# Beautiful Trigonometry vs Mechanical Engineering Lab

The clearest difference is price: Beautiful Trigonometry at Free against Mechanical Engineering Lab's $2.99. Mechanical Engineering Lab's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 3 months). On ads, device support and iOS requirement there is nothing between them.

Beautiful Trigonometry is free to download; Mechanical Engineering Lab costs $2.99 up front. Beautiful Trigonometry sells 1 one-off in-app purchase. Mechanical Engineering Lab asks for nothing beyond the download.

Beautiful Trigonometry ships an update every 3 months, Mechanical Engineering Lab monthly. The most recent releases landed on May 16, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Beautiful Trigonometry | Mechanical Engineering Lab |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Size | 8 MB | 5 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tomasz Rygula](https://appshunter.io/developer/879228654) | [Yuhsiu Lai](https://appshunter.io/developer/433114647) |

## What reviewers say

### Beautiful Trigonometry

[App page](https://appshunter.io/ios/app/beautiful-trigonometry/id6746460113)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Trigonometry Access | $1.99 | one-time |


### Mechanical Engineering Lab

[App page](https://appshunter.io/ios/app/mechanical-engineering-lab/id6766063704)

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

**In-app purchases:** none


## Frequently asked questions

### Is Beautiful Trigonometry free?

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

### Is Mechanical Engineering Lab free?

Mechanical Engineering Lab costs $2.99, with no in-app purchases.

### Do Beautiful Trigonometry or Mechanical Engineering Lab have ads?

Neither Beautiful Trigonometry nor Mechanical Engineering Lab shows ads.

### Which is updated more often, Beautiful Trigonometry or Mechanical Engineering Lab?

Beautiful Trigonometry ships an update every 3 months, and Mechanical Engineering Lab monthly. Most recently, Beautiful Trigonometry was updated on May 16, 2026 and Mechanical Engineering Lab on September 17, 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.*