# Stellar Sort vs ReactionTraining

The clearest difference is in-app purchases: Stellar Sort at none against ReactionTraining's 3. Stellar Sort also leads on iOS requirement (15.0 vs 17.0). ReactionTraining's advantage is update cadence (every 5 days vs fortnightly). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Stellar Sort against 5.0 for ReactionTraining. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Stellar Sort ships an update fortnightly, ReactionTraining every 5 days. The most recent releases landed on October 21, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Stellar Sort | ReactionTraining |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/stellar-sort-ball-sort-puzzle/id6782845826/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/reactiontraining-reflex-test/id6794790106/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 102 MB | 26 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mariyan Petrov](https://appshunter.io/developer/6782845828) | [Zrindy LLC](https://appshunter.io/developer/1876720455) |

## What reviewers say

### Stellar Sort

[App page](https://appshunter.io/ios/app/stellar-sort-ball-sort-puzzle/id6782845826)

Engage in a relaxing logic puzzle game set among the stars. Move colorful planets between tubes to match sets and restore order to the galaxy. Hundreds of levels offer increasing challenges with unique mechanics and helpful tools.

**Highlights:** Relaxing sorting puzzle gameplay, Colorful planet-themed pieces, Hundreds of levels, Unique Black Hole mechanic, Undo and Hint tools, 3-star challenges

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Stellar Sort free?

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

### Is ReactionTraining free?

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

### Which has better reviews, Stellar Sort or ReactionTraining?

Stellar Sort and ReactionTraining are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Stellar Sort or ReactionTraining have ads?

Both Stellar Sort and ReactionTraining show ads.

### Which is updated more often, Stellar Sort or ReactionTraining?

Stellar Sort ships an update fortnightly, and ReactionTraining every 5 days. Most recently, Stellar Sort was updated on October 21, 2026 and ReactionTraining on October 10, 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.*