ReactionTraining vs Star Groups
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
ReactionTraining
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.
- 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
Read full descriptionHide full description
ReactionTraining Start with a 3-round first try. Then choose 1, 3, 5, or 7 rounds for round-based games. Key Features - Session history and line charts for progress - Reaction-time tiers and a progress gauge, and comparison with Human Benchmark statistics and cited public results - Friend records and goals, plus source and video links Premium unlocks full history and detailed analysis, the complete tier guide, and friend goals. Monthly and annual plans renew automatically until canceled; lifetime access is a one-time purchase. Localized prices appear in the app, and Restore Purchases is available. Test and friend data stay on your device, and no account is required. Public-figure results are reference values, not a scientific or official esports ranking. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Star Groups
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.
- Connect scattered stars
- Solve constellation puzzles
- Use row and column clues
- Minimalist visual design
- Short, pick-up-and-play puzzles
- Increasingly challenging levels
Read full descriptionHide full description
The stars are already on the grid. Connect the ones that belong to the same constellation. The number on each row and column counts main stars, not every star in that line. In a constellation, the main star is the one at the top-left. After you connect them, the main star stays the same size. The others shrink. You work from the numbers. It feels like a logic puzzle. It is not Sudoku, and the shape is not given in advance.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | ReactionTraining | Star Groups |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Weekly | Daily — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 28 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Zrindy LLC | Typress |
Customer experience
ReactionTraining
Star Groups
In-app purchases
ReactionTraining
- Monthly Premium$0.991 Month
- Annual Premium$2.991 Year
- Lifetime Premium$8.99
Star Groups
No in-app purchases
