170+ iOS apps curated and reviewed
The best usgs volcano apps on iPhone average 4.6★ across 170+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.
Discover and track volcanoes worldwide with real-time alerts and information on recent volcanic activity. Stay informed and explore volcanic events around the globe.
Stay informed about recent volcanic activity with daily news and reports from top sources, including updates on alert levels, aviation codes, and current activity. Download the app now to get the latest information on volcanic eruptions and activity around the world.
Explore 420 national parks effortlessly with interactive maps, self-guided tours, amenity information, and essential trip planning tools. Accessible offline, inclusive features, and sharing options make it the ultimate National Park companion. Start your adventure now!
Discover and explore information about volcanoes worldwide with our interactive app. Stay informed about volcanic activity, browse eruption histories, and receive real-time updates. Download now to unlock a world of volcanic knowledge at your fingertips!
Receive real-time earthquake alerts and view a visual map displaying earthquake locations worldwide. Stay informed and prepared with this app.
Get real-time earthquake notifications and updates tailored to your location and preferences. Stay informed and prepared with this essential app. Sign up now for peace of mind.
Track earthquakes worldwide with real-time alerts, maps, and information. Stay informed and prepared for seismic activity globally. Download now for instant earthquake updates.
Explore maps offline with Avenza Maps for GPS tracking, hiking, and off-road adventures. Never get lost with this handy offline mapping tool.
Discover and navigate hiking, overlanding, and camping trails with Gaia GPS. Use this app for offline maps, GPS navigation, and distance tracking in the wilderness. Start exploring today!
Access high-resolution maps of National Park Service parks and US Geological Survey topography quadrangles in Montana, Idaho, and Wyoming on your iPhone and iPad for GPS and offline use with this invaluable app. Perfect for road trips, hikes, camping, and exploration, download maps for offline use, view your location in real-time, and seamlessly integrate with Apple Maps for easy navigation. Unlock unlimited map downloads with a subscription to enhance your outdoor adventures.
Monitor water levels of rivers using real-time data from sensors placed at various points along the river. Receive notifications for any significant changes in water levels to help users make informed decisions about potential flooding or water-related events. Stay informed and prepared with River Levels!
Discover breathtaking landscapes and plan your outdoor adventures with detailed topographic maps featuring terrain contours, elevation data, trails, and points of interest. Unlock the beauty of nature and navigate with ease. Start exploring today!
Explore new places, plan routes, and navigate with ease using an intuitive mapping application. Seamlessly track your location, save favorite spots, and discover points of interest with advanced features. Download now for a smoother travel experience.
Get real-time information on the latest earthquakes worldwide with the top-rated app. Stay informed and stay safe with QuakeWatch!
Discover and explore off-road trails with detailed maps, GPS navigation, and land ownership information. Find new locations, track your adventures, and stay connected with fellow outdoor enthusiasts. Download now to start your next off-road journey!
Stay informed about recent earthquakes worldwide with real-time updates, maps, and news articles on seismic activity. Track earthquakes in your area and stay prepared. Download now for live quake alerts and safety tips.