# Triangle Simulator

> Calculates triangle sides, angles, and area with history and memo features. (iPhone/iPad app by Toshiya Hondo.)

- Source: https://appshunter.io/ios/app/triangle-simulator/id1583116107 (this page in markdown: same URL + `.md`)
- Developer: [Toshiya Hondo](https://appshunter.io/developer/1571875732)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 14.0 · 58 MB
- Languages: American English, Japanese
- Released: 2021-09-20
- Data updated: 2026-08-16
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/triangle-simulator/id1583116107/reviews.md

## What is Triangle Simulator?

Simulate triangle.
Get the job done faster.

** Introduction **
This app calculate triangle.
You can check triangle sides, angles and area immediately.
Also you can keep triangle calculate history.
Please check calculation results later.


** Overview **
 - Calculate triangle from sides and angles.
 - You can choose a triangle calculation mode.
 - You can see the image of the actual triangle.
 - You can keep calculation results.
 - You can input memo to calculation results.


** Characteristics **
 - You can input sides and angles easily by triangle calculation mode.
 - You can input side length in square rooted value.
 - You can adjust digits number of result.
 - You can choose angle unit.


** Terms of Use **
https://coconutsdevelop.com/en/terms/terms_of_use.html


** Developer website **
https://coconutsdevelop.com/

## Key features

- Calculate triangle sides, angles, and area
- View triangle image
- Save calculation history
- Add memos to calculations
- Input sides in square rooted values
- Adjust result digit count
- Choose angle units

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Remove Ads (Monthly) | $1.99 | per month |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/triangle-simulator/id1583116107/reviews.md

### 4/5 — Not very user friendly (updated)

*2022-07-23*

[Update. I would like to thank developer Toshiya Hondo for the kind offer of help. Such passion deserves another star. Thankyou]

Despite the efforts of the developer and excellent graphics which adjust to show the resulting shape of the triangle, this app does not work intuitively.

Consulting 'help' only helps a little because some of the descriptive terminology is unclear. For instance, when I tried clicking the grey frame as (I thought?) I was being instructed, nothing happened. Also, I could not find a way to get the app to display decimals in the angles which appear to be being rounded to the nearest degree, despite seeing an example with decimals. I found no way to alter the default setting for increased accuracy.

I feel a lot of potential for this app but it's a shame it does not use a generic triangle, transforming according to minimum input without the need to first make a selection from the top bar and then ensure subsequent instructions are correctly followed.

**Developer response:** Thank you for using my app.
You can change an angle or side by tapping a grey frame.
(A line of the tappable frame is thick.)
Also you can change number digits from "Digits" menu on bottom of triangle.
I will be able to help you.
If you have any questions, please feel free to contact me by email.
You can send me a email from "App Support / Contact" on App Store.

## Frequently asked questions about Triangle Simulator

### What are the main functions of Triangle Simulator?

Triangle Simulator allows you to calculate triangle sides, angles, and area. It also lets you view a visual representation of the triangle and save your calculation history with memos.

### Can I input side lengths with square roots in Triangle Simulator?

Yes, Triangle Simulator supports inputting side lengths in square rooted values, offering flexibility for complex calculations.

### How accurate are the calculations in Triangle Simulator?

You can adjust the number of digits for the results, allowing you to control the precision of your triangle calculations.

### Does Triangle Simulator support different angle units?

Yes, you can choose your preferred angle unit for calculations within Triangle Simulator.

### Is Triangle Simulator available on all devices?

Triangle Simulator is available for iPhone, iPad, and iPod, as indicated by its supported devices.

### How often is Triangle Simulator updated?

The app was last updated on May 11, 2026, indicating a recent update. It was initially released on September 20, 2021.

### Does Triangle Simulator have ads?

Yes, Triangle Simulator contains advertisements. You can remove them with a monthly subscription.

### What is the subscription cost to remove ads?

The subscription plan to remove ads from Triangle Simulator costs $1.99 per month.

## Version history (last 5 releases)

### 2.3.2 — 2026-08-09

* Improve the stability.

### 2.3.1 — 2026-05-11

* Improve the stability.

### 2.3.0 — 2026-05-08

* Improve the stability.

### 2.2.0 — 2026-03-07

* Improve the stability.

### 2.1.5 — 2025-12-06

* Improve the app performance.

## Apps similar to Triangle Simulator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Triangle Angles Calculator](https://appshunter.io/ios/app/triangle-angles-calculator/id1598378708) | — | Free | Productivity |
| [アングル加工](https://appshunter.io/ios/app/id6446820088) | — | Free | Productivity |
| [SSFMfree](https://appshunter.io/ios/app/ssfmfree/id1476228180) | — | Free | Productivity |
| [Right Angle](https://appshunter.io/ios/app/right-angle/id292390648) | 3.9 (30) | Free | Productivity |
| [Trigonometric Calculation](https://appshunter.io/ios/app/trigonometric-calculation/id1636196284) | — | Free | Productivity |
| [Triangle3](https://appshunter.io/ios/app/triangle3/id1643788233) | — | $3.99 | Productivity |

## More apps by Toshiya Hondo

- [Bookmark Folder](https://appshunter.io/ios/app/bookmark-folder/id1571875730)
- [Dev Calc -Developer Calculator](https://appshunter.io/ios/app/dev-calc-developer-calculator/id1576503219)
- [Focus Range](https://appshunter.io/ios/app/focus-range/id1579309326)
- [Handy Leveler](https://appshunter.io/ios/app/handy-leveler/id1586901385)
- [Favo Map](https://appshunter.io/ios/app/favo-map/id1589007227)

All apps by Toshiya Hondo: https://appshunter.io/developer/1571875732

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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 2026-08-16.*