# YLMSportScience vs Reaction Lab

The clearest difference is rating: Reaction Lab at 5.0 against YLMSportScience's 4.5. Reaction Lab also leads on in-app purchases (none vs 5) and update cadence (every 4 weeks vs every 5 months). YLMSportScience's advantage is ads (none vs shown) and ratings volume (19 vs 1). On price there is nothing between them.

Both are free to download. YLMSportScience sells 5 in-app purchases, starting at $1.99 per month. Reaction Lab asks for nothing beyond the download.

Reaction Lab holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: YLMSportScience has 19 ratings behind it against 1, so its average is the more settled of the two.

YLMSportScience ships an update every 5 months, Reaction Lab every 4 weeks. The most recent releases landed on September 30, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | YLMSportScience | Reaction Lab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (19 ratings)](https://appshunter.io/ios/app/ylmsportscience/id1409592220/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/reaction-lab/id6784829225/reviews)** |
| Number of ratings | **19** | 1 |
| Positive reviews | 70.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 4 weeks** |
| Monetization | Subscription | **Ad-supported** |
| Size | 40 MB | 61 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YLMSportScience](https://appshunter.io/developer/1409592219) | [PINGPOD INC](https://appshunter.io/developer/1624080489) |

## What reviewers say

### YLMSportScience

[App page](https://appshunter.io/ios/app/ylmsportscience/id1409592220)

Access the latest sport science research summarized in easy-to-understand infographics. Improve your performance and coaching strategies with weekly updates in multiple languages. Explore categorized content and find original research links.

**Highlights:** Weekly infographics on sport science research, Summaries of latest scientific journal articles, Multilingual content (English, French, Spanish, Portuguese), Direct links to original research articles, Categorized content (Training, Nutrition, Recovery, etc.), Search engine for specific topics

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| YLMSportSci 1 month | $1.99 | per month |
| YLMSportScience 3 months | $7.49 | per 3 months |
| YLMSportScience 6 months | $10.49 | per 6 months |
| YLMSportScience 12 months | $20.49 | per year |
| YLMSportScience 12 months | $24.99 | per year |


### Reaction Lab

[App page](https://appshunter.io/ios/app/reaction-lab/id6784829225)

This app enhances athletic performance by optimizing visual processing, spatial awareness, and agility. It allows for seamless court booking, digital access to facilities, and provides detailed performance analytics through integrated technology.

**Highlights:** Instant court and session booking, Digital keyless facility access, 4K match replay viewing and sharing, Neurological development tracking, Millisecond-level reaction time monitoring, Seamless account and billing management

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is YLMSportScience free?

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

### Is Reaction Lab free?

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

### Which has better reviews, YLMSportScience or Reaction Lab?

Reaction Lab is rated higher. YLMSportScience averages 4.5 out of 5 from 19 ratings, while Reaction Lab averages 5.0 from 1 ratings.

### Do YLMSportScience or Reaction Lab have ads?

Reaction Lab shows ads; YLMSportScience does not.

### Which is updated more often, YLMSportScience or Reaction Lab?

YLMSportScience ships an update every 5 months, and Reaction Lab every 4 weeks. Most recently, YLMSportScience was updated on September 30, 2026 and Reaction Lab on September 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.*