# e vs Rock Identifier

The clearest difference is rating: Rock Identifier at 4.3 against e's 3.0. Rock Identifier also leads on ratings volume (6 vs 2). e's advantage is monetization model (free vs free with in-app purchases) and update cadence (every 2 months vs every 11 months). On price, ads, in-app purchases and device support 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 Identifier sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Rock Identifier holds the better App Store score, 4.3 against 3.0. Both are backed by a comparable volume of ratings — 2 and 6 respectively.

e ships an update every 2 months, Rock Identifier every 11 months. The most recent releases landed on October 19, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | e | Rock Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/e-rocks/id1479976121/reviews) | **[4.3 (6 ratings)](https://appshunter.io/ios/app/rock-identifier-geolens/id6748325357/reviews)** |
| Number of ratings | 2 | **6** |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 11 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 52 MB | 62 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mark Wrigley](https://appshunter.io/developer/1479976120) | [Fabulous Apps LLC](https://appshunter.io/developer/1830879287) |

## 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 Identifier

[App page](https://appshunter.io/ios/app/rock-identifier-geolens/id6748325357)

Instantly identify rocks and minerals using your phone's camera. Get detailed information, ask an AI expert questions, and build a personal collection of your finds. Perfect for geology enthusiasts of all levels.

**Highlights:** Instant camera scanning for rock identification, Detailed profiles with hardness and value estimates, AI chat expert for geology questions, Personal collection library with timestamps, Confidence scores for identifications

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rock Identifier - Weekly | $5.99 | per 7 days |
| Rock Identifier - Yearly | $29.99 | per year |


## Frequently asked questions

### Is e free?

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

### Is Rock Identifier free?

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

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

Rock Identifier is rated higher. e averages 3.0 out of 5 from 2 ratings, while Rock Identifier averages 4.3 from 6 ratings.

### Do e or Rock Identifier have ads?

Neither e nor Rock Identifier shows ads.

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

e ships an update every 2 months, and Rock Identifier every 11 months. Most recently, e was updated on October 19, 2026 and Rock Identifier on October 24, 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.*