OnlyTrails

Contour-line topo maps, GPX import, and a Smart Energy Save navigator that sips battery on long backcountry hikes.

OnlyTrails is a native hiking companion built for the backcountry — real topographic maps with contour lines, offline navigation, and a power system designed to survive an all-day hike.

TOPOGRAPHIC MAPS • OpenTopoMap tiles with true contour lines and hillshade • Trail polylines colored by steepness, plus an elevation profile and grade chart • USGS Topo and standard basemaps included

IMPORT YOUR TRAILS • Open any .gpx file from Files, AirDrop, or another app • Automatic distance, elevation gain/drop, grade, and difficulty

SMART ENERGY SAVE NAVIGATION • Download a trail's tile corridor for true offline maps — no signal needed • Adaptive GPS that drops to coarse between trail forks and uses the motion coprocessor's pedometer to track progress, waking full GPS only at decision points • Eyes-free mode: spoken and haptic fork cues with a near-black glance screen • Battery-vs-ETA budget that escalates power saving as your charge tightens • Off-route alarm and a persisted breadcrumb log for retrace and where-am-I, even offline

COMMUNITY • Share and discover trails • Crowd difficulty voting, reviews, and junction markings (Bee · Thorn · Slippery · Fork) • "What-the-Fork" photos pinned to confusing junctions

Map tiles © OpenTopoMap (CC-BY-SA) and © OpenStreetMap contributors. USGS Topo tiles courtesy of The National Map.