Thanks so much for this! It’s exactly the kind of think I’ve looked for many times. There are slick alternatives that I abandoned due to their (to me) insane pricing models, like “add a few friends for free, then unlock unlimited friends for only $20/mo!” I get that they want to make money, but I’m not paying hundreds per year to remember to call my sister.
The main competitor here is plain old Reminders, or OmniFocus, or any other task manager. A repeating reminder to text that cool coworker you want to stay in touch with isn’t as shiny, but it gets the job done.
I don’t know if there’s an Apple API for getting metadata about recent calls and texts, but that would be the final piece for me: if I texted Joe yesterday, reset the timer on his reminder. I wouldn’t touch that idea with a ten foot pole for other apps, but your privacy policy of “everything you do stays on your own device and we see none of it” is perfect and compatible with the feature.
So, nice job, and thanks for sharing!