# YLMSportScience vs RacingRulesOfSailing.org

The clearest difference is review sentiment: YLMSportScience at 70% against RacingRulesOfSailing.org's 25%. YLMSportScience also leads on rating (4.5 vs 2.4) and ratings volume (19 vs 5). RacingRulesOfSailing.org's advantage is in-app purchases (none vs 5) and update cadence (every 5 weeks vs every 5 months). On price, ads, device support and iOS requirement there is nothing between them.

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

YLMSportScience holds the better App Store score, 4.5 against 2.4. Both are backed by a comparable volume of ratings — 19 and 5 respectively. Written reviews point the same way: 70% of YLMSportScience's written reviews are positive against 25% of RacingRulesOfSailing.org's.

YLMSportScience ships an update every 5 months, RacingRulesOfSailing.org every 5 weeks. The most recent releases landed on September 21, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | YLMSportScience | RacingRulesOfSailing.org |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (19 ratings)](https://appshunter.io/ios/app/ylmsportscience/id1409592220/reviews)** | [2.4 (5 ratings)](https://appshunter.io/ios/app/racingrulesofsailingorg/id1443702609/reviews) |
| Number of ratings | **19** | 5 |
| Positive reviews | **70.4% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 weeks** |
| Monetization | Subscription | **Free** |
| Size | 40 MB | 41 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [YLMSportScience](https://appshunter.io/developer/1409592219) | [Paul Zupan](https://appshunter.io/developer/1443702608) |

## 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 |


### RacingRulesOfSailing.org

[App page](https://appshunter.io/ios/app/racingrulesofsailingorg/id1443702609)

Manage sailing race documents, scoring, and official tasks. Competitors can electronically file inquiries and protests, which are automatically routed to the correct officials for efficient event management.

**Highlights:** Document management, Scoring, Jury tasks, Electronic inquiries, Protest filing, Hearing schedule

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

**In-app purchases:** none


## Frequently asked questions

### Is YLMSportScience free?

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

### Is RacingRulesOfSailing.org free?

RacingRulesOfSailing.org is free to download, with no in-app purchases.

### Which has better reviews, YLMSportScience or RacingRulesOfSailing.org?

YLMSportScience is rated higher. YLMSportScience averages 4.5 out of 5 from 19 ratings, while RacingRulesOfSailing.org averages 2.4 from 5 ratings.

### Do YLMSportScience or RacingRulesOfSailing.org have ads?

Neither YLMSportScience nor RacingRulesOfSailing.org shows ads.

### Which is updated more often, YLMSportScience or RacingRulesOfSailing.org?

YLMSportScience ships an update every 5 months, and RacingRulesOfSailing.org every 5 weeks. Most recently, YLMSportScience was updated on September 21, 2026 and RacingRulesOfSailing.org on September 12, 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.*