Best Triangle Calculator Apps

216+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated July 2026

From beginner-friendly picks to power-user tools, our triangle calculator list covers 216+ iPhone apps updated through July 2026. Compare ratings, prices, and screenshots in one place.

Compare top Triangle Calculator Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Triangle CalculatorTriangle CalculatorFree5.0★ (2)NoNoMay 2026
2Figure calculator ShapeInfoFigure calculator ShapeInfoFree4.7★ (140)YesNoAug 2026
3Trigonometry Calculator.Trigonometry Calculator.Free5.0★ (3)YesYesJul 2026
4Trig SolverTrig SolverFree4.3★ (78)NoNoAug 2026
5Geometry Calculator liteGeometry Calculator liteFree4.5★ (77)YesYesAug 2026
6Trigonometry Help LiteTrigonometry Help LiteFree4.7★ (768)NoYesAug 2026
7Triangle SolverTriangle SolverFree4.2★ (30)NoNoAug 2026
8Triangle Calculator PythagorasTriangle Calculator PythagorasFree4.0★ (1)YesYesMay 2026

Top Picks for Triangle Calculator

Triangle Calculator#1

Triangle Calculator by Kent Johansson

Right angle triangle solver
Editor's Choice
📊 Productivity
5.0(2 ratings)
Free
Triangle Calculator screenshot 1
Triangle Calculator screenshot 2
Triangle Calculator screenshot 3
Triangle Calculator screenshot 4
Triangle Calculator screenshot 5
Triangle Calculator screenshot 6

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.

Figure calculator ShapeInfo#2

Figure calculator ShapeInfo by Noriyasu Kutsuzawa

Geometric shape calculator
Strong Contender
📊 Productivity
4.7(140 ratings)
FreeAds
Figure calculator ShapeInfo screenshot 1
Figure calculator ShapeInfo screenshot 2
Figure calculator ShapeInfo screenshot 3
Figure calculator ShapeInfo screenshot 4
Figure calculator ShapeInfo screenshot 5
Figure calculator ShapeInfo screenshot 6

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.

Trigonometry Calculator.#3

Trigonometry Calculator. by Horitech

Simple Triangle Calculator
Worth Considering
🔧 Utilities
5.0(3 ratings)
FreeAdsIn-App Purchases
Trigonometry Calculator. screenshot 1
Trigonometry Calculator. screenshot 2
Trigonometry Calculator. screenshot 3
Trigonometry Calculator. screenshot 4
Trigonometry Calculator. screenshot 5
Trigonometry Calculator. screenshot 6

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.

More Triangle Calculator apps to explore

4
Trig Solver
Trig Solver
Trig Solver
by Creature Code Mobile, LLC
Free

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.

Regular triangle solverRight triangle solverCalculate with 2 sides and an angle
🔧 Utilities
(78)
free
5
Geometry Calculator lite
Geometry Calculator lite
Geometry Calculator lite
Circle,Triangle,Cylinder,cube
Free

Calculate key parameters for 26 geometric shapes, including 2D planes and 3D solids. Offers 783 calculations with interactive 3D views for solids. Supports multiple languages and devices.

Calculates parameters for 26 geometric shapesSupports 783 different calculationsInteractive 3D view for solids
📚 Education
(77)
free with in-app purchases
6
Trigonometry Help Lite
Trigonometry Help Lite
Trigonometry Help Lite
Triangle Calculator + Workings
Free

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.

Solve right-angled trianglesView detailed math workingsScale drawing of solved triangle
📚 Education
(768)
free with in-app purchases
7
Triangle Solver
Triangle Solver
Triangle Solver
by William Jockusch
Free

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.

Calculate unknown sidesCalculate unknown anglesTwo angles and one side input
📚 Education
(30)
free
8
Triangle Calculator Pythagoras
Triangle Calculator Pythagoras
Triangle Calculator Pythagoras
Right Triangle Pythagoras
Free

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.

Pythagorean Theorem SolverTrigonometry FunctionsInstant Area and Perimeter Calculation
📚 Education
(1)
free with in-app purchases
9
Construction Calculator
Construction Calculator
Construction Calculator
Carpentry & Stair Trigonometry
Free

This app is a powerful calculator designed for construction and woodworking professionals, as well as students. It simplifies calculations involving feet, inches, and fractions, offering conversions between various measurement units and displaying equations and results simultaneously. Advanced features are available through optional in-app purchases.

Decimal to fraction converterFraction to decimal conversionSimultaneous equation and result display
🔧 Utilities
(625)
free with in-app purchases
10
Triangle Calculators
Triangle Calculators
Triangle Calculators
by V PUGAZHENTHI
Free

This app simplifies triangle calculations with intuitive inputs and clear diagrams. It covers various triangle types and theorems, offering over 125 calculations and supporting multiple units and languages.

125+ triangle calculationsVisual diagramsBuilt-in formulas
📚 Education
(4)
ad-supported
11
Triangle Solver Free - Geometry Calculator
Triangle Solver Free - Geometry Calculator
Triangle Solver Free - Geometry Calculator
by 境 饶
Free

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.

Right triangle solverIrregular triangle solverCalculates missing sides
📊 Productivity
(40)
free
12
Triangle & Angle calculator
Triangle & Angle calculator
Triangle & Angle calculator
Geometry, angle, formulas
Free

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

Solve geometry exercisesCheck calculationsSimple click interface
📚 Education
(209)
free with in-app purchases
13
Triangle Angles Calculator
Triangle Angles Calculator
Triangle Angles Calculator
With convenient visual input
Free

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.

Calculate unknown triangle parameters from 2-3 known valuesInteractive visualization of triangle typesReal-time calculations with intuitive interface
📊 Productivity
(0)
free
14
Gauth: AI Study Companion
Gauth: AI Study Companion
Gauth: AI Study Companion
Step-by-Step Study Guidance
Free

This AI-powered study companion provides instant, accurate answers and step-by-step explanations for all subjects. It offers a live AI tutor with voice and whiteboard capabilities, and can convert notes into quizzes and flashcards. Get help with homework, writing, and calculations from experts 24/7.

AI-powered accurate answers with step-by-step explanationsAI Live Tutor with voice and whiteboardAI Study Converter for quizzes and flashcards
📚 Education
(1.5M)
free with in-app purchases
15
Angle Finder - Trig Calculator
Angle Finder - Trig Calculator
Angle Finder - Trig Calculator
Triangle Calculator
Free

This app simplifies complex geometry and trigonometry calculations. It helps users find angles, side lengths, and areas of various shapes, serving as a portable math assistant for students and professionals.

Triangle solverAngle finderPCD & chord calculator
🔧 Utilities
(4)
free with in-app purchases
16
Right Angle
Right Angle
Right Angle
Triangles, trapezoids, circles
Free

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.

Triangle solverCircle segment calculatorMultiple angle units (degrees, radians, DMS, grade, x/12)
📊 Productivity
(30)
free with in-app purchases
17
Calculator #
Calculator #
Calculator #
Scientific Calculator
Free

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

Math Photos SolverHandwriting RecognitionAI Math Problem Solver
🔧 Utilities
(36K)
free with in-app purchases
18
OmemeTriangle
OmemeTriangle
OmemeTriangle
Trigonometric Calculator
Free

This tool calculates the area, length, and angles of triangles by inputting known side lengths. Developed over five years for a construction company, it offers a simple and user-friendly experience for solving triangle geometry problems.

Calculate triangle areaCalculate triangle lengthCalculate triangle angles
🔧 Utilities
(1)
free
19
Math.Brain: AI Homework Helper
Math.Brain: AI Homework Helper
Math.Brain: AI Homework Helper
Help with Geometry & Algebra
Free

This AI-powered tool simplifies complex subjects like algebra and geometry with step-by-step explanations and instant answers. It adapts to your learning style, offering personalized guidance to help you study smarter and reduce homework stress.

AI-powered explanationsStep-by-step problem solvingInstant answers
📚 Education
(91)
free with in-app purchases
20
Calculator +
Calculator +
Calculator +
Graphing, Percentage, Triangle
Free

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.

Free basic and scientific calculatorIntuitive interface with equation and result displayFraction and percent support
🔧 Utilities
(10K)
free with in-app purchases

FAQ about Triangle Calculator

What are the best triangle calculator apps for iPhone?
Triangle Calculator tops our triangle calculator apps ranking as of July 2026, with a 5.0-star average from 2 App Store ratings, and it's free to download.
Yes — 20 of the top triangle calculator apps we rank are free to download, including Triangle Calculator and Figure calculator ShapeInfo.
Triangle Calculator has no ads and has no in-app purchases, according to its App Store listing as of July 2026.
We track 216+ triangle calculator apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
Triangle Calculator can compute the lengths of sides, angles, area, and perimeter of a right-angle triangle. It provides results with up to approximately 15 significant digits, calculated using 64-bit double precision.
Triangle Calculator is available on iPhone, iPad, and iPod touch devices. It is designed for the iOS ecosystem.