About
DoseDiary is a progressive web app built by a solo developer who is themselves a GLP-1 user. Its standout feature is a pharmacokinetic medication concentration tracker that models how GLP-1 medication levels build and diminish in the body using half-life estimates and your actual dosing data — a feature few competitors offer, especially for free.
The app also includes a data importer for migrating from other trackers, a unified timeline showing injection logs and weight entries together, and both side-effect and positive-effect logging. It supports semaglutide, tirzepatide, and liraglutide medication families. As a PWA, it works on any device with a browser and can be installed to the home screen without an app store.