Comparison

Rockd vs Strat Mobile

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Rockd

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
Read full description

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. Features: - Instant access to geologic and geographic summaries of your current location via a Dashboard - Interactive global access to more than 290 geologic maps, with more being added weekly - Explore the landscape with a dynamic, 3D virtual globe - Save maps for use in the field with a built-in map caching system - See your past location and explore paleogeographic maps from C.R. Scotese and GPlates - View Macrostrat stratigraphic columns where available (beta) - Explore published literature containing mentions of mapped geologic units (when available) via xDD (formerly, 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 contact@rockd.org and we will do our best to help you resolve it.

About

Strat Mobile

This application allows geologists to measure and record stratigraphic sections directly on their mobile devices. It offers multiple measurement methods, including using the device's camera or a traditional Jacob Staff, and automatically logs location and time data. Users can define lithology types, view statistics, and see section locations on a map.

Highlights
  • Real-time stratigraphic section plotting
  • Measure sections using device camera or Jacob Staff
  • Automatic recording of location, time, and date
  • Define unlimited lithology types with custom colors
  • Basic statistics on lithology thicknesses and percentages
  • View section locations on satellite or road maps
Features
Read full description

Strat Mobile is a program for iOS devices that enables you to measure and record stratigraphic sections right on your iPhone or iPad. Some of the basic tasks that one can perform with the app include: • Real time plotting of the stratigraphic section as it is being measured. • Measure sections using your know eye height as the “Jacob Staff” by sighting down dip through the device camera. The thickness of the measured interval, of course, depends directly on the dip (as well as your eye height). • Measure sections using a traditional Jacob Staff. The device can determine the strike and dip of the bedding for you with the tap of a button • Measure sections using a tape measure. You enter the tape azimuth, slope, start and end point, as well as the strike and dip of bedding, and the device will calculate the correct thickness automatically. • Automatically record, latitude, longitude, time and date for every interval measured • You can define an unlimited number of lithology types (with corresponding colors and widths) to draw your section and tag your observations • Provide basic statistics on the section measured, including the thicknesses and percentages of each lithology • See the locations of entire sections, measured intervals, and samples on a satellite image or road map. • Provide basic input and output of data using standard iOS conventions Will work on iPhones or iPads. The program will work on iPads lacking a cellular data connection but those devices have fewer sensors and thus cannot be used in automatic data collection mode.

Screenshots

Rockd4 screens
Strat Mobile4 screens

Verdict

The call

The clearest difference is rating: Rockd at 4.4 against Strat Mobile's 1.0. Rockd also leads on ratings volume (185 vs 1). Strat Mobile's advantage is update cadence (monthly vs every 3 months) and iOS requirement (10.0 vs 16.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

Rockd holds the better App Store score, 4.4 against 1.0. That said, the two scores are not equally well evidenced: Rockd has 185 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Rockd ships an update every 3 months, Strat Mobile monthly. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

Scorecard4 real differences · 6 level
Rockd versus Strat Mobile: the parameters behind the verdict, then further details
ParameterRockdStrat Mobile
PriceFreeFree
Rating4.4 (185 ratings) — better1.0 (1 ratings)
Positive reviews73.6% of reviews—
Number of ratings185 — better1
Update frequencyEvery 3 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.610.0 — better
Further details — not scored
Size259 MB8 MB
Age rating4+4+
DeveloperUniversity of Wisconsin-Madison Shared AppsRichard Allmendinger

Customer experience

Rockd

All ratings185 ratings
Positive82.2%
Neutral7.6%
Negative10.3%
Written reviews91 reviews
Positive73.6%
Neutral13.2%
Negative13.2%

Strat Mobile

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Rockd

Reported bugs

17 issues
  • 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
Show 12 more
  • Fossils button not working
  • Map returns to user location after viewing check-ins
  • App crashes and becomes unresponsive
  • Data loss after app reinstall or logout
  • Maps fail to load after recent updates
  • Location search functionality broken
  • Android version windows not visible
  • Straight lines appear when zooming
  • Formations stop at state lines
  • Check-in screen stuck with no exit option
  • App won't load after initial use
  • Geological overlay won't upload to base map

Requested features

16 requests
  • 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
Show 11 more
  • Map legend/key for geological features
  • Spanish language support
  • Ability to move dashboard to different locations
  • Latitude/longitude search functionality
  • Multiple photo attachments per location
  • Strike and dip data visualization
  • Fault line labeling on maps
  • Better Android version compatibility
  • Tutorial or short course for advanced features
  • Black contact lines between formations toggle
  • Personal photo upload focus with mineral variations

Strat Mobile

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Rockd

No in-app purchases

None

Strat Mobile

No in-app purchases

Questions

Is Rockd free?
Rockd is free to download, with no in-app purchases.
Is Strat Mobile free?
Strat Mobile is free to download, with no in-app purchases.
Which has better reviews, Rockd or Strat Mobile?
Rockd is rated higher. Rockd averages 4.4 out of 5 from 185 ratings, while Strat Mobile averages 1.0 from 1 ratings.
Do Rockd or Strat Mobile have ads?
Neither Rockd nor Strat Mobile shows ads.
Which is updated more often, Rockd or Strat Mobile?
Rockd ships an update every 3 months, and Strat Mobile monthly. Most recently, Rockd was updated on October 13, 2026 and Strat Mobile on October 8, 2026.

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