# Quadrilateral Calculator — Geometry Solver & Visualizer

> Comprehensive quadrilateral calculator with live visualization and step-by-step solutions. (iPhone/iPad app by Heng Jia Liang.)

- Source: https://appshunter.io/ios/app/quadrilateral-calculator/id1626770065 (this page in markdown: same URL + `.md`)
- Developer: [Heng Jia Liang](https://appshunter.io/developer/1532000635)
- Category: Education, Utilities
- Price: $2.99
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 1 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, Brazilian Portuguese, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan)
- Released: 2022-05-31
- Data updated: 2026-08-14
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/quadrilateral-calculator/id1626770065/reviews.md

## What is Quadrilateral Calculator?

The most complete quadrilateral calculator for students, engineers, architects, and geometry enthusiasts. Solve any quadrilateral instantly - just enter what you know.
Whether you're studying for an exam, designing a space, or solving a geometry problem, Quadrilateral Calculator gives you instant, accurate results with beautiful live visualization.

FOUR FLEXIBLE INPUT MODES
Enter whatever you have - the app figures out the rest:

XY Coordinates  - place 4 points on a canvas and drag them freely
Side Lengths - enter a, b, c, d to get perimeter and area instantly
Diagonals - enter p, q and the angle between them
Angles - enter any 3 angles and the 4th is auto-calculated

COMPLETE CALCULATIONS
Every result you need, computed automatically:
• Perimeter and Area
• Diagonal lengths p and q
• All 4 interior angles α, β, γ, δ
• Side lengths a, b, c, d
• Midpoints and slopes of each side
• Inradius and Circumradius (where applicable)
• Step-by-step solution with formulas

AUTO-IDENTIFIES SHAPE TYPE
The app automatically detects and labels your shape:
Square · Rectangle · Rhombus · Parallelogram · Trapezoid · Kite · Arbitrary Quadrilateral

LIVE INTERACTIVE CANVAS
Drag any vertex to reshape the quadrilateral in real time
Pinch to zoom and pan the canvas
Toggle diagonals, angle arcs, midpoints, and vertex labels
Snap-to-grid for precise positioning
Reset canvas with one tap

UNIT CONVERSION BUILT IN
Switch between cm, m, inches, and feet instantly. All results update automatically.

STEP-BY-STEP SOLUTIONS
See every formula used - great for learning and checking your work. Tap any result to copy it to your clipboard instantly.

RANDOM SHAPE GENERATOR
Generate random quadrilaterals for practice in any input mode. Perfect for students and teachers.

DARK MODE & ALL SCREEN SIZES
Fully supports Dark Mode, iPhone, and iPad. Clean, minimal interface designed for focus.

Perfect for: high school geometry, college math, architecture, engineering, land surveying, carpentry, tile laying, graphic design, and anyone who works with four-sided shapes.

Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

## Key features

- Multiple input modes (coordinates, sides, diagonals, angles)
- Calculates perimeter, area, diagonals, and angles
- Auto-identifies shape type
- Live interactive canvas with drag-and-drop functionality
- Step-by-step solutions with formulas
- Unit conversion built-in
- Random shape generator for practice

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/quadrilateral-calculator/id1626770065/reviews.md

### 1/5 — Calculator is useless and won’t calculate the angles

*2023-12-16*

culator is useless and won’t calculate the angles

## Frequently asked questions about Quadrilateral Calculator

### What quadrilaterals can Quadrilateral Calculator solve?

Quadrilateral Calculator can solve squares, rectangles, rhombuses, parallelograms, trapezoids, kites, and arbitrary quadrilaterals. It automatically identifies the shape type based on the input provided.

### What calculations does Quadrilateral Calculator perform?

It computes perimeter, area, diagonal lengths, all four interior angles, side lengths, midpoints, slopes, and inradius/circumradius where applicable. It also provides step-by-step solutions with formulas.

### Can I input shapes using coordinates in Quadrilateral Calculator?

Yes, Quadrilateral Calculator offers an XY Coordinates input mode where you can place four points on a canvas and drag them freely to define the quadrilateral.

### Does Quadrilateral Calculator support unit conversions?

Yes, Quadrilateral Calculator has built-in unit conversion, allowing you to switch between cm, m, inches, and feet instantly. All results update automatically based on the selected unit.

### Is Quadrilateral Calculator suitable for learning geometry?

Yes, the app is perfect for learning geometry, offering step-by-step solutions with formulas and a random shape generator for practice. It's designed for high school geometry and college math.

### What devices does Quadrilateral Calculator support?

Quadrilateral Calculator fully supports iPhone and iPad devices. It also offers Dark Mode for a comfortable viewing experience.

### How often is Quadrilateral Calculator updated?

The latest version is 1.5, and the app was last updated on April 2, 2026. This indicates a commitment to ongoing development and improvements.

### What is the price of Quadrilateral Calculator?

Quadrilateral Calculator is a paid app priced at $2.99. It does not feature in-app purchases or advertisements.

## Version history (last 3 releases)

### 1.5 — 2026-04-02

- Optimized for the latest devices.
- Fixed minor bugs.
- Improved and redesigned the UI.

### 1.1 — 2026-01-15

- Updated for the newest devices.
- Minor bugs fixed.

### 1.0 — 2022-05-31

No release notes.

## More apps by Heng Jia Liang

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All apps by Heng Jia Liang: https://appshunter.io/developer/1532000635

## Related topics

[quadrilateral calculator](https://appshunter.io/ios/topics/quadrilateral-calculator)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*