# PFI vs Rock Identifier | Scan Stone

The clearest difference is in-app purchases: PFI at none against Rock Identifier | Scan Stone's 2. PFI also leads on iOS requirement (11.0 vs 16.0). On price there is nothing between them.

Both are free to download. Rock Identifier | Scan Stone sells 2 in-app purchases, starting at $6.99 per 7 days. PFI asks for nothing beyond the download.

## The numbers

| Metric | PFI | Rock Identifier | Scan Stone |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (11 ratings)](https://appshunter.io/ios/app/rock-identifier-scan-stone/id6760641960/reviews)** |
| Number of ratings | — | **11** |
| In-app purchases | **No** | Yes |
| Ads | — | Yes |
| Update frequency | — | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 36 MB | 212 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | — | **iPhone** |
| Age rating | 4+ | 4+ |
| Developer | [Intertech co.](https://appshunter.io/developer/952429435) | [MEGA PROJEKT GROUP DOO Nis](https://appshunter.io/developer/1885467538) |

## What reviewers say

### PFI

[App page](https://appshunter.io/ios/app/pfi/id1297926437)

**In-app purchases:** none


### Rock Identifier | Scan Stone

[App page](https://appshunter.io/ios/app/rock-identifier-scan-stone/id6760641960)

Instantly identify rocks, crystals, and gemstones using your phone's camera. Get detailed scientific information, build a digital collection, and learn about the mineral world. Perfect for collectors, geologists, and nature enthusiasts.

**Highlights:** Instant AI-powered rock identification, Detailed scientific information on specimens, Build and manage a digital rock collection, Geology guide with origin and composition, Save identified finds with notes and locations

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 week with 3 days trial | $6.99 | per 7 days |
| 1 week with 3 days trial | $8.99 | per 7 days |


## Frequently asked questions

### Is PFI free?

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

### Is Rock Identifier | Scan Stone free?

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

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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.*