# Rockd vs Durango Public Library Catalog

The clearest difference is review sentiment: Rockd at 74% against Durango Public Library Catalog's 0%. Rockd also leads on rating (4.4 vs 3.4) and ratings volume (187 vs 5). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rockd holds the better App Store score, 4.4 against 3.4. That said, the two scores are not equally well evidenced: Rockd has 187 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 74% of Rockd's written reviews are positive against 0% of Durango Public Library Catalog's.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Rockd | Durango Public Library Catalog |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (187 ratings)](https://appshunter.io/ios/app/rockd/id1153056624/reviews)** | [3.4 (5 ratings)](https://appshunter.io/ios/app/durango-public-library-catalog/id1526328296/reviews) |
| Number of ratings | **187** | 5 |
| Positive reviews | **73.6% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | Free |
| Size | 259 MB | 29 MB |
| Requires iOS | 16.6 | **16.2** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [University of Wisconsin-Madison Shared Apps](https://appshunter.io/developer/908478605) | [City of Durango (Durango Public Library)](https://appshunter.io/developer/1526328298) |

## What reviewers say

### 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


### Durango Public Library Catalog

[App page](https://appshunter.io/ios/app/durango-public-library-catalog/id1526328296)

Manage your library account on the go. Search the catalog, place holds, and renew borrowed items directly from your mobile device.

**Highlights:** Manage library account, Search catalog, Renew books, Reserve books, Access from mobile device

**In-app purchases:** none


## Frequently asked questions

### Is Rockd free?

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

### Is Durango Public Library Catalog free?

Durango Public Library Catalog is free to download, with no in-app purchases.

### Which has better reviews, Rockd or Durango Public Library Catalog?

Rockd is rated higher. Rockd averages 4.4 out of 5 from 187 ratings, while Durango Public Library Catalog averages 3.4 from 5 ratings.

### Do Rockd or Durango Public Library Catalog have ads?

Neither Rockd nor Durango Public Library Catalog shows ads.

### Which is updated more often, Rockd or Durango Public Library Catalog?

Rockd ships an update every 3 months, and Durango Public Library Catalog every 3 months. Most recently, Rockd was updated on October 21, 2026 and Durango Public Library Catalog on October 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*