I like to track the last timestamp of when I back up certain things on my computer. My journal is one of those things I want to track so I added this line to my backup function which stores the time in a file.

(write-region (format-time-string "%Y-%m-%d %H:%M\n")
              nil
              "~/.last_journal_backup")

I added a reactive mobile view for my Poker Equity Calculator.