# SUGAKU - Prime Number Maze — Step on primes to the goal

> Step on primes to the goal (iPhone/iPad app by Fuji Bit Inc..)

- Source: https://appshunter.io/ios/app/sugaku-prime-number-maze/id6761100057 (this page in markdown: same URL + `.md`)
- Developer: [Fuji Bit Inc.](https://appshunter.io/developer/1874205957)
- Category: Games, Education, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 16 MB
- Languages: English, Japanese
- Released: 2026-03-26
- Data updated: 2026-07-04
- User reviews in markdown: https://appshunter.io/ios/app/sugaku-prime-number-maze/id6761100057/reviews.md

## What is SUGAKU?

A maze filled with numbers. Your only path: the prime numbers.
The rules are simple. But can you spot the primes?

■ How to Play
Navigate a grid of numbers from start to goal, stepping only on prime numbers. Hit a composite and it's a miss. Find the shortest route and beat the clock for the best rank.

■ 5 Difficulty Levels
• 5×5 (2–49) — Start here
• 7×7 (2–79) — Sharpen your prime sense
• 10×10 (2–99) — Two-digit challenge
• 15×15 (2–149) — Three-digit primes appear
• 20×20 (2–299) — The ultimate maze

■ Daily Maze
One puzzle a day, the same for everyone. Keep your streak alive.

■ Maze Packs
• Twin Primes — Chase (p, p+2) prime pairs
• Mersenne Numbers — Spot the 2ⁿ-1 traps
• Giant Primes — Face three-digit prime judgment

■ Boss Battles
Every 5 levels, a boss appears. Use your collected primes as weapons — factorize composites to defeat them. Speed judgment battles too.

■ Online Leaderboards
Register a nickname and compete with players worldwide across four leaderboards: by maze size, overall total, run score, and daily maze. Participation is optional and only active after you opt in. Sign in with Apple or Google to carry your scores across devices.

■ Depth & Replayability
• S to D rank scoring
• 32 achievement badges
• 117-prime collection encyclopedia
• Online leaderboards (by size, total, run score, daily)
• Stats & personal best tracking

Sharpen your math instincts while having fun.
Perfect for commutes, study breaks, or anyone who loves numbers.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |
| Twin Primes Pack | $0.99 | one-time |
| Unlock Difficulties | $1.99 | one-time |
| 5 Hints | $0.99 | one-time |
| Mersenne Primes Pack | $0.99 | one-time |
| Giant Primes Pack | $0.99 | one-time |



## Version history (last 5 releases)

### 2.1.1 — 2026-06-14

We have made improvements to the user interface.

### 1.7 — 2026-05-14

We have fixed the bug.

### 1.6 — 2026-04-21

We have fixed the bug.

### 1.5 — 2026-04-03

We have fixed the bug.

### 1.4 — 2026-04-02

We have made minor revisions.

## More apps by Fuji Bit Inc.

- [SUUGAKU](https://appshunter.io/ios/app/suugaku/id6759102221)
- [BUTURAKU](https://appshunter.io/ios/app/buturaku/id6759213255)
- [PAKEDOU](https://appshunter.io/ios/app/pakedou/id6759820254)
- [OKURERUNA！](https://appshunter.io/ios/app/okureruna/id6759956971)
- [HARAKU](https://appshunter.io/ios/app/haraku/id6759958253)
- [KORAKU](https://appshunter.io/ios/app/koraku/id6760215571)

All apps by Fuji Bit Inc.: https://appshunter.io/developer/1874205957

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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 2026-07-04.*