# e vs Rock ID

The clearest difference is rating: Rock ID at 4.4 against e's 3.0. Rock ID also leads on ratings volume (3.1K vs 2). e's advantage is review sentiment (67% vs 37%) and monetization model (free vs free with in-app purchases). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. e sells 3 in-app purchases, starting at $22.99 per 3 months and Rock ID sells 13 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Rock ID holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Rock ID has 3.1K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 67% of e's written reviews are positive against 37% of Rock ID's, so the app with the better star average is not the one people write more warmly about.

e ships an update every 2 months, Rock ID monthly. The most recent releases landed on October 19, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | e | Rock ID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/e-rocks/id1479976121/reviews) | **[4.4 (3.1K ratings)](https://appshunter.io/ios/app/rock-id-stone-identifier/id6469999508/reviews)** |
| Number of ratings | 2 | **3.1K** |
| Positive reviews | **66.7% of reviews** | 37.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 52 MB | 48 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mark Wrigley](https://appshunter.io/developer/1479976120) | [AIBY](https://appshunter.io/developer/1458102137) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-rocks/id1479976121)

Access a comprehensive database of over 6200 mineral species with detailed facts, including names, formulas, occurrences, and properties. This offline-capable app provides quick lookups and links to a larger online mineral catalog.

**Highlights:** 6200+ mineral species database, Detailed species information, Offline access, Links to e-Rocks.com catalog, Quick and easy to use

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| e-Rocks Collectors 3 Months | $22.99 | per 3 months |
| e-Rocks Collectors 6 Months | $39.00 | per 6 months |
| e-Rocks Collectors Annual | $79.00 | per year |


### Rock ID

[App page](https://appshunter.io/ios/app/rock-id-stone-identifier/id6469999508)

Instantly identify rocks, minerals, and gems by snapping a photo. Explore detailed profiles, manage your personal collections, and keep a log of all your discoveries. Become a geology expert with this comprehensive guide.

**Highlights:** Instant AI-powered stone identification, Vast catalog of rock profiles, Personal rock and mineral collections, Detailed history of identifications, Learn rock composition and origin, Distinguish real gems from fakes

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rock ID PRO | $4.99 | per 7 days |
| Rock ID PRO | $4.99 | per 7 days |
| Weekly access (3 days trial) | $5.99 | per 7 days |
| Weekly access | $5.99 | per 7 days |
| Weekly access (3 days trial) | $6.99 | per 7 days |
| Weekly access | $6.99 | per 7 days |
| Rock ID PRO | $6.99 | per 7 days |
| Rock ID PRO | $6.99 | per 7 days |
| Yearly premium subscription | $19.99 | per year |
| Yearly access (3 days trial) | $19.99 | per year |
| Yearly premium subscription | $29.99 | per year |
| Rock ID PRO | $29.99 | per year |
| Yearly premium subscription | $39.99 | per year |

**What reviewers like**

- 👍 Easy to use
- 🚀 Instant identification
- 💡 Extensive stone library
- 🎓 Helpful for education

**What reviewers complain about**

- 🐛 Inconsistent identification accuracy
- 💰 Paywall after limited free scans
- 🤔 Questionable reliability for valuable stones
- 📷 Camera quality issues for small gems

**Reported bugs**

- Incorrect identification of common stones
- Failure to recognize obvious stone types
- Inability to scan certain stones

**Requested features**

- More detailed stone information
- Improved identification accuracy
- Ability to manually correct misidentifications
- Option to disable paywall for limited use


## Frequently asked questions

### Is e free?

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

### Is Rock ID free?

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

### Which has better reviews, e or Rock ID?

Rock ID is rated higher. e averages 3.0 out of 5 from 2 ratings, while Rock ID averages 4.4 from 3.1K ratings.

### Do e or Rock ID have ads?

Neither e nor Rock ID shows ads.

### Which is updated more often, e or Rock ID?

e ships an update every 2 months, and Rock ID monthly. Most recently, e was updated on October 19, 2026 and Rock ID on October 23, 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.*