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.




239+ iOS apps curated and reviewed
The best triangles in geometry apps on iPhone average 4.2★ across 239+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | $1.99 | 5.0★ (1) | No | No | Sep 2026 | |
| 2 | Free | 4.0★ (74) | No | No | Aug 2026 | |
| 3 | Free | 3.6★ (40) | No | Yes | May 2026 | |
| 4 | Free | 4.7★ (11) | No | No | Sep 2026 | |
| 5 | Free | 4.3★ (1.3K) | Yes | Yes | Aug 2026 | |
| 6 | Free | 5.0★ (2) | Yes | No | Sep 2026 | |
| 7 | Free | 4.0★ (2) | No | Yes | Aug 2026 | |
| 8 | Free | 4.7★ (756) | No | Yes | 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 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.


Access geometry theorems, postulates, and corollaries with descriptions and diagrams. Create and share custom slides with a built-in editor, exporting them in various formats. Ideal for students and educators needing a portable reference.


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.


This app provides step-by-step solutions for triangle calculations and angle conversions. It includes practice exercises, a trigonometry formula sheet, and an integrated math keyboard for easy input. Ideal for students and professionals needing to master triangle properties.


Instantly solve geometry problems with an AI scanner and get step-by-step explanations. Master complex concepts, prepare for tests, and improve your grades with this powerful study tool.


This app offers a game-based approach to learning geometry, designed for families. It features over 100 puzzles that help children and adults understand geometric principles and proofs through exploration and discovery. The goal is to make learning geometry fun and intuitive.


Explore geometric shapes with interactive 3D models and augmented reality. Unfold figures into flat shapes, learn definitions, and practice calculations. Designed for students aged 11 and up, it enhances spatial visualization and critical thinking.






This app provides instant, step-by-step solutions to geometry and trigonometry problems by simply taking a photo. It also offers an AI tutor for concept explanations and practice tools for mastering geometry.


Learn geometry with interactive 2D and 3D visualizations. This app offers automatic calculations for area, perimeter, and volume, along with trigonometric values. It's designed for students, teachers, and math enthusiasts to make learning math engaging and accessible.


Master geometry concepts through focused lessons and practice games. This app helps build an intuitive understanding of core principles, preparing users for standardized tests and improving problem-solving skills.


Calculate unknown sides and angles of a triangle with ease. Supports various input combinations, including two angles and one side, two sides and one angle, or three sides.


This offline geometry toolkit provides fast, accurate solutions for homework, studying, and quick checks. It offers tools for angles, triangles, circles, and various shapes, along with coordinate and analytic geometry calculations. Designed for high school students and everyday problem-solving.


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.


Master geometry with an interactive, visual learning tool. Explore concepts on a dynamic canvas, visualize theorems in real-time, and solidify understanding with knowledge checks and practice problems. Offers a comprehensive curriculum for high school and advanced middle school students.


This app assists with geometry calculations for over 50 2D and 3D shapes. Input known values and it automatically computes missing measurements like angles, area, volume, and more. It's a comprehensive tool for trigonometry, triangles, and engineering problems.


This utility app calculates missing sides and angles of a triangle given at least three known measures. It displays the formulas used for learning and supports angle input in degrees or radians, with adjustable decimal precision.