Learn the fundamentals of triangles, including types, centers, and area calculations. This app explains theorems and postulates with visual aids and includes review quizzes to test understanding.




238+ iOS apps curated and reviewed
The best triangles in geometry apps on iPhone average 4.4★ across 238+ titles — we've ranked them by what real users actually keep on their phones. Updated October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | $1.99 | 5.0★ (1) | No | No | Sep 2026 | ||
| 2 | Free | 4.0★ (75) | No | No | Oct 2026 | ||
| 3 | Free | 4.3★ (1.3K) | Yes | Yes | Oct 2026 | ||
| 4 | Free | 3.6★ (40) | No | Yes | May 2026 | ||
| 5 | Free | 4.7★ (11) | No | No | Sep 2026 | ||
| 6 | Free | 5.0★ (2) | Yes | No | Sep 2026 | ||
| 7 | Free | 4.7★ (768) | No | Yes | Oct 2026 | ||
| 8 | Free | 5.0★ (8) | No | No | Sep 2026 |




Learn the fundamentals of triangles, including types, centers, and area calculations. This app explains theorems and postulates with visual aids and includes review quizzes to test understanding.






Create geometric constructions like triangles, lines, and circles. Explore interactive geometry by dragging elements, measuring lengths and areas, and transforming shapes. Save and share your creations, and discover learning activities.






This app helps with geometry problems using an AI assistant to scan and solve word problems. It offers step-by-step solutions for over 100 geometric shapes, allowing users to calculate area, volume, perimeter, and surface area. Visualize shapes and share solutions easily.