Hmm if I were to use this I'd want it synced with my desktop (self hosted). I don't spend so much time on the tiny screen of my phone. When I'm at home or the office I have glorious 24" displays and real keyboards so I just use those. It wouldn't work if the phone is the only way to get to this.
Also I'd want it to connect to my messaging apps so I don't have to tell it when I connected with someone. I have better things to do than keeping logs up to date. I have all my messaging apps integrated into a self hosted matrix instance.
But it's a nice idea especially with ADHD.