# Gear Ratio Puzzle: Spin Right — Match the turn with real gears

> Match the turn with real gears (iPhone/iPad app by Norimitsu Ito.)

- Source: https://appshunter.io/ios/app/gear-ratio-puzzle-spin-right/id6825800896 (this page in markdown: same URL + `.md`)
- Developer: [Norimitsu Ito](https://appshunter.io/developer/1833775939)
- Category: Games, Education, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 1 MB
- Languages: American English, Japanese
- Released: 2026-10-23
- Data updated: 2026-10-25

## What is Gear Ratio Puzzle?

Place gears so the output turns exactly as asked.

Connect the motor to the output axle and match goals like "clockwise ×2" or "counterclockwise ×1/2". The rules are those of real machines:
• Meshing gears turn opposite ways
• Speed changes by driver teeth ÷ driven teeth
• Double gears on one axle multiply the ratio
• A belt turns the other axle the same way at the same speed
• A gear pushed two ways, or touching a brake, locks everything

Solve with the fewest gears for three stars. Every one of the 120 puzzles is checked by a solver for a solution and its fewest gears.

SIX CHAPTERS
1. Which Way? (free, 20 puzzles)
2. Faster, Slower
3. Double Gears
4. Belts
5. Brakes and Fixed Gears
6. Everything Together

FULL VERSION (one-time in-app purchase)
Chapter 1 is free. The full version adds 100 puzzles in chapters 2 to 6. No subscription, no ads.

ACCESSIBLE
• Hints show the next gear
• Undo and clear
• Playable with VoiceOver: every axle reads its gear and how it turns
• With Reduce Motion on, arrows replace the spinning
• Dark Mode and larger text

PRIVACY
No sign-in. Your progress stays on this iPhone and is never sent anywhere. No ads, no analytics. Works in Airplane Mode (only buying and restoring need the network).

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock All Chapters | $2.99 | one-time |


## Is Gear Ratio Puzzle safe?

Not enough ratings yet to assess Gear Ratio Puzzle.

## Is Gear Ratio Puzzle legit?

Gear Ratio Puzzle: Spin Right appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Gear Ratio Puzzle is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-23

No release notes.

## More apps by Norimitsu Ito

- [出店レジ](https://appshunter.io/ios/app/id6751168550)
- [バイブレータ](https://appshunter.io/ios/app/id6757261164)
- [動画変換(広告無し)](https://appshunter.io/ios/app/id6758035250)
- [未来家計簿（広告なし）](https://appshunter.io/ios/app/id6760652981)
- [NISAシミュレーター（広告無し）](https://appshunter.io/ios/app/nisa/id6766467016)
- [Warranty Note: Manuals & Dates](https://appshunter.io/ios/app/warranty-note-manuals-and-dates/id6823604817)

All apps by Norimitsu Ito: https://appshunter.io/developer/1833775939

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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 2026-10-25.*