# Tri-func

> Displays triangle formulas and calculated values. (iPhone/iPad app by Thirdware.jp.)

- Source: https://appshunter.io/ios/app/tri-func/id496807268 (this page in markdown: same URL + `.md`)
- Developer: [Thirdware.jp](https://appshunter.io/developer/464228680)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 3 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 4 MB
- Languages: American English
- Released: 2012-02-20
- Data updated: 2026-08-21
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/tri-func/id496807268/reviews.md

## What is Tri?

App to display a formula and value of a triangle.

## Key features

- Triangle formula display
- Value calculation
- Quick access utility
- Mathematical formulas

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/tri-func/id496807268/reviews.md

### 4/5 — Brilliant

*2014-11-21, version 1.0.2*

Great app easy to use for finding angles and measurements, use this on iPhone6 to help survey roofs to find slope length, saves loads of time, if it was available on iPad Air, I would have given it a 5..

### 5/5 — Thanks

*2012-06-30*

Even Pythagorus would be impressed. So simple yet so beautiful. This just made trig functions obsolete.

### 5/5 — Brill

*2012-02-21, version 1.0*

Simple and Brill

## Frequently asked questions about Tri

### What is Tri-func?

Tri-func is a utility app designed to display the formulas and values for triangles. It helps users quickly access mathematical calculations related to triangular shapes.

### Is Tri-func free to use?

Yes, Tri-func is available for free. However, it does contain advertisements.

### What devices does Tri-func support?

Tri-func is supported on iPhone and iPod devices.

### What is the age rating for Tri-func?

Tri-func has an age rating of 4+, making it suitable for a wide range of users.

### How often is Tri-func updated?

The latest version of Tri-func is 1.0.11, and it was last updated on September 29, 2025. This indicates regular maintenance and updates.

### What is the user rating for Tri-func?

Tri-func has an excellent rating of 5.0 stars based on one review, suggesting high user satisfaction.

### Does Tri-func have ads?

Yes, Tri-func contains advertisements as part of its free distribution model.

### When was Tri-func first released?

Tri-func was initially released on February 20, 2012.

## Version history (last 5 releases)

### 1.0.11 — 2025-09-29

- Support for iOS26

### 1.0.10 — 2024-09-16

- Support for iOS18

### 1.0.9 — 2023-09-19

Maintenance of some processes.

### 1.0.8 — 2023-07-05

Maintenance of some processes

### 1.0.7 — 2022-09-08

Maintenance of some processes

## Apps similar to Tri

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sextuple Calc](https://appshunter.io/ios/app/sextuple-calc/id6742039709) | — | Free | Utilities |
| [Duovigintuple Calc](https://appshunter.io/ios/app/duovigintuple-calc/id6742525847) | — | Free | Utilities |
| [Unvigintuple Calc](https://appshunter.io/ios/app/unvigintuple-calc/id6742525694) | — | Free | Utilities |
| [Septendecuple Calc](https://appshunter.io/ios/app/septendecuple-calc/id6742386411) | — | Free | Utilities |
| [Trivigintuple Calc](https://appshunter.io/ios/app/trivigintuple-calc/id6742525963) | — | Free | Utilities |
| [Novemvigintuple Calc](https://appshunter.io/ios/app/novemvigintuple-calc/id6742526542) | — | Free | Utilities |

## More apps by Thirdware.jp

- [Ryotei - GPS Tracker](https://appshunter.io/ios/app/ryotei-gps-tracker/id464228677)
- [MotoMainte](https://appshunter.io/ios/app/motomainte/id1542207719)

All apps by Thirdware.jp: https://appshunter.io/developer/464228680

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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 2026-08-21.*