The Field Guide

An offline web app for Yosemite: tappable GPS for the parking turnouts, quiet trailheads, and insider tactics that locals use, built to work at the trailhead when cell service dies. Includes the full stop library across the Valley, Glacier Point and Mariposa Grove, Tuolumne, and Hetch Hetchy, plus a day-by-day trip planner with park programs and weather.

The guide is on sale now: $3.99 once for 18 months of access, no subscription. The journal's free tools cover a lot on their own: the trip planner map, itineraries, and the first-week checklist.