# LKOS.Doku vs RST Photo

The clearest difference is update cadence: RST Photo at every 2 months against LKOS.Doku's every 11 months. RST Photo also leads on iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

LKOS.Doku ships an update every 11 months, RST Photo every 2 months. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | LKOS.Doku | RST Photo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 2 months** |
| Size | 34 MB | 40 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Landkreis Osnabrück](https://appshunter.io/developer/1555257324) | [The Reggio School of Tokyo](https://appshunter.io/developer/1764464490) |

## What reviewers say

### LKOS.Doku

[App page](https://appshunter.io/ios/app/lkosdoku/id1574286427)

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

**In-app purchases:** none


### RST Photo

[App page](https://appshunter.io/ios/app/rst-photo/id6657977458)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is LKOS.Doku free?

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

### Is RST Photo free?

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

### Do LKOS.Doku or RST Photo have ads?

Neither LKOS.Doku nor RST Photo shows ads.

### Which is updated more often, LKOS.Doku or RST Photo?

LKOS.Doku ships an update every 11 months, and RST Photo every 2 months. Most recently, LKOS.Doku was updated on October 12, 2026 and RST Photo on October 16, 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.*