Calculate side lengths, angles, area, and perimeter of right-angle triangles. Visualizes the triangle with adjustable precision and offers options to rotate, flip, and customize themes. Reuses previous entries for efficiency.






246+ iOS apps curated and reviewed
Out of 246+ angle calculator triangle apps on iOS, 18 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 5.0★ (2) | No | No | May 2026 | ||
| 2 | Free | 4.0★ (209) | No | Yes | Aug 2026 | ||
| 3 | Free | 5.0★ (1) | No | No | Sep 2026 | ||
| 4 | Free | 4.6★ (10K) | Yes | Yes | Sep 2026 | ||
| 5 | Free was $3.99 | 5.0★ (7) | No | No | Sep 2026 | ||
| 6 | Free | 5.0★ (3) | Yes | Yes | Sep 2026 | ||
| 7 | Free was $1.99 | 3.6★ (5) | No | No | Aug 2026 | ||
| 8 | Free | 3.6★ (40) | No | Yes | May 2026 |






Calculate side lengths, angles, area, and perimeter of right-angle triangles. Visualizes the triangle with adjustable precision and offers options to rotate, flip, and customize themes. Reuses previous entries for efficiency.






Easily solve geometry exercises and verify your calculations with this tool. It simplifies complex problems with a single click, making math more accessible.






Easily calculate unknown sides, angles, and other parameters for various triangle types. Features interactive visualizations and works offline, making it ideal for students and professionals needing quick, accurate geometric solutions.