# Lang.Guru vs Rock Identifier

The clearest difference is in-app purchases: Lang.Guru at none against Rock Identifier's 2. Lang.Guru also leads on iOS requirement (13.0 vs 15.1). Rock Identifier's advantage is ratings volume (9 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Rock Identifier sells 2 in-app purchases, starting at $4.99 per 7 days. Lang.Guru asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Lang.Guru against 4.9 for Rock Identifier. That said, the two scores are not equally well evidenced: Rock Identifier has 9 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | Lang.Guru | Rock Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/langguru/id6751522600/reviews)** | [4.9 (9 ratings)](https://appshunter.io/ios/app/rock-identifier-crystal/id6767669488/reviews) |
| Number of ratings | 1 | **9** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 8 days |
| Monetization | **Free** | Subscription |
| Size | 77 MB | 62 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | +4 |
| Developer | [Lang.Guru, LLC](https://appshunter.io/developer/1835581935) | [H2A Digital LLC](https://appshunter.io/developer/1856303961) |

## What reviewers say

### Lang.Guru

[App page](https://appshunter.io/ios/app/langguru/id6751522600)

Learn conversational language with nearly a million examples per language. Focus on idiomatic usage and deep vocabulary organized by frequency. Explore phrases and words as pivots for discovery, directing your own learning journey with fun games and exercises.

**Highlights:** Conversational and idiomatic usage, Nearly a million unique examples per language, Vocabulary organized by frequency, Phrase and word exploration, Interactive games and exercises, Hands-free learning options

**Features:** macOS Compatibility

**In-app purchases:** none


### Rock Identifier

[App page](https://appshunter.io/ios/app/rock-identifier-crystal/id6767669488)

Instantly identify rocks, crystals, gemstones, and minerals with a photo. Learn detailed information about their appearance, origins, and composition. Explore the natural world and build your collection with this AI-powered identification tool.

**Highlights:** Identify rocks, crystals, and minerals from photos, AI-powered analysis in seconds, Detailed information on appearance and origin, Upload photos or take pictures directly, Save and revisit identification history, Identify gemstones in jewelry

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $4.99 | per 7 days |
| Yearly Access | $29.99 | per year |


## Frequently asked questions

### Is Lang.Guru free?

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

### Is Rock Identifier free?

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

### Which has better reviews, Lang.Guru or Rock Identifier?

Lang.Guru is rated higher. Lang.Guru averages 5.0 out of 5 from 1 ratings, while Rock Identifier averages 4.9 from 9 ratings.

### Do Lang.Guru or Rock Identifier have ads?

Neither Lang.Guru nor Rock Identifier shows ads.

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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.*