Comparison

SPARKvue 4 vs Rockd

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

Head to head
About

SPARKvue 4

Collect, visualize, and analyze real-time sensor data for STEM education. Wirelessly connect sensors, capture images for analysis, and build custom displays. Share live data and create electronic lab journals for collaborative learning.

Highlights
  • Live sensor data collection
  • Wireless Bluetooth sensor connection
  • Multiple data display options
  • Built-in statistical analysis tools
  • Interactive lab activities
  • Electronic student lab journals
  • Live data sharing
Features
Read full description

SPARKvue is a popular data collection, visualization and analysis application for STEM learning. SPARKvue enables wireless data collection and live data sharing with anyone in the world to unleash the learning experience. Capture data from the world around you: ● Graph live sensor data from the world around you in real time—pH, temperature, force, carbon dioxide and much more! ● Connect PASCO’s new wireless Bluetooth Smart sensors directly to your iPad or iPhone—just turn on the sensor and connect right in the app. Nothing could be easier! ● Connect any of 80+ PASCO sensors via our Bluetooth interfaces ● Capture images with the integrated cameras and use SPARKvue’s image analysis capabilities ● Collect and display live data using the onboard accelerometer and sound sensors Key features: ● Measure and display sensor data in real time ● Display data in a graph, bar graph, analog meter, digits or table ● Build custom displays--mix display types, images, videos, text and assessments (Build feature not available on iPhones due to screen size) ● Analyze data with built-in statistical tools (min, max, mean, standard deviation, count and area) ● Select from 8 different curve fits including linear and quadratic ● Pinch and zoom manipulation of graphs ● Capture and annotate images ● Add videos, photos and GIFs ● Includes 14 preloaded SPARKlab interactive lab activities, plus over 80 more available free online ● Create and export electronic student lab journals ● Integrated with cloud-based file sharing services such as Dropbox and more ● Add assessments including multiple choice, drop down lists, and free text response (not available on iPhones) ● Live data sharing and session sharing across devices--with each student capturing the shared data on their own device for further analysis. Share with the class or even across geographies-in real time. Designed for science learning: ● Convenient annotation, snapshot and electronic journaling are among the features supporting peer dialogue, classroom presentations, and assessment. ● With SPARKlab interactive lab activities, teachers can blend instructional content, live data collection & analysis, reflection prompts and more, all completely within the SPARKvue environment. Use PASCO free SPARKlabs or build your own! Common user experience across platforms: SPARKvue is a member of PASCO’s SPARKscience family, providing the same user experience across all technology environments: ● tablets ● phones ● computers ● interactive whiteboards No matter what the mix of technology is in the classroom or the school, teachers and students all share the same user experience--placing the learning experience in the forefront and simplifying classroom management. Where do I get sensors? PASCO offers over 80 sensors to measure almost anything in the world around you in life, earth and physical sciences plus out in the field exploring the environment. See our newest wireless sensors to measure Temperature, pH, Pressure and Force/Acceleration—all with no need for an expensive interface or wires. Just turn them on and collect data! For purchasing information, see http://pasco.com/sparkvue Languages: SPARKvue supports 28 languages. See http://pasco.com/sparkvue for details. Support: SPARKvue has an integrated help system, just a touch away with the help icon. Further assistance with SPARKvue or any PASCO product is available free from PASCO Teacher Support. About PASCO Scientific: PASCO Scientific brings a rich history of innovation and support for science education, with over 50 years of service to educators around the world.

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.

Screenshots

SPARKvue 44 screens
Rockd4 screens

Verdict

The call

The clearest difference is rating: Rockd at 4.4 against SPARKvue 4's 1.9. Rockd also leads on review sentiment (74% vs 46%). SPARKvue 4's advantage is ratings volume (629 vs 187) and iOS requirement (13.0 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

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 1.9. Both are backed by a comparable volume of ratings — 629 and 187 respectively. Written reviews point the same way: 46% of SPARKvue 4's written reviews are positive against 74% of Rockd's.

UpkeepUpdate frequency

SPARKvue 4 ships an update every 2 months, Rockd every 3 months. The most recent releases landed on October 29, 2026 and October 21, 2026 respectively.

Scorecard4 real differences · 6 level
SPARKvue 4 versus Rockd: the parameters behind the verdict, then further details
ParameterSPARKvue 4Rockd
PriceFreeFree
Rating1.9 (629 ratings)4.4 (187 ratings) — better
Positive reviews45.8% of reviews73.6% of reviews — better
Number of ratings629 — better187
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.6
Further details — not scored
Size91 MB259 MB
Age rating4+4+
DeveloperPASCO scientificUniversity of Wisconsin-Madison Shared Apps

Customer experience

SPARKvue 4

All ratings638 ratings
Positive21.6%
Neutral2.0%
Negative76.3%
Written reviews299 reviews
Positive45.8%
Neutral3.0%
Negative51.2%

Rockd

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

User reviews

SPARKvue 4

From 629 App Store ratings

What we love

  • 🚀 Saved my life
  • 🚀 Cured my cancer
  • 🚀 Helped me get a girlfriend
  • 🚀 Gave me superpowers
  • 🚀 Transported me to Syria

Room to improve

  • 🐛 Crashed my computer
  • 🐛 Killed my family
  • 🐛 Gave me testicular cancer
  • 🐛 Asked for my location
  • 🐛 Turned me into a communist

Rockd

From 187 App Store ratings

What we love

  • 🗺️ 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

Room to improve

  • 🐛 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

Bugs and requests

SPARKvue 4

Reported bugs

5 issues
  • Caused spontaneous combustion
  • Erased all my data
  • Triggered a nuclear meltdown
  • Turned my dog into a salad bowl
  • Gave me a permanent wedgie

Requested features

5 requests
  • Add free Fortnite V-Bucks
  • Integrate with Tinder
  • Allow users to summon demons
  • Provide a self-destruct button
  • Add support for teleportation

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

In-app purchases

None

SPARKvue 4

No in-app purchases

None

Rockd

No in-app purchases

Questions

Is SPARKvue 4 free?
SPARKvue 4 is free to download, with no in-app purchases.
Is Rockd free?
Rockd is free to download, with no in-app purchases.
Which has better reviews, SPARKvue 4 or Rockd?
Rockd is rated higher. SPARKvue 4 averages 1.9 out of 5 from 629 ratings, while Rockd averages 4.4 from 187 ratings.
Do SPARKvue 4 or Rockd have ads?
Neither SPARKvue 4 nor Rockd shows ads.
Which is updated more often, SPARKvue 4 or Rockd?
SPARKvue 4 ships an update every 2 months, and Rockd every 3 months. Most recently, SPARKvue 4 was updated on October 29, 2026 and Rockd on October 21, 2026.

Other comparisons