# KAIRAKU vs LabOptique

The clearest difference is ads: LabOptique at none against KAIRAKU's shown. KAIRAKU's advantage is update cadence (every 6 days vs every 3 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KAIRAKU ships an update every 6 days, LabOptique every 3 months. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | KAIRAKU | LabOptique |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 6 days** | Every 3 months |
| Size | 34 MB | 7 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fuji Bit Inc.](https://appshunter.io/developer/1874205957) | [Thomas Roy](https://appshunter.io/developer/6780095310) |

## What reviewers say

### KAIRAKU

[App page](https://appshunter.io/ios/app/kairaku/id6768781085)

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

**In-app purchases:** none


### LabOptique

[App page](https://appshunter.io/ios/app/laboptique/id6780277549)

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

**In-app purchases:** none


## Frequently asked questions

### Is KAIRAKU free?

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

### Is LabOptique free?

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

### Do KAIRAKU or LabOptique have ads?

KAIRAKU shows ads; LabOptique does not.

### Which is updated more often, KAIRAKU or LabOptique?

KAIRAKU ships an update every 6 days, and LabOptique every 3 months. Most recently, KAIRAKU was updated on October 28, 2026 and LabOptique 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.*