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.






141+ iOS apps & games curated and reviewed
The best triangle right apps and games on iPhone average 4.2★ across 141+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | Free | 5.0★ (2) | No | No | May 2026 | ||
| 2 | Free | 3.8★ (6) | No | Yes | Aug 2026 | ||
| 3 | Free | 4.0★ (1) | Yes | Yes | May 2026 | ||
| 4 | $2.99 | 3.7★ (3) | No | No | Aug 2026 | ||
| 5 | Free | 3.9★ (30) | No | Yes | Jul 2026 | ||
| 6 | Free | 3.6★ (40) | No | Yes | May 2026 | ||
| 7 | Free | — | Yes | No | May 2026 | ||
| 8 | Free | 4.2★ (30) | No | No | Aug 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.






Instantly solve geometry homework and prepare for exams with this free calculator. It provides complete step-by-step solutions for all triangle quantities, including legs, hypotenuse, height, angles, perimeter, and area. Access learning videos and manage your solutions.






This geometry tool simplifies right-angled triangle calculations. It instantly solves for missing sides, angles, area, and perimeter using the Pythagorean theorem and trigonometry. It also displays the formulas used for each calculation, aiding understanding.