# docu tools vs RSA21.app

The clearest difference is iOS requirement: RSA21.app at 15.0 against docu tools's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

docu tools ships an update fortnightly, RSA21.app weekly. The most recent releases landed on October 13, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | docu tools | RSA21.app |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free | — |
| Size | 327 MB | 29 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [docu tools GmbH](https://appshunter.io/developer/552989378) | [KMS Gruppe](https://appshunter.io/developer/6810972514) |

## What reviewers say

### docu tools

[App page](https://appshunter.io/ios/app/docu-tools-baudokumentation/id1316586033)

This app streamlines project documentation with plan-based photo capture and reporting. It facilitates team collaboration, saves time on workflows, and ensures secure, accessible project data.

**Highlights:** Plan-based photo documentation, Time-saving workflows, Seamless collaboration, Customizable reports, Offline data synchronization, Digital plan import

**Features:** Vision Pro support

**In-app purchases:** none


### RSA21.app

[App page](https://appshunter.io/ios/app/rsa21app/id6810972512)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is docu tools free?

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

### Is RSA21.app free?

RSA21.app is free to download, with no in-app purchases.

### Do docu tools or RSA21.app have ads?

Neither docu tools nor RSA21.app shows ads.

### Which is updated more often, docu tools or RSA21.app?

docu tools ships an update fortnightly, and RSA21.app weekly. Most recently, docu tools was updated on October 13, 2026 and RSA21.app on October 26, 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.*