# Mancos vs Rockd

The clearest difference is price: Rockd at Free against Mancos's $2.99. Rockd also leads on ratings volume (185 vs 13) and iOS requirement (16.6 vs 26.0). Mancos's advantage is rating (5.0 vs 4.4) and chart position (#192 vs unranked). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Rockd is free to download; Mancos costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mancos holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Rockd has 185 ratings behind it against 13, so its average is the more settled of the two. Written reviews complicate that: 70% of Mancos's written reviews are positive against 73% of Rockd's, so the app with the better star average is not the one people write more warmly about.

Mancos ships an update every 4 months, Rockd every 3 months. The most recent releases landed on September 12, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Mancos | Rockd |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (13 ratings)](https://appshunter.io/ios/app/mancos/id541570878/reviews)** | [4.4 (185 ratings)](https://appshunter.io/ios/app/rockd/id1153056624/reviews) |
| Number of ratings | 13 | **185** |
| Positive reviews | 70.0% of reviews | **73.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Best chart rank | **#192** | — |
| Size | 10 MB | 259 MB |
| Requires iOS | 26.0 | **16.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hunt Mountain Software](https://appshunter.io/developer/328710008) | [University of Wisconsin-Madison Shared Apps](https://appshunter.io/developer/908478605) |

## What reviewers say

### Mancos

[App page](https://appshunter.io/ios/app/mancos/id541570878)

**Currently charting:** #192 Top Paid · Education (US App Store)

Explore the geology of the United States and other regions with this app. Access state geological maps, formation data, and stratigraphic columns. Discover local fossil collections directly from your device.

**Highlights:** Interactive geological maps, Searchable by name or GPS, State-level geological data, Geological formation information, Regional stratigraphic columns, Fossil collection discovery

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none


### Rockd

[App page](https://appshunter.io/ios/app/rockd/id1153056624)

Discover and document the geology around you. Access global geologic maps, 3D globes, and detailed summaries of your surroundings. Contribute your own observations and track your exploration of Earth's geologic history.

**Highlights:** Interactive global geologic maps, 3D virtual globe exploration, Field observation logging, Offline map caching, Paleogeographic map access, Stratigraphic column viewing, Geologic literature integration

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

**In-app purchases:** none

**What reviewers like**

- 🗺️ Comprehensive geological maps with detailed information
- 💡 Innovative integration of peer-reviewed references and literature
- 🧭 Built-in Brunton compass and clinometer tools
- 📱 User-friendly interface and intuitive navigation
- 🌍 Global coverage with paleomaps and stratigraphic data

**What reviewers complain about**

- 🐛 Black map display issues in offline and online modes
- 📍 GPS tracking and real-time position updates failing
- 🔌 Offline functionality severely limited or broken
- 🔐 Persistent login requirement without password saving
- ⚠️ Error dialogs that won't dismiss

**Reported bugs**

- Black map display in airplane mode and online
- Persistent error dialogs that cannot be dismissed
- GPS not tracking in real-time
- Offline check-ins not syncing properly
- Sign-up page jumps between fields and login page

**Requested features**

- Follow/friend mechanic to track other users' check-ins
- Rock identification tool from photo uploads
- Offline map download with customizable zoom levels
- Stereonet tool for structural geology
- Groundwater/aquifer information section


## Frequently asked questions

### Is Mancos free?

Mancos costs $2.99, with no in-app purchases.

### Is Rockd free?

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

### Which has better reviews, Mancos or Rockd?

Mancos is rated higher. Mancos averages 5.0 out of 5 from 13 ratings, while Rockd averages 4.4 from 185 ratings.

### Do Mancos or Rockd have ads?

Neither Mancos nor Rockd shows ads.

### Which is updated more often, Mancos or Rockd?

Mancos ships an update every 4 months, and Rockd every 3 months. Most recently, Mancos was updated on September 12, 2026 and Rockd on September 18, 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.*