# Stone Identifier vs CEP

The clearest difference is in-app purchases: CEP at none against Stone Identifier's 10. CEP also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Stone Identifier sells 10 in-app purchases, starting at $4.99 per 7 days. CEP asks for nothing beyond the download.

Stone Identifier ships an update every 3 weeks, CEP monthly. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Stone Identifier | CEP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (1.5K ratings)](https://appshunter.io/ios/app/stone-identifier-rock-finder/id1608573202/reviews)** | — |
| Number of ratings | **1.5K** | — |
| Positive reviews | 16.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 185 MB | 49 MB |
| Requires iOS | **16.0** | 16.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [App Holdings](https://appshunter.io/developer/808581339) | [Emily Sudduth](https://appshunter.io/developer/1721274803) |

## What reviewers say

### Stone Identifier

[App page](https://appshunter.io/ios/app/stone-identifier-rock-finder/id1608573202)

Identify rocks, minerals, and crystals from photos with high accuracy. Explore their properties, discover nearby deposits on a map, and build your own digital collection. Learn fascinating facts about stones from around the world.

**Highlights:** Accurate rock identification from photos, Study physical and chemical properties, Discover nearby rock deposits on a map, Create and manage a personal rock collection, Learn about thousands of rock types

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RockPlatinum Weekly | $4.99 | per 7 days |
| RockPlatinum Weekly with Trial | $4.99 | per 7 days |
| RockPlatinum Weekly with Trial | $5.99 | per 7 days |
| RockPlatinum Weekly | $5.99 | per 7 days |
| RockPlatinum Weekly 7day Trial | $5.99 | per 7 days |
| RockPlatinum Monthly Access | $9.99 | per month |
| RockPlatinum Monthly + Trial | $9.99 | per month |
| Rock Seeker Platinum Annual | $29.99 | per year |
| RockPlatinum Annual 3day Trial | $29.99 | per year |
| Rock Seeker Platinum Annual | $39.99 | per year |

**What reviewers like**

- 🤗 Helpful for identifying rocks and minerals
- 🧠 Informative details on specimens
- 👨‍🏫 Educational for students and kids

**What reviewers complain about**

- 🤷‍♂️ Inconsistent and inaccurate identification results
- 💰 Expensive subscription model
- 🔒 Difficult to cancel subscription
- 🙅‍♀️ Limited free usage
- 🤖 Feels like an automated response rather than a knowledgeable app

**Reported bugs**

- App crashes or freezes during use
- Server connection issues prevent identification
- Incorrect or nonsensical identification results

**Requested features**

- Allow manual rock/mineral identification input
- Provide more detailed information on each specimen
- Improve accuracy of identification algorithms
- Offer a one-time purchase option instead of subscription


### CEP

[App page](https://appshunter.io/ios/app/cep-coaching/id6479665470)

**In-app purchases:** none


## Frequently asked questions

### Is Stone Identifier free?

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

### Is CEP free?

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

### Do Stone Identifier or CEP have ads?

Stone Identifier shows ads; CEP does not.

### Which is updated more often, Stone Identifier or CEP?

Stone Identifier ships an update every 3 weeks, and CEP monthly. Most recently, Stone Identifier was updated on November 3, 2026 and CEP on November 8, 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.*