To its own, separated address
Then you are done quickly: Brewbuddy now lives at its own address, where you will always find the latest version. You can skip everything below about backups โ that is only for people who were already using the app at this address.
Go straight to Brewbuddy โUntil now Brewbuddy lived at the same web address as the rest of the Bossche Brouwers website. To a browser that is one and the same place: anything running there can reach the same stored data. On its own subdomain the app stands alone, cleanly separated from the rest.
Your recipes and batches live in your browser's storage, and that storage belongs to the web address. Open the new address and you will find an empty app. Your data is not lost โ it is still at the old address โ but you have to bring it across yourself. Three steps.
Remove the old shortcut and add it to your home screen again from the new address. Otherwise you will keep opening the old one.
Do step 1 anyway. A backup never hurts, and you will need one whenever you switch devices.