CalTopo is described as 'Trusted by professional mountain guides, avalanche educators, and search and rescue teams, CalTopo has all the features you need to plan your next off-grid pursuit' and is a Map service in the sport & health category. There are more than 10 alternatives to CalTopo for a variety of platforms, including Android, iPhone, Android Tablet, iPad and Web-based apps. The best CalTopo alternative is CoMaps, which is both free and Open Source. Other great apps like CalTopo are Google Earth, OsmAnd, OsmAPP and HERE WeGo.
Provides detailed offline GPS navigation, 24k topo and satellite maps, custom waypoints, route planning, weather, 650,000+ hiking trails, public land boundaries, slope angles, campsite info, recreational site data, and over 450,000 points of interest for outdoor use.
onX Backcountry is the most popular commercial alternative to CalTopo.
Supports offline vector maps for hiking, cycling, geocaching, boating, off-roading, skiing, and skating. Records tracks in the background, provides activity-specific map modes, elevation contours, hillshades, custom places, and map filtering for clarity and sharing.
Relief Maps is a GPS application focused on outdoor sports, the app is based on an beautiful and high-performance 3D map.
Plan trips and record GPS tracks for free, with the best outdoor app. Browse hiking trail maps, hunting units, and scout offroad camping trips.
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