Explore, learn about, and document your geologic surroundings! Whether you are a professional geoscientist or curious about the rocks around you and the stories they tell, Rockd allows you to explore and learn about the geologic record, contribute your own observations, and log your journey through the geologic record.

- Instant access to geologic and geographic summaries of your current location via a Dashboard
- Interactive global access to more than 200 geologic maps, with more being added weekly
- See your past location and explore paleogeographic maps from C.R. Scotese and GPlates
- Explore published literature containing mentions of mapped geologic units (when available) via GeoDeepDive
- Elevation data for most points on Earth from digital elevation models (DEMs)
- Add your own field observations even offline; tag features from Macrostrat and the Paleobiology Database
- Record strike/dip or trend/plunge for geologic features, using your phone's compass
- Track your progress through the geologic record privately, or share it with others
- See the public activity of other users and share your own and other public checkins using unique URLs

Rockd is produced by the Macrostrat lab in the Department of Geoscience at the University of Wisconsin - Madison. Support provided by the National Science Foundation (NSF) and the Dept. of Geoscience.

Experiencing issues? Send an email to and we will do our best to help you resolve it.

What’s New

Version 2.6.0

+ Curious what kind of fossils are nearby? New taxa summary on the dashboard provides insight using the Paleobiology Database
+ Bug fixes

Ratings and Reviews

4.5 out of 5
57 Ratings

57 Ratings

ReverendQ ,

Gets more amazing with each update

I downloaded this when it first came out, and while it was fun right out of the gates, it was pretty clunky with much room for improvement. Well, the developers have heard the feedback and consistently added new features and are always fixing small bugs to make this the best (and only) “geological social media” app available! Anyone from a casual rockhound to a geology student (which I was when I first started using it, now have my B.Sc.) to PhD researchers can use this, and every checkin added by users helps supplement the amazing amount of data already built into the app. I love the recent additions of paleomaps, the ability to click through to linked literature in professional journals, and the interaction with other rock nerds!

I look forward to whatever is coming next, but at the moment this app is top-notch and I struggle to recommend any new features or fixes.

bl0wdr0*24s ,

This lets amateur geologists have fun

I moved to an area whose geological history helped create earth and life as we now know it. I’ve spent a lot of time exploring and became a real amateur geologist. This app is perfect. First, it has convenient, high quality geological maps. I’ve tried other solutions, which are usually overlays in google earth or a hiking app. They’re pretty inconvenient and they don’t give you the detailed information Rockd does about different stratigraphic units and lithologies. The paleo maps are fun and help make sense of the landforms as you explore. The minerals reference is fun, especially because Rockd actually gives you the mineralogy of igneous rocks in the area.

Pa Driller ,

Drillers helper

I love this app, it enhances some of the knowledge I currently have for our Drilling projects. The only thing is I can no longer look up locations. I type in an address or state or country and nothing happens. I have to go to maps and scroll around to get where I want to be. Any help would be greatly appreciated.


University of Wisconsin-Madison Shared Apps
157.3 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like