# HelloPCM vs Rock ID

The clearest difference is in-app purchases: HelloPCM at none against Rock ID's 3. HelloPCM also leads on update cadence (weekly vs monthly) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Rock ID sells 3 in-app purchases, starting at $4.99 per 7 days. HelloPCM asks for nothing beyond the download.

HelloPCM ships an update weekly, Rock ID monthly. The most recent releases landed on October 14, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HelloPCM | Rock ID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rock-id-gem-and-crystal-scan/id6775267906/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 26 MB | 23 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [GroundControl BV](https://appshunter.io/developer/1460562399) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### HelloPCM

[App page](https://appshunter.io/ios/app/hellopcm/id6766480853)

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

**In-app purchases:** none


### Rock ID

[App page](https://appshunter.io/ios/app/rock-id-gem-and-crystal-scan/id6775267906)

Identify rocks and minerals by taking a photo. Get detailed profiles with geological data, learn about different categories, and save your finds to a personal collection. Works offline and prioritizes user privacy.

**Highlights:** Photo identification of rocks and minerals, Ranked matches with confidence scores, Detailed specimen profiles, Offline functionality, Personal collection of finds, Mohs hardness scale and luster glossary

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Yearly | $24.99 | per year |
| Lifetime Pro | $49.99 | one-time |


## Frequently asked questions

### Is HelloPCM free?

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

### Is Rock ID free?

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

### Do HelloPCM or Rock ID have ads?

Neither HelloPCM nor Rock ID shows ads.

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

HelloPCM ships an update weekly, and Rock ID monthly. Most recently, HelloPCM was updated on October 14, 2026 and Rock ID on October 31, 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.*