Merge HoloGlobe
Merge
Explore Earth's data in 3D
Explore real-time satellite data and simulations of Earth's systems using a Cube. Rotate 3D models of the planet, view atmospheric layers, and track weather patterns.
Apps Like CitSci for iPhone and iPad
CitSci screenshots
Ranked alternatives
Showing 101–120 of 1,000 ranked alternatives.
GLOBE Observer
NASA
Observe weather and share data
Track environmental observations like cloud cover, land cover, and mosquito habitats. Submit data for scientific research. Access educational resources and learn about Earth systems. Share observations with the global community.
StraboField
The University of Kansas
Record data, capture photos, create maps
Record geological observations with spatial data collection using points, lines, or polygons. Capture photos and sketches. Create maps and stratigraphic sections. Use high-resolution image basemaps and nested Spots for multi-scale data management.
US Citizenship Test : 2025
S Mehta
Prepare for the civics with practice questions
Prepare for the American Civics by studying 100 official questions. Practice answering up to 10 questions at a time. Review categories including American Government, History, and the Constitution. Track progress and review incorrect answers.
Canadian Citizenship (2026)
Wei Zhang
Practice tests and study guides
Practice for the test with 20 multiple-choice questions in a 30-minute session. Review answers and explanations after each attempt. Track progress over time and access study materials for key topics.
Rockd
University of Wisconsin-Madison Shared Apps
Explore rocks, log findings, share observations
Explore geologic features and learn about rock formations. Access location-based summaries and global geologic maps. Document observations and track your geologic journey. Contribute findings and view detailed geological information.
AirNow - Real-time Air Quality
David Azancot
Monitor air and forecast pollution levels
Monitor air with data and forecasts. View AQI, PM2.5, PM10, NO2, O3, SO2, and pollen levels. Access four-day forecasts and pollution trends. Track changes over time and receive updates on local air conditions.
How we rank alternatives
Apps are ranked by functional similarity, category fit, rating confidence, and popularity.