Euclid Quest
Geometry proofs, zero typing
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Euclid Quest turns classical geometry proofs into a calm, paper-and-ink puzzle game.
No typing, no formulas to memorize upfront: tap the angles, segments and triangles in the figure, pick a theorem, and watch your proof grow line by line until Q.E.D.
HOW IT PLAYS
• Tap elements in the figure, then choose the reason — every step is a real geometric inference
• Equal values carry over automatically and appear right on the figure
• Stuck? A hint can highlight what to select, and the free theorem guide shows a worked example for every rule
WHAT'S INSIDE
• A hand-crafted main journey across 6 chapters: vertical angles, parallel lines, triangles, congruence, circles and more
• Thousands of extra practice puzzles in the puzzle bank, with fresh daily picks
• A gentle tutorial guided by Euclid himself
• Full offline play — proofs work anywhere
• Available in English, 繁體中文, 简体中文, 日本語, 한국어, Español, Français and Deutsch
For working adults who miss the satisfaction of a clean logical argument, students who want geometry to finally click, and anyone who enjoys puzzles with real substance.
Every proof ends the same way: Q.E.D. — and it feels earned.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Brand-new tutorial: Euclid guides you through your first proof, step by step. Various fixes.
The developer, First Mover Tech Co,. Ltd., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- First Mover Tech Co,. Ltd.
- Size
- 22.5 MB
- Category
- Puzzle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Large Shell Pack $4.99
- Medium Shell Pack $2.99
- Unlimited Access $5.99
- Small Shell Pack $0.99
- Copyright
- © 2026 First Mover Tech Co., Ltd.