# SL!NG vs Reaction Test

The clearest difference is in-app purchases: SL!NG at none against Reaction Test's 7. Reaction Test's advantage is update cadence (every 2 days vs every 11 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Reaction Test sells 7 one-off in-app purchases. SL!NG asks for nothing beyond the download.

SL!NG ships an update every 11 days, Reaction Test every 2 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | SL!NG | Reaction Test |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 11 days | **Every 2 days** |
| Size | 13 MB | 9 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Armin Miranda](https://appshunter.io/developer/6785915921) | [Cosmin Iulian Zimbroianu](https://appshunter.io/developer/6776307764) |

## What reviewers say

### SL!NG

[App page](https://appshunter.io/ios/app/slng/id6787027850)

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

**In-app purchases:** none


### Reaction Test

[App page](https://appshunter.io/ios/app/reaction-test-reflex-rush/id6804288065)

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 600 Coins | $0.99 | one-time |
| Void Skin | $1.99 | one-time |
| Plasma Skin | $1.99 | one-time |
| Pro | $2.99 | one-time |
| 2,000 Coins | $2.99 | one-time |
| Starter Pack | $3.99 | one-time |
| 6,000 Coins | $3.99 | one-time |


## Frequently asked questions

### Is SL!NG free?

SL!NG is free to download, with no in-app purchases.

### Is Reaction Test free?

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

### Do SL!NG or Reaction Test have ads?

Both SL!NG and Reaction Test show ads.

### Which is updated more often, SL!NG or Reaction Test?

SL!NG ships an update every 11 days, and Reaction Test every 2 days. Most recently, SL!NG was updated on October 31, 2026 and Reaction Test on October 25, 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.*