Cold Kills Batteries, Screen Glare Destroys Night Vision: I Built HushHike with Render, ElevenLabs & Mastra to Navigate the Alpine in 30 Seconds

A screenless wilderness dispatcher combining solar ephemeris, Tobler pace kinematics, an indestructible 3x5 index card studio, hands-free ElevenLabs audio dispatch, and Mastra agentic workflows on Render.