# ReactionTraining vs Star Groups

The clearest difference is in-app purchases: Star Groups at none against ReactionTraining's 3. Star Groups also leads on update cadence (daily vs weekly) and ratings volume (3 vs 1). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. ReactionTraining sells 3 in-app purchases, starting at $0.99 per month. Star Groups asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for ReactionTraining against 5.0 for Star Groups. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

ReactionTraining ships an update weekly, Star Groups daily. Both last shipped on October 31, 2026.

## The numbers

| Metric | ReactionTraining | Star Groups |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/reactiontraining-reflex-test/id6794790106/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/star-groups/id6812230369/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Daily** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 28 MB | 9 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zrindy LLC](https://appshunter.io/developer/1876720455) | [Typress](https://appshunter.io/developer/6807032113) |

## What reviewers say

### ReactionTraining

[App page](https://appshunter.io/ios/app/reactiontraining-reflex-test/id6794790106)

Measure your visual reaction time with this app. It presents a green signal after a random delay, prompting you to tap as fast as possible. Track your progress over time and compare your results with others.

**Highlights:** Measures visual reaction time, Five-attempt average and best time, Session history and progress charts, Reaction-time tiers and progress gauge, Comparison with benchmark statistics, Friend records and goals

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $0.99 | per month |
| Annual Premium | $2.99 | per year |
| Lifetime Premium | $8.99 | one-time |


### Star Groups

[App page](https://appshunter.io/ios/app/star-groups/id6812230369)

A minimalist logic puzzle game where you connect scattered stars into constellations using row and column clues. It offers simple rules with deep logic, designed for quick play sessions with increasing difficulty.

**Highlights:** Connect scattered stars, Solve constellation puzzles, Use row and column clues, Minimalist visual design, Short, pick-up-and-play puzzles, Increasingly challenging levels

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

**In-app purchases:** none


## Frequently asked questions

### Is ReactionTraining free?

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

### Is Star Groups free?

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

### Which has better reviews, ReactionTraining or Star Groups?

ReactionTraining and Star Groups are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do ReactionTraining or Star Groups have ads?

Both ReactionTraining and Star Groups show ads.

### Which is updated more often, ReactionTraining or Star Groups?

ReactionTraining ships an update weekly, and Star Groups daily. Most recently, ReactionTraining was updated on October 31, 2026 and Star Groups on October 31, 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.*