I had a separate journal on my phone, but it recently crashed and the developer was no help (think it actually infected my phone with a virus), so I no longer use it (Memories on Android, not sure if it is available on apple, but DON'T use it!!)
Now I just journal on the private blog I had set up for former T (her agency email was not confidential so she did not want to use it). New T does not read it, but even if she did, I could save the journal stuff as private and only leave the stuff I want her to see as PW accessible... it works out pretty well, and I trust the site, so no more virus worries.