I use an App called Daylio [https://daylio.webflow.io/] as a personal diary and mood tracker.

It has a single notification per day which is directly actionable (Asks for your mood for the day).

Data is stored locally on the phone and can be backed up to your iCloud/Google Drive.

I have found this app to be more habit forming in terms of creating a micro-diary, rather than sitting down and jotting thoughts.