I'm using
BetterPlane right now. It replaced my Excel spreadsheet, and I like it a lot.
(Full disclosure, I am a beta tester and get access to the app through that rather than a subscription, but I am not paid or have any affiliation other than as a tester.)
BetterPlane is working out very well for me. The developer, Jason Gould, is very active and responsive to new feature requests and bug reports. He started the app as a logbook digitizer, and it grew from there, so one of the standout features is making your logbooks searchable. It only took about 15 minutes to scan all my logbooks from 1978 to date, and the system then OCR'ed them and made them searchable, even the handwritten early entries. Very accurate, and now I can search for a phrase like "ELT Battery" and it locates all of the entries and pulls up the actual logbook page. Importantly, however, this does NOT replace the written log entries like a Foreflight log does for flights.
The app also has an annunciator function where you can enter any item and due times or dates. You update your tach or Hobbs times, and the app then tracks and warns you as the items approach their times. I track my registration, annual, engine time, prop time, spar inspection, magnetos, ELT batteries, Aspen batteries, Oil change, altimeter, and transponder certs.
Take a look and see if it's what you were looking for.