Percent tells you how full the tank is. Watt-hours tell you how far it goes. The Trailhead reads your battery's real remaining energy, runs your planned loop through a terrain-aware model trained on your riding, and answers the question you actually have: which assist mode gets me home with reserve to spare?
The Trailhead. Four readiness checks fill in seconds after you open the app — then the day's real answer.
Most range numbers are marketing. OpenLevo's is a physical model — watt-hours per mile, bucketed by gradient and assist mode — personalized by your actual recorded rides, never by fleet averages in a cloud.
The same model runs live in the Cockpit. At any moment it can tell you what another lap costs in each mode from the watt-hours you have right now — so the last climb of the day is a decision, not a gamble.