# DokuAI vs RSA21.app

The clearest difference is in-app purchases: RSA21.app at none against DokuAI's 3. RSA21.app also leads on iOS requirement (15.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DokuAI sells 3 in-app purchases, starting at $3.99 per 7 days. RSA21.app asks for nothing beyond the download.

DokuAI ships an update weekly, RSA21.app every 8 days. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | DokuAI | RSA21.app |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dokuai-site-documentation/id6749177847/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 8 days |
| Monetization | Freemium | — |
| Size | 60 MB | 29 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DigitalFreedom Global LLC](https://appshunter.io/developer/1825359468) | [KMS Gruppe](https://appshunter.io/developer/6810972514) |

## What reviewers say

### DokuAI

[App page](https://appshunter.io/ios/app/dokuai-site-documentation/id6749177847)

Streamline construction site reporting with AI. Capture photos and voice notes, and the app automatically generates structured reports with timestamps, GPS data, and annotations. Sign and export reports as PDFs for easy sharing.

**Highlights:** AI-powered report generation, Voice note transcription, Photo annotation and AR measurements, Digital signatures, Customizable letterhead, Defect classification

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $89.99 | per year |


### RSA21.app

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

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

**In-app purchases:** none


## Frequently asked questions

### Is DokuAI free?

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

### Is RSA21.app free?

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

### Do DokuAI or RSA21.app have ads?

Neither DokuAI nor RSA21.app shows ads.

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

DokuAI ships an update weekly, and RSA21.app every 8 days. Most recently, DokuAI was updated on October 30, 2026 and RSA21.app on November 6, 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.*