# GDR vs YLMSportScience

The clearest difference is review sentiment: YLMSportScience at 70% against GDR's 19%. YLMSportScience also leads on iOS requirement (12.0 vs 15.6). GDR's advantage is in-app purchases (none vs 5) and update cadence (every 6 weeks vs every 5 months). On price, ads and device support there is nothing between them.

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

GDR ships an update every 6 weeks, YLMSportScience every 5 months. The most recent releases landed on September 26, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | GDR | YLMSportScience |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (19 ratings)](https://appshunter.io/ios/app/ylmsportscience/id1409592220/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | 19.2% of reviews | **70.4% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | **Free** | Subscription |
| Size | 288 MB | 40 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [(주)골프존](https://appshunter.io/developer/379892036) | [YLMSportScience](https://appshunter.io/developer/1409592219) |

## What reviewers say

### GDR

[App page](https://appshunter.io/ios/app/gdr/id572801387)

Enhance your golf game with a new practice routine. This app transforms repetitive golf practice into an engaging experience with detailed analysis of your performance, club usage, and swing comparisons. Set practice goals by comparing your data to higher-ranked players.

**Highlights:** Practice result overview, Club-specific analysis, Data comparison with top players, Swing comparison (yesterday vs. today), Performance tracking

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is GDR free?

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

### Is YLMSportScience free?

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

### Do GDR or YLMSportScience have ads?

Neither GDR nor YLMSportScience shows ads.

### Which is updated more often, GDR or YLMSportScience?

GDR ships an update every 6 weeks, and YLMSportScience every 5 months. Most recently, GDR was updated on September 26, 2026 and YLMSportScience 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.*