circles/id6812558944 (this page in markdown: same URL + `.md`)
- Developer: [Boilerplate LLC](https://appshunter.io/developer/6812554541)
- Category: Games, Action, Puzzle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 16.4 · 112 MB
- Languages: American English
- Released: 2026-11-03
- Data updated: 2026-11-13

## What is Sudoku?

Sudoku with a boss on the board.

Sudoku: Nine Circles is classic 9x9 sudoku with nine bosses in the way. Every puzzle has one solution and solves by logic alone. No guessing, ever. Play free sudoku puzzles from Easy to Genius Mode, a daily sudoku, and lessons in the techniques behind hard sudoku.

STORY MODE: A BOSS ON EVERY GRID
Nine levels. Nine bosses. Each one sits on the grid while you solve it. They erase your notes, occupy cells, scramble digits, deny you a number, arm a cell with a fuse, or chip away at a given until it is gone. Descend nine circles. Clear a level to unlock the next. Earn up to three stars a fight for time, hints and mistakes.

QUICK PLAY: CLASSIC SUDOKU
Pick a difficulty and go straight to a classic grid. No bosses. Eighty-one cells, nine boxes, the digits 1 to 9.

FIVE DIFFICULTIES, BEGINNER TO GENIUS
Easy, Medium, Hard, Expert and Genius Mode. Easy sudoku if you are new to the puzzle, hard and expert sudoku once you are not, and Genius Mode for people who solve for sport. Difficulty is separate from level: any boss at any difficulty.

DAILY SUDOKU
A new sudoku puzzle every day, a streak to keep, and rewards for coming back.

LEARN TO SOLVE
Twenty-three solving techniques, from naked singles and hidden pairs to X-Wing and Swordfish, each shown step by step on the board, with endless practice drills. Advanced techniques come with the Training Pack. Hints name the technique behind the next step, so you learn it instead of just filling a cell. If you want to get better at logic puzzles, this is where you do it.

BUILT TO BE PLAYED BY EVERYONE
Three colorblind palettes, large text that follows your system size, bold text support, high contrast, reduced motion, board coordinates, haptics, full screen-reader labels, and hardware keyboard support.

PLAY ANYWHERE
Fully playable offline. Sign in to keep your progress on all your devices. You never have to.

Free to play, supported by ads. Every level can be finished without paying.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Small tip | $0.99 | one-time |
| Medium tip | $2.99 | one-time |
| Large tip | $4.99 | one-time |
| Big Insight Token Pack | $2.99 | one-time |
| Eureka Coins | $1.99 | one-time |
| Quantum Theme | $1.99 | one-time |
| Relativity Theme | $1.99 | one-time |
| No Ads | $9.99 | one-time |
| Training Pack | $3.99 | one-time |
| Collector's Edition | $14.99 | one-time |


## Is Sudoku safe?

Not enough ratings yet to assess Sudoku.

## Is Sudoku legit?

Sudoku: Nine Circles appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Sudoku is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 3 releases)

### 1.0.2 — 2026-11-13

• Leave the developer a tip from Settings → About. It's optional and buys nothing in the game.
• Small fixes and improvements.

### 1.0.1 — 2026-11-05

Bug fixes and performance improvements

### 1.0.0 — 2026-11-04

No release notes.

## More apps by Boilerplate LLC

- [Where I Stand: Civics](https://appshunter.io/ios/app/where-i-stand-civics/id6812554539)
- [Stormbell: Weather Alerts](https://appshunter.io/ios/app/stormbell-weather-alerts/id6818672539)
- [Boilerplate Tiles](https://appshunter.io/ios/app/boilerplate-tiles/id6825157587)
- [Boilerplate Cards](https://appshunter.io/ios/app/boilerplate-cards/id6829343306)

All apps by Boilerplate LLC: https://appshunter.io/developer/6812554541

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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 2026-11-13.*