Jaime I use Notes from Simple Mobile Tools. You can download it from GitHub. In particular I like the check list option. I also use their calendar which will import ICS calendar events. And I use their voice recorder as I can't figure out how to use the GOS "Record Call" as just a recording app while not in a call. None of the apps have, or require, permissions to really anything. (Calendar needs permission to notifications to provide alerts to upcoming events if you want. Voice Recorder needs access to the microphone. No permissions on Notes.)
Hope this helps.