Everything stays on your device. Back up or reset here.
Everything — check-ins, treatments, visits, notes, labs — lives in your browser. Back it up regularly so a cleared cache doesn't lose months of tracking.
Fix my Lyme stores everything in your browser's localStorage. Private browsing, clearing cookies, or switching devices will empty it. Lab photos especially can fill up space fast — export a backup when you accumulate more than 10–20 images.