You can delete your SeaLog data whether or not you still have the app installed.
Open SeaLog and go to Settings → Danger Zone → Delete My Data. This immediately erases everything stored on your device and, if your device is synced to a vessel's server, requests deletion of your synced records too. This action cannot be undone.
Email support@getsealog.com from the address you'd like us to respond to, and include:
We'll verify the request and process deletion within 30 days, and confirm by email once it's done.
Data that only ever lived on your own device (tax records, cash ledger, PIN codes) is erased immediately by the in-app option, or the moment you uninstall the app — none of it is collected by us in either case.
Contact support@getsealog.com with anything else about your data.