Get the app
Install it, add your supplements and that is it. No account, no sign-up, nothing to configure.
Android
Supli is on Google Play. Free to download, no account.
Get it on Google PlayWorks on Android 7 and newer.
iPhone
The iOS version is being prepared for TestFlight.
Coming soon.
About your data
Your supplements and doses stay on this phone. If you switch phones, save a backup from Settings first.