# Mechanical Engineering Lab vs KIGAKU

The clearest difference is price: KIGAKU at Free against Mechanical Engineering Lab's $12.99. KIGAKU also leads on iOS requirement (15.0 vs 17.0). Mechanical Engineering Lab's advantage is ads (none vs shown). On update cadence, in-app purchases and device support there is nothing between them.

KIGAKU is free to download; Mechanical Engineering Lab costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mechanical Engineering Lab ships an update monthly, KIGAKU every 3 weeks. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Mechanical Engineering Lab | KIGAKU |
| --- | --- | --- |
| Price | $12.99 | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 5 MB | 26 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yuhsiu Lai](https://appshunter.io/developer/433114647) | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) |

## What reviewers say

### Mechanical Engineering Lab

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

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

**In-app purchases:** none


### KIGAKU

[App page](https://appshunter.io/ios/app/kigaku-how-machines-work/id6766719349)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mechanical Engineering Lab free?

Mechanical Engineering Lab costs $12.99, with no in-app purchases.

### Is KIGAKU free?

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

### Do Mechanical Engineering Lab or KIGAKU have ads?

KIGAKU shows ads; Mechanical Engineering Lab does not.

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

Mechanical Engineering Lab ships an update monthly, and KIGAKU every 3 weeks. Most recently, Mechanical Engineering Lab was updated on October 28, 2026 and KIGAKU on November 5, 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.*