Get Current Conditions
Put together your own portable forecast service.
BACKPACKER GPS Trails Pro
($5; iPhone, Android; backpacker.com/apps) can overlay five weather maps (Doppler radar, cloud cover, wind, temp, ocean temp) on your trip route ($30/year for weather).
Don’t be surprised by the shifting tides. TideTrac ($3; iPhone, iPad; tidetrac .com) lets you save offline tide tables for any location, then reference them during coastal hikes or paddling trips.
Lay your phone at the angle of the snow and the Mammut Safety app (free; iPhone; mammut .ch/en) uses a clinometer, compass, and altimeter to estimate avy risk—no data connection needed.
POI marker or Waypoint A digital signpost for key points on your map
Offline map A map that doesn’t require a data connection to be viewed
GPX The universal language in which GPS data is saved so it can be shared
Geotagged Media associated with a geographically referenced location