# DiY IEU Library vs Rockd

The clearest difference is iOS requirement: DiY IEU Library at 13.0 against Rockd's 16.6. 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.

DiY IEU Library ships an update every 2 months, Rockd every 3 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | DiY IEU Library | Rockd |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (187 ratings)](https://appshunter.io/ios/app/rockd/id1153056624/reviews)** |
| Number of ratings | — | **187** |
| Positive reviews | — | 73.6% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | — | Free |
| Size | 5 MB | 259 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [INSTITUTO DE EMPRESA SL](https://appshunter.io/developer/504528731) | [University of Wisconsin-Madison Shared Apps](https://appshunter.io/developer/908478605) |

## What reviewers say

### DiY IEU Library

[App page](https://appshunter.io/ios/app/diy-ieu-library/id1074815558)

**Features:** macOS Compatibility

**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 DiY IEU Library free?

DiY IEU Library is free to download, with no in-app purchases.

### Is Rockd free?

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

### Do DiY IEU Library or Rockd have ads?

Neither DiY IEU Library nor Rockd shows ads.

### Which is updated more often, DiY IEU Library or Rockd?

DiY IEU Library ships an update every 2 months, and Rockd every 3 months. Most recently, DiY IEU Library was updated on October 24, 2026 and Rockd on October 21, 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.*