# Rock ID vs Geomaster

The clearest difference is review sentiment: Geomaster at 100% against Rock ID's 37%. Geomaster also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 17). Rock ID's advantage is ratings volume (3.1K vs 4) and update cadence (monthly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Rock ID sells 13 in-app purchases, starting at $4.99 per 7 days. Geomaster asks for nothing beyond the download.

Geomaster holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Rock ID has 3.1K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 37% of Rock ID's written reviews are positive against 100% of Geomaster's.

Rock ID ships an update monthly, Geomaster every 3 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Rock ID | Geomaster |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (3.1K ratings)](https://appshunter.io/ios/app/rock-id-stone-identifier/id6469999508/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/geomaster/id6520384624/reviews)** |
| Number of ratings | **3.1K** | 4 |
| Positive reviews | 37.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 48 MB | 11 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [AIBY](https://appshunter.io/developer/1458102137) | [Jacques Brayel Tchouanmoe](https://appshunter.io/developer/1560440986) |

## What reviewers say

### 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


### Geomaster

[App page](https://appshunter.io/ios/app/geomaster/id6520384624)

This app serves as a comprehensive field and study companion for geology enthusiasts, students, and professionals. It offers integrated geological tools for measurement, reference, and identification, supporting both academic exploration and real-world fieldwork.

**Highlights:** Strike and Dip Compass, Trend and Plunge Compass, Geological Time Scale, Geological Dictionary, Rock Identification Trees, Mineral Classification

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rock ID free?

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

### Is Geomaster free?

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

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

Geomaster is rated higher. Rock ID averages 4.4 out of 5 from 3.1K ratings, while Geomaster averages 5.0 from 4 ratings.

### Do Rock ID or Geomaster have ads?

Neither Rock ID nor Geomaster shows ads.

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

Rock ID ships an update monthly, and Geomaster every 3 months. Most recently, Rock ID was updated on October 27, 2026 and Geomaster on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*