Texas Invaders vs Rockd
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Texas Invaders
This program empowers citizen scientists to report invasive plant species observations using a specialized kit. It aims to build a geographical database of known and potentially invasive plants to track their arrival and dispersal.
- Species observation collection
- Invasive species reporting
- Geographical database
- Early detection and reporting kit
- Distributional information
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The Invaders of Texas Citizen Science program collects species observations from volunteer "citizen scientists" trained to use a specially developed Invasive Species Early Detection and Reporting Kit. With this kit, volunteers detect invaders' arrival and dispersal in their own local areas. The purpose of this database is to provide geographical locations and distributional information for known and "potentially" invasive plant species.
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 rating: Rockd at 4.4 against Texas Invaders's 3.9. Rockd also leads on ratings volume (185 vs 7) and review sentiment (74% vs 60%). Texas Invaders's advantage is iOS requirement (12.1 vs 16.6). On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Rockd holds the better App Store score, 4.4 against 3.9. That said, the two scores are not equally well evidenced: Rockd has 185 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 60% of Texas Invaders's written reviews are positive against 74% of Rockd's.
Texas Invaders ships an update every 2 months, Rockd every 3 months. The most recent releases landed on September 18, 2026 and October 13, 2026 respectively.
| Parameter | Texas Invaders | Rockd |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (7 ratings) | 4.4 (185 ratings) — better |
| Positive reviews | 60.0% of reviews | 73.6% of reviews — better |
| Number of ratings | 7 | 185 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.1 — better | 16.6 |
| Further details — not scored | ||
| Size | 30 MB | 259 MB |
| Age rating | 4+ | 4+ |
| Developer | Charles T. Bargeron | University of Wisconsin-Madison Shared Apps |
Customer experience
Texas Invaders
Rockd
Bugs and requests
Texas Invaders
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
Texas Invaders
No in-app purchases
Rockd
No in-app purchases
Questions
Is Texas Invaders free?
Is Rockd free?
Which has better reviews, Texas Invaders or Rockd?
Do Texas Invaders or Rockd have ads?
Which is updated more often, Texas Invaders or Rockd?
Other comparisons
