# Rock vs Calibrated Risk

The clearest difference is rating: Calibrated Risk at 5.0 against Rock's 4.4. Calibrated Risk also leads on update cadence (every 8 days vs every 3 weeks). Rock's advantage is ratings volume (65 vs 1) and device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Rock sells 3 in-app purchases, starting at $3.99 per 7 days and Calibrated Risk sells 1 in-app purchase, starting at $49.99 per month. Whichever you choose, the download price is not the number that matters.

Calibrated Risk holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Rock has 65 ratings behind it against 1, so its average is the more settled of the two.

Rock ships an update every 3 weeks, Calibrated Risk every 8 days. The most recent releases landed on October 24, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Rock | Calibrated Risk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (65 ratings)](https://appshunter.io/ios/app/rock-scan/id6498787560/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/calibrated-risk/id6791405268/reviews)** |
| Number of ratings | **65** | 1 |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 87 MB | 2 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dovran Muhammetrustemov](https://appshunter.io/developer/1741797293) | [Mile High Compliance LLC](https://appshunter.io/developer/6791405270) |

## What reviewers say

### Rock

[App page](https://appshunter.io/ios/app/rock-scan/id6498787560)

This application allows users to scan and identify rocks and minerals directly from their mobile device. It provides a convenient way to learn about geological samples encountered in everyday life.

**Highlights:** Scan rocks and minerals, Identify geological samples, Mobile identification tool, Learn about rock types

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access Rock-Scan pro weekly | $3.99 | per 7 days |
| Access Rock-Scan pro monthly | $9.99 | per month |
| Access Rock-Scan pro yearly | $59.99 | per year |

**What reviewers like**

- 👍 User-friendly interface
- 🚀 Fast identification
- 💡 Educational content
- 💎 Accurate rock identification
- ✨ Identifies non-rocks

**What reviewers complain about**

- 🐛 Inaccurate information
- 🐛 App doesn't work after update
- 🐛 Identified as pastry/cake/metal/charcoal/pottery
- 🐛 Cannot identify common rocks
- 🐛 Identified as not a rock or mineral

**Reported bugs**

- App doesn't work after update
- Failed to connect
- Identified as not a rock or mineral
- Cannot identify common rocks
- Inaccurate identification of some rocks


### Calibrated Risk

[App page](https://appshunter.io/ios/app/calibrated-risk/id6791405268)

This app replaces guesswork in Job Hazard Analyses with data-driven risk scores. It identifies hazards, maps them to specific standards, and scores risk using real citation rates and injury outcomes for your industry. Get hierarchy-of-controls recommendations and residual risk scoring.

**Highlights:** Hazard identification from task description, Map hazards to CFR standards, Citation rates per CFR and NAICS code, Fatality and hospitalization rates, Risk level scoring, Hierarchy-of-controls recommendations, Residual risk scoring

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Calibrated Risk Pro | $49.99 | per month |


## Frequently asked questions

### Is Rock free?

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

### Is Calibrated Risk free?

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

### Which has better reviews, Rock or Calibrated Risk?

Calibrated Risk is rated higher. Rock averages 4.4 out of 5 from 65 ratings, while Calibrated Risk averages 5.0 from 1 ratings.

### Do Rock or Calibrated Risk have ads?

Neither Rock nor Calibrated Risk shows ads.

### Which is updated more often, Rock or Calibrated Risk?

Rock ships an update every 3 weeks, and Calibrated Risk every 8 days. Most recently, Rock was updated on October 24, 2026 and Calibrated Risk on October 6, 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.*