@CStamp @evacide I think this is one of those cases where it's fundamental to use stuff that is open and that stores data strictly on your device. We use Periodical (https://arnowelzel.de/en/projects/periodical), which is a bit barebones but does the job; Drip (https://bloodyhealth.gitlab.io/) also is open and all-local and seems to be the much more refined, but we never tried it.
@cvtsi2sd @evacide I've never understood using an app for stuff like that, and these days, it seems dangerous in some countries. If folk feed the need, learning to be safe with it is important.