# GSA vs Stop! Random letter generator

The clearest difference is review sentiment: Stop! Random letter generator at 70% against GSA's 6%. GSA's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Stop! Random letter generator sells 1 one-off in-app purchase. GSA asks for nothing beyond the download.

GSA ships an update every 6 months, Stop! Random letter generator every 4 months. The most recent releases landed on August 13, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | GSA | Stop! Random letter generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (45 ratings)](https://appshunter.io/ios/app/stop-random-letter-generator/id1530248644/reviews)** |
| Number of ratings | — | **45** |
| Positive reviews | 6.3% of reviews | **70.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 12 MB | 157 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Umweltbundesamt](https://appshunter.io/developer/583898621) | [Ivan Denardi](https://appshunter.io/developer/1530249006) |

## What reviewers say

### GSA

[App page](https://appshunter.io/ios/app/gsa/id1486352326)

Access comprehensive chemical information for emergency responders and specialists. Search for substances, transport regulations, and hazard data using various identifiers. Tailor information display with different user profiles.

**Highlights:** Chemical substance database, Transport search with visual warning signs, Search by substance name, CAS, or UN number, User-specific profiles for tailored information, Hazard and safety measure details, First aid instructions

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

**In-app purchases:** none


### Stop! Random letter generator

[App page](https://appshunter.io/ios/app/stop-random-letter-generator/id1530248644)

This app randomly selects letters for popular word games like Stop and Categories. It offers features like audible letter pronunciation, tracking used letters, and setting round timers to enhance gameplay. Shake your device to draw the next letter, making your games more dynamic.

**Highlights:** Random letter selection, Audible letter pronunciation, Track used letters, Set round time limits, Shake to draw letter

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $2.99 | one-time |


## Frequently asked questions

### Is GSA free?

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

### Is Stop! Random letter generator free?

Stop! Random letter generator is free to download, with in-app purchases available.

### Do GSA or Stop! Random letter generator have ads?

Stop! Random letter generator shows ads; GSA does not.

### Which is updated more often, GSA or Stop! Random letter generator?

GSA ships an update every 6 months, and Stop! Random letter generator every 4 months. Most recently, GSA was updated on August 13, 2026 and Stop! Random letter generator on September 27, 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.*