# Trigonometry calc vs Isosceles Triangle

The clearest difference is ads: Isosceles Triangle at none against Trigonometry calc's shown. Isosceles Triangle also leads on update cadence (every 3 weeks vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Trigonometry calc sells 1 one-off in-app purchase and Isosceles Triangle sells 8 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Trigonometry calc ships an update every 3 months, Isosceles Triangle every 3 weeks. The most recent releases landed on September 6, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Trigonometry calc | Isosceles Triangle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-calc/id1306864057/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 10 MB | 180 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bo Kalvslund](https://appshunter.io/developer/572272193) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Trigonometry calc

[App page](https://appshunter.io/ios/app/trigonometry-calc/id1306864057)

Calculate side lengths and angles in right-angled triangles using Pythagorean theorem and trigonometry functions. Learn basic trigonometry concepts. An optional premium version removes ads and unlocks a general triangle calculator.

**Highlights:** Calculate side lengths, Calculate angles, Pythagorean Theorem, Trigonometry functions, Learn simple trigonometry, General triangle calculator (premium)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $0.99 | one-time |


### Isosceles Triangle

[App page](https://appshunter.io/ios/app/isosceles-triangle/id1568944138)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $2.99 | one-time |
| Lifetime Access | $2.99 | one-time |


## Frequently asked questions

### Is Trigonometry calc free?

Trigonometry calc is free to download, with in-app purchases available.

### Is Isosceles Triangle free?

Isosceles Triangle is free to download, with in-app purchases available.

### Do Trigonometry calc or Isosceles Triangle have ads?

Trigonometry calc shows ads; Isosceles Triangle does not.

### Which is updated more often, Trigonometry calc or Isosceles Triangle?

Trigonometry calc ships an update every 3 months, and Isosceles Triangle every 3 weeks. Most recently, Trigonometry calc was updated on September 6, 2026 and Isosceles Triangle on September 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*