Mancos vs Rockd
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mancos
Explore the geology of the United States and other regions with this app. Access state geological maps, formation data, and stratigraphic columns. Discover local fossil collections directly from your device.
- Interactive geological maps
- Searchable by name or GPS
- State-level geological data
- Geological formation information
- Regional stratigraphic columns
- Fossil collection discovery
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Mancos brings the geology of the United States and beyond to your iPhone. Tap the map, search by name, or use GPS to instantly locate yourself, show state-level geological maps, the geological formation and the regional stratigraphic column, all supplied by the servers at earth-base.org. Also view any fossil collections from your region, supplied by paleodb.org.
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.
- Interactive global geologic maps
- 3D virtual globe exploration
- Field observation logging
- Offline map caching
- Paleogeographic map access
- Stratigraphic column viewing
- Geologic literature integration
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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.
Screenshots
Verdict
The clearest difference is price: Rockd at Free against Mancos's $2.99. Rockd also leads on ratings volume (185 vs 13) and iOS requirement (16.6 vs 26.0). Mancos's advantage is rating (5.0 vs 4.4) and chart position (#178 vs unranked). On review sentiment, update cadence, ads and in-app purchases 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
Rockd is free to download; Mancos costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Mancos holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Rockd has 185 ratings behind it against 13, so its average is the more settled of the two. Written reviews complicate that: 70% of Mancos's written reviews are positive against 73% of Rockd's, so the app with the better star average is not the one people write more warmly about.
Mancos ships an update every 4 months, Rockd every 3 months. The most recent releases landed on August 31, 2026 and September 18, 2026 respectively.
| Parameter | Mancos | Rockd |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (13 ratings) — better | 4.4 (185 ratings) |
| Positive reviews | 70.0% of reviews | 73.3% of reviews — better |
| Number of ratings | 13 | 185 — better |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #178 — better | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPad |
| Requires iOS | 26.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 10 MB | 259 MB |
| Age rating | 4+ | 4+ |
| Developer | Hunt Mountain Software | University of Wisconsin-Madison Shared Apps |
Customer experience
Mancos
Rockd
Bugs and requests
Mancos
Not enough reviews yet to summarise bugs or 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
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- 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
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- 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
In-app purchases
Mancos
No in-app purchases
Rockd
No in-app purchases
