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.






249+ iOS apps curated and reviewed
Triangle Calculator is the household name in right triangle solver, but it's far from the only option. We track 249+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 5.0★ (2) | No | No | May 2026 | ||
| 2 | Free | 4.3★ (78) | No | No | Aug 2026 | ||
| 3 | Free | 3.6★ (40) | No | Yes | May 2026 | ||
| 4 | Free | 4.2★ (30) | No | No | Aug 2026 | ||
| 5 | Free | 4.4★ (5) | No | No | May 2026 | ||
| 6 | Free | 1.0★ (1) | No | Yes | Aug 2026 | ||
| 7 | $12.99 | 2.5★ (2) | No | No | Aug 2026 | ||
| 8 | Free | 4.0★ (1) | Yes | 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.


This application calculates unknown sides and angles of both regular and right triangles. It supports various input combinations, including two sides and an angle, two angles and a side, three sides, or two sides and an angle for right triangles.



This app calculates missing values for both right and irregular triangles. Simply input two known values for a right triangle or three for an irregular one, and it will compute the remaining sides and angles.