# Trivice HD — Triangle Calculator

> Calculates all triangle properties using graphical input and exports results. (iPhone/iPad app by Oliver Hahn.)

- Source: https://appshunter.io/ios/app/trivice-hd/id375604287 (this page in markdown: same URL + `.md`)
- Developer: [Oliver Hahn](https://appshunter.io/developer/324458008)
- Category: Utilities, Education
- Price: $0.99
- Rating: 5.00/5 from 1 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 4 MB
- Languages: American English, German (Germany)
- Released: 2010-06-15
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/trivice-hd/id375604287/reviews.md

## What is Trivice HD?

The formulary with the law of cosines can stay in the drawer: Trivice HD calculates the values of any given triangle.
The necessary parameters are:

- Three sides or
- Two sides and one angle or
- One side and two angles

The input is made completely without the keypad by using the graphical controllers on the corners and edges. Fractions can also be set, for example for imperial units. The value of the active controller is shown in the display in the middle of the device.

In addition to all angles and sides, the area, height, perimeter, inner and outer circle are calculated. The result is shown graphical as well as numeric and can be exported as an image or pdf file. The last calculations can be recalled from the history.

A detailed manual is included.

Also available is Trivice for iPhone and iPod Touch.

## Key features

- Calculates all triangle values
- Graphical input controllers
- Supports fractions for units
- Exports results as image/PDF
- Includes calculation history
- Detailed in-app manual

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/trivice-hd/id375604287/reviews.md

### 5/5 — Great Application!

*2013-09-03, version 2.0*

Ok, I get that not every iPad user is itching to know the length of the hypotenuse of a right triangle with equal sides, or the tangent to the center of the interior circle that is fits within a triangle, or the exterior circle that touches all three angles on a triangle, or any of the infinite questions you can ask about a triangle. Yes, I get that. 

But for the rest of us, those who either are curious or whose work deals with knowing such numbers for whatever reason, be it nuclear physics or building a doghouse, this little app is positively amazing. This is what we all wished for when taking Algebra II or Analytic Geometry. (and we only had slide rules when I did that, and weren't allowed to use them on tests) 

This app is amazing just to play with! If you're interested in number relationships when dealing with sines, cosines, and the like, but you don't carry around a lookup table, and you don't fancy deriving them each time in your head, then you'll LOVE this app. 

If you've ever used a radial saw, but didn't want to guess at the angles for a strut or truss, then you were wishing for this app. It's ridiculously simple to use. Double tap or triple tap any input scale to change the scale for faster input of large numbers. The center dial sets the fractional or decimal element of your lengths. It's all tap and drag. I can't see any reasonable problem involving triangles that can't be solved or aided with this tool. 

For 99 cents? C'mon! It's a no-brainer! I'd pay $99 bucks for this. 

Shooshie

### 5/5 — Truss Design

*2012-02-09, version 1.1*

Most excellent, I currently am building some custom trusses and this makes finding the cut angles easy :-), yep, I could bring out my old college text books, but this gives a visual and you can do the "what if thing".  Nice application.

## Frequently asked questions about Trivice HD

### What triangle parameters can Trivice HD calculate?

Trivice HD calculates all angles, sides, area, height, perimeter, and inner/outer circles for any given triangle. It can solve for unknowns with three sides, two sides and one angle, or one side and two angles.

### How is input handled in Trivice HD?

Input is managed entirely through graphical controllers on the corners and edges, eliminating the need for a keypad. This method allows for intuitive adjustments and the setting of fractional values, useful for imperial units.

### Can I export my triangle calculations from Trivice HD?

Yes, the results from Trivice HD can be exported as an image or a PDF file. This feature is useful for documentation, sharing, or incorporating into other projects.

### Does Trivice HD offer a history of past calculations?

Yes, Trivice HD includes a history feature that allows you to recall your last calculations. This is convenient for reviewing previous work or referencing past triangle solutions.

### What devices is Trivice HD compatible with?

Trivice HD is currently supported on iPads. A version for iPhone and iPod Touch is also available.

### How frequently is Trivice HD updated?

The latest version of Trivice HD is 3.1, last updated on November 18, 2020. While updates have not been very frequent recently, the app is stable and functional.

### What is the age rating for Trivice HD?

Trivice HD has an age rating of 4+. This indicates it is suitable for a wide range of users, including younger students learning geometry.

### Does Trivice HD contain advertisements?

Based on the provided data, there is no information indicating the presence of advertisements in Trivice HD. It is a paid application.

## Version history (last 5 releases)

### 3.1 — 2020-11-18

Export of the results as image or PDF
Calculation during input
Preview of the calculated triangle on the edit screen
Request for a rating (at max one time per version)

### 3.0 — 2020-02-05

Design update
Support for Split View
Support for iOS 13 and Dark Mode
Integration of Imprint and Privacy Policy
Refined Quick Help

### 2.0.2 — 2017-09-26

Support for iOS 11

### 2.0.1 — 2013-09-20

Adjustments for iOS 7
Fixed an Error where the display and reset functions might not be available

### 2.0 — 2013-07-16

Refined User Interface
Display of results during construction
New help system

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## More apps by Oliver Hahn

- [Trivice](https://appshunter.io/ios/app/trivice/id324458005)
- [Polytrome](https://appshunter.io/ios/app/polytrome/id367282309)
- [Quinterval](https://appshunter.io/ios/app/quinterval/id373810100)
- [Field of Depth](https://appshunter.io/ios/app/field-of-depth/id662879911)
- [Trilight - Trivice Light](https://appshunter.io/ios/app/trilight-trivice-light/id670194444)

All apps by Oliver Hahn: https://appshunter.io/developer/324458008

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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 2026-06-10.*