# Rockd vs Earthtunes

The clearest difference is rating: Earthtunes at 5.0 against Rockd's 4.4. Rockd's advantage is ratings volume (187 vs 7). 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.

Earthtunes holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Rockd has 187 ratings behind it against 7, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 21, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Rockd | Earthtunes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (187 ratings)](https://appshunter.io/ios/app/rockd/id1153056624/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/earthtunes/id1529159097/reviews)** |
| Number of ratings | **187** | 7 |
| Positive reviews | 73.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Free | Free |
| Size | 259 MB | 20 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [University of Wisconsin-Madison Shared Apps](https://appshunter.io/developer/908478605) | [Northwestern University](https://appshunter.io/developer/348646676) |

## 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


### Earthtunes

[App page](https://appshunter.io/ios/app/earthtunes/id1529159097)

Explore the Earth's hidden sounds by amplifying low-frequency seismic waves. This app transforms inaudible geological vibrations into audible pitches, offering a unique auditory experience of our planet's inner workings. Discover the fascinating acoustic phenomena generated by environmental sources and seismic events.

**Highlights:** Listen to inaudible seismic waves, Amplify low-frequency sounds, Experience Earth's geological vibrations, Understand seismic wave origins, Fascinating auditory exploration

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

**In-app purchases:** none


## Frequently asked questions

### Is Rockd free?

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

### Is Earthtunes free?

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

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

Earthtunes is rated higher. Rockd averages 4.4 out of 5 from 187 ratings, while Earthtunes averages 5.0 from 7 ratings.

### Do Rockd or Earthtunes have ads?

Neither Rockd nor Earthtunes shows ads.

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

Rockd ships an update every 3 months, and Earthtunes every 3 months. Most recently, Rockd was updated on October 21, 2026 and Earthtunes on October 10, 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.*