204+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our geyser observation and study association list covers 204+ iPhone apps updated through May 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.1★ (14) | No | No | May 2026 |
| 2 |  | Free | 4.7★ (1.6K) | No | Yes | Aug 2026 |
| 3 |  | Free | 4.6★ (97K) | No | No | Aug 2026 |
| 4 |  | Free | 4.6★ (7.6K) | No | Yes | Aug 2026 |
| 5 |  | Free | 4.9★ (119K) | No | No | Aug 2026 |
| 6 |  | $3.99 | 5.0★ (2) | No | No | May 2026 |
| 7 |  | Free | 4.8★ (15K) | Yes | No | Aug 2026 |
| 8 |  | Free | 4.8★ (5.8K) | Yes | No | Aug 2026 |
Access a comprehensive database of geyser eruption and observation data. Explore daily activity, plan your visits with predictions, and contribute your own observations. Watch live geyser webcams and learn about these natural wonders.
Connect with millions globally to study together remotely. Track your progress, set daily goals, and join or create study groups. Visualize your achievements with detailed statistics and compete with others through real-time rankings.
Access mobile lift tickets, interactive trail maps with real-time lift wait times, and personalized skiing/snowboarding stats. Stay updated on mountain conditions, access resort charge, and get direct ski patrol assistance.
This app transforms your smartphone into a thermal imaging device when connected to a compatible camera. It helps identify hidden issues like water damage, electrical faults, and HVAC problems with advanced visual enhancements and measurement tools. Document and share your findings easily.
Explore over 420 national parks with interactive maps, self-guided tours, and essential on-the-ground information. Plan your visit with details on amenities, operating hours, and fees. Download park content for offline use, ensuring access even without internet service.
Explore Yellowstone's Upper Geyser Basin with detailed information on over 40 geysers. Includes an offline map and eruption predictions for regularly erupting geysers to enhance your visit.
Access over 150 million scientific publications and connect with millions of researchers worldwide. Stay updated on new research in your field, track your academic stats, and download full-text articles for offline reading.
Access over 5,000 free video and audio courses across a vast range of subjects, complete with over 60,000 exercises. Earn a free, valid certificate upon completion, shareable on professional networks. AI-powered study plans and job matching are also available.
This app lets study participants manage their activity and track rewards directly from their mobile device. It offers a convenient way to stay engaged with research studies without needing to access a web portal.
This system enables electronic collection and collation of hand hygiene and personal protective equipment metrics. Observers can customize data collection for their facility, including locations, job roles, and hand hygiene protocols. It provides immediate feedback and performance results.
This app transforms off-the-shelf devices into test units without rooting. It enables network performance monitoring, load testing, and device benchmarking, functioning as a component of a larger testing system.
Explore Yellowstone National Park with a self-guided audio tour. Discover geysers, waterfalls, wildlife, and the park's history with location-aware narration. Enjoy offline access and the freedom to travel at your own pace.
Stay informed about seismic and volcanic activity worldwide with real-time alerts, detailed maps, and historical data. Track earthquakes, volcanic eruptions, and tsunamis from over 30 trusted sources. Customize notifications and explore rich visualizations.
Capture precise, location-aware data in the field using smart forms, even offline. Seamlessly sync collected information with your ArcGIS platform for real-time analysis and decision-making. Ideal for public feedback, inspections, and documenting field conditions.
This app supports measurements for refrigeration, HVAC, and heating systems. It also aids in food safety, frying oil quality, and indoor climate monitoring. Quickly interpret data, create digital reports with photos, and send them via email.
Prepare for your EPA 608 certification with hundreds of up-to-date practice questions. The app offers both a practice mode and a timed test mode with detailed review to help you identify areas needing improvement across Core, Type I, Type II, and Type III exams.
This tool helps outdoor workers stay safe by providing real-time heat index information and hourly forecasts specific to their location. It offers occupational safety recommendations and details on heat-related illnesses and their first aid.
Unlock your phone's sensors for scientific exploration. Conduct pre-built experiments or create your own using accelerometers, magnetometers, and more. Analyze and export data in various formats for further study.
Contribute to real scientific research by making environmental observations. Document clouds, mosquito habitats, land cover, and trees using your mobile device. Your data supports scientists worldwide, including NASA and NOAA.
Monitor indoor and outdoor temperatures in real time with detailed historical data and trend charts. Track temperatures from multiple locations simultaneously and access basic environmental data and converters.