Dosia is a private, local-first companion for your GLP-1 journey. It unites your injection schedule, estimated medication-level curves (based on published half-life models), weight trajectory, side effect logs with severity and timing, injection-site rotation, and one-tap doctor-ready PDF summaries in one calm timeline. Private by default: on-device storage, no account required, no health data sold. Dosia never gives medical advice; estimates are informational only.