# Isosceles Triangle PRO — Calculates all quantities

> Calculates all quantities of an isosceles triangle with formulas and step-by-step solutions. (iPhone/iPad app by Glindemann, Sennoun, Langer GbR.)

- Source: https://appshunter.io/ios/app/isosceles-triangle-pro/id1568944096 (this page in markdown: same URL + `.md`)
- Developer: [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809)
- Category: Education, Utilities
- Price: $2.99
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 15.0 · 179 MB
- Languages: American English, French (France), German (Germany), Hindi, Indonesian, Japanese, Korean, Brazilian Portuguese, Russian, Chinese (Simplified, China) and 1 more
- Released: 2021-07-06
- Data updated: 2026-08-19
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/isosceles-triangle-pro/id1568944096/reviews.md

## What is Isosceles Triangle PRO?

The best app to calculate all quantities of an isosceles triangle. You must enter some quantities like an angle and a length. The algorithm searches the formulas of the missing quantities, shows them and calculates the results.

The calculation of an isosceles triangle depends on one certain characteristic. Either it is obtuse angled or acute angled. Both is handled in this app. You just have to touch the button to switch the appearance of your isosceles triangle.

The length of the decimal place can be changed. The algorithm shows when rounding or wrong values lead to an opposition.

Decimals and fractions are supported. The solution is shown step by step. All calculations are stored in the history. The final solution can be shared.

[ Content ]
- all important quantities for the isosceles triangle
- formulas for all important quantities of an isosceles triangle
- infographic to illustrate the topic
- search bar to find the desired quantity
- history function to save the input
- detailed solution
- positive numbers, decimals and fractions are supported
- changeable decimal place
- changeable appearance of your triangle (obtuse angled - acute angled)
- no ads!

[ Usage ]
- there are several fields for entering the values ​​using a special keyboard
- if values are missing, all fields are highlighted in orange
- if values are conflicting or wrong (e.g. negative lengths), one affected field is highlighted in red
- every value must be positive
- if a value is no number, it is highlighted in red
- the entries in the history can be deleted or sorted manually
- if you select an entry in the history, it will be loaded automatically for the calculation
- the entire history can be deleted by pressing a button
- solutions can be shared

[ Acute angled ] 
- gamma must be less than 90°
- alpha must be greater than 45° and less than 90°

[ Obtuse angled ] 
- gamma must be greater than or equal 90° and less than 180°
- alpha must be less than or equal 45°

## Key features

- Calculate all isosceles triangle quantities
- Display formulas for calculations
- Supports acute and obtuse triangles
- Handles decimals and fractions
- Step-by-step solution display
- History function for saved calculations
- Adjustable decimal places


## Frequently asked questions about Isosceles Triangle PRO

### What quantities can Isosceles Triangle PRO calculate?

Isosceles Triangle PRO can calculate all important quantities for an isosceles triangle, including angles, side lengths, area, and perimeter. It provides the relevant formulas and shows the results step-by-step.

### Does Isosceles Triangle PRO support both acute and obtuse triangles?

Yes, Isosceles Triangle PRO handles both acute and obtuse angled isosceles triangles. You can switch the appearance of the triangle within the app to match your specific case.

### Can I input decimal and fractional values into Isosceles Triangle PRO?

Yes, Isosceles Triangle PRO supports both decimal and fractional inputs. You can also change the length of the decimal place for your calculations.

### How does Isosceles Triangle PRO handle incorrect or conflicting input?

If values are missing, the corresponding fields are highlighted in orange. Conflicting or wrong values, such as negative lengths, will cause an affected field to be highlighted in red.

### Does Isosceles Triangle PRO have ads?

No, Isosceles Triangle PRO is ad-free. The app description explicitly states 'no ads!', ensuring an uninterrupted user experience.

### What is the price of Isosceles Triangle PRO?

Isosceles Triangle PRO is a paid application, priced at $2.99. This one-time purchase grants access to all its features.

### How often is Isosceles Triangle PRO updated?

The latest version of Isosceles Triangle PRO is 2.1.9, last updated on June 2, 2026. This indicates a recent update, suggesting ongoing support.

### Can I share my calculations from Isosceles Triangle PRO?

Yes, the app allows you to share your final solutions. This feature is useful for students or educators who need to present their work.

## Version history (last 5 releases)

### 2.2.3 — 2026-08-14

The latest release 'Least common multiple' is linked in the menu section now.

Minor performance and UI fixes.

### 2.2.2 — 2026-08-04

- the status bar on top is integrated into the current app design
- the app flow was improved (pop-up information was balanced)

### 2.2.1 — 2026-07-17

Maintenance update. Improving performance.

### 2.2.0 — 2026-06-19

Bringing all apps to the same security standard. Critical storage behaviour for solutions has been fixed.

By the way - I run many apps with different math topics. If you like this one: Check them out as well!

I always do my best to keep a high standard on my apps. If something does not meet the expectations, do not hesitate to contact me.

### 2.1.10 — 2026-06-06

There were some major fixes and adjustments for a more stable behaviour of the solution storage and loading. Therefore some database changes were made in the background. There are no performance losses and the functionality does not change. The background tasks are only done once within milliseconds. Following behaviour may occur (only temporary):
- stored calculations have to be tapped twice to load fully
- the order of the stored solutions may change

If there are some losses of solutions do not hesitate to contact me and tell me the number of lost solutions + affected app. I will find a solution for this.

Kind regards, Alex (the Dev)

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All apps by Glindemann, Sennoun, Langer GbR: https://appshunter.io/developer/1024972809

## Related topics

[isosceles triangle pro](https://appshunter.io/ios/topics/isosceles-triangle-pro) · [isosceles triangle](https://appshunter.io/ios/topics/isosceles-triangle)

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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 2026-08-19.*