# FAST vs 900s

The clearest difference is in-app purchases: FAST at none against 900s's 4. FAST also leads on device support (3 vs 1) and iOS requirement (13.4 vs 16.4). 900s's advantage is update cadence (weekly vs every 5 months). On price and ads there is nothing between them.

Both are free to download. 900s sells 4 in-app purchases, starting at $0.99 per month. FAST asks for nothing beyond the download.

FAST ships an update every 5 months, 900s weekly. The most recent releases landed on September 9, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | FAST | 900s |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | — | Freemium |
| Size | 20 MB | 78 MB |
| Requires iOS | **13.4** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Stiftung Deutsche Schlaganfall-Hilfe](https://appshunter.io/developer/1510529154) | [Unit U+2467 GmbH](https://appshunter.io/developer/1781273662) |

## What reviewers say

### FAST

[App page](https://appshunter.io/ios/app/fast-test/id1510529155)

**Features:** macOS Compatibility

**In-app purchases:** none


### 900s

[App page](https://appshunter.io/ios/app/900s/id6746439317)

Learn complex ideas through engaging, podcast-style audio episodes. Interact with AI to ask questions and explore topics in real time. Fits learning into short, 15-minute daily sessions.

**Highlights:** Podcast-style learning episodes, 15-minute daily learning sessions, AI-powered interactive Q&A, Curated content on various topics, Personalized library and progress tracking, Offline downloads with premium

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic – monatlich | $0.99 | per month |
| Plus – monatlich | $2.99 | per month |
| Ultimate | $3.99 | per month |
| BILDplus + 900s | $6.99 | per month |


## Frequently asked questions

### Is FAST free?

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

### Is 900s free?

900s is free to download, with in-app purchases available.

### Do FAST or 900s have ads?

Neither FAST nor 900s shows ads.

### Which is updated more often, FAST or 900s?

FAST ships an update every 5 months, and 900s weekly. Most recently, FAST was updated on September 9, 2026 and 900s on September 21, 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.*