Normal changes save automatically
Tasks, notes, lists, appointments, routines, plans and other app records are written to the app data store as you save or change them. You do not need a separate master Save button after normal edits.
The browser keeps a local copy so the app can reopen with the progress you already made on that device.
Browser saving and backups
Right now, Life, Sorted. keeps your changes in this browser. Use Settings to download a full backup. Independent account sync will be added after its backend is verified.
That means the modules are not separate little databases. They are parts of the same Life, Sorted. data set.
Keep one source of truth
Editing an item from Search or Saved takes you back to the original record. That is deliberate: one task, one note, one appointment, one list.
If you move devices before account sync is enabled, export and restore your full backup carefully. Saving on one device does not automatically update another.