# Triangle Calculators vs Semestra

The clearest difference is in-app purchases: Triangle Calculators at none against Semestra's 2. Semestra's advantage is update cadence (every 5 weeks vs every 26 months) and iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Semestra sells 2 in-app purchases, starting at $3.99 per month. Triangle Calculators asks for nothing beyond the download.

Triangle Calculators ships an update every 26 months, Semestra every 5 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Triangle Calculators | Semestra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/triangle-calculators/id1553722101/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 26 months | **Every 5 weeks** |
| Monetization | Ad-supported | — |
| Size | 39 MB | 38 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Perry Patterson](https://appshunter.io/developer/1844927499) |

## What reviewers say

### Triangle Calculators

[App page](https://appshunter.io/ios/app/triangle-calculators/id1553722101)

This app simplifies triangle calculations with intuitive inputs and clear diagrams. It covers various triangle types and theorems, offering over 125 calculations and supporting multiple units and languages.

**Highlights:** 125+ triangle calculations, Visual diagrams, Built-in formulas, Multiple unit support, 7 language options, Explores triangle types and theorems

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

**In-app purchases:** none


### Semestra

[App page](https://appshunter.io/ios/app/semestra/id6753771887)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly PRO | $3.99 | per month |
| Annual PRO | $34.99 | per year |


## Frequently asked questions

### Is Triangle Calculators free?

Triangle Calculators is free to download, with no in-app purchases.

### Is Semestra free?

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

### Do Triangle Calculators or Semestra have ads?

Both Triangle Calculators and Semestra show ads.

### Which is updated more often, Triangle Calculators or Semestra?

Triangle Calculators ships an update every 26 months, and Semestra every 5 weeks. Most recently, Triangle Calculators was updated on October 27, 2026 and Semestra on October 25, 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.*