# Rockd vs Underfoot

The clearest difference is in-app purchases: Rockd at none against Underfoot's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Underfoot sells 2 in-app purchases, starting at $2.99 per month. Rockd asks for nothing beyond the download.

## The numbers

| Metric | Rockd | Underfoot |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (185 ratings)](https://appshunter.io/ios/app/rockd/id1153056624/reviews)** | — |
| Number of ratings | **185** | — |
| Positive reviews | 73.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | — |
| Size | 259 MB | 100 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [University of Wisconsin-Madison Shared Apps](https://appshunter.io/developer/908478605) | [Jason Brannon](https://appshunter.io/developer/1868090060) |

## 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


### Underfoot

[App page](https://appshunter.io/ios/app/underfoot-bug-field-guide/id6786962032)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Underfoot Pro | $2.99 | per month |
| Underfoot Pro Annual | $24.99 | per year |


## Frequently asked questions

### Is Rockd free?

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

### Is Underfoot free?

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

### Do Rockd or Underfoot have ads?

Neither Rockd nor Underfoot shows ads.

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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.*