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.






244+ iOS apps curated and reviewed
Finding the right angle calculator right apps can be overwhelming with so many options. We've analyzed 244+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 5.0★ (2) | No | No | May 2026 | |
| 2 | Free | 5.0★ (3) | Yes | Yes | Jul 2026 | |
| 3 | Free | 4.6★ (10K) | Yes | Yes | Aug 2026 | |
| 4 | $0.99 | 4.8★ (10) | No | Yes | Aug 2026 | |
| 5 | Free | 1.8★ (5) | No | No | May 2026 | |
| 6 | Free | 4.0★ (1) | Yes | Yes | May 2026 | |
| 7 | Free | 3.9★ (30) | No | Yes | Jul 2026 | |
| 8 | Free | — | No | No | Jun 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 app calculates key values for right-angled and scalene triangles with high precision. It offers a user-friendly interface, flexible angle units, and includes a reference guide to trigonometric formulas. A subscription unlocks calculation steps and removes ads.

This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.


This app helps users understand and calculate angles and lengths in right-angled triangles. It provides step-by-step workings for each calculation, aiding comprehension of trigonometric ratios and triangle properties. It also calculates the triangle's area with explanations.


This app uses your device's camera to calculate angles of polygons in real-time. Simply point your camera at a shape, and it will display the angles on screen. You can then screenshot these calculations for saving.


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.


This app calculates triangles and segments of circles. It supports various angle input formats and offers solutions for oblique triangles and circle segments with optional add-ons. A right triangle calculator is included for free.




This advanced calculator offers a comprehensive history of your calculations and supports complex functions like fraction manipulation, angle conversions, and equation solving. It also includes specialized tools for engineers and a dice roller.


Calculate slope in angle, percentage, or ratio by inputting two sides of a right triangle. This intuitive and easy-to-use application provides the remaining necessary values.


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


This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.


This app quickly calculates unknown angles and sides of right-angled triangles. It offers a workings view for detailed solutions, scale drawings, and a formula reference. Input angles in various formats and customize decimal precision.


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 app simplifies angle calculations and conversions. It handles degrees, minutes, and seconds (DMS) for applications in construction, surveying, and GPS. Perform conversions, mixed calculations, and track your history.


This educational application assists students in calculating heights by determining angles above the horizontal. It simplifies complex measurements for inaccessible areas.


Learn about angles in mathematics. Explore different angle types, practice estimation, and identify special angles. This app offers interactive tools for visual learning.


Calculate side lengths and angles in right-angled triangles using Pythagorean theorem and trigonometry functions. Learn basic trigonometry concepts. An optional premium version removes ads and unlocks a general triangle calculator.


Easily calculate lengths, angles, and areas of various geometric shapes. Input known values and instantly get precise results for a wide range of 2D and 3D figures. Ideal for students and engineers needing quick geometric computations.


This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.