So it's a reader app for what happens on you mac plus a Safari mobile browser extension to record what happens there? Clever implementation for an OS that is limited in what it allows in this regard.

I've tried Rewind on the Mac for a little bit but turned it off because I thought it was causing an issue with my notifications (I think now it's related to something else). I never "used" a rewind in part because I hate using consumable things (See also my slight aversion to Kagi, though I want to give it another shot). I also dislike pricing that's not really based on ongoing costs (searching your local archive 10 times or 1000 doesn't seem to cost Rewind anything). I was also not super excited about the whole "we will summarize your meetings" feature I got a notification about as it requires sending your data to Rewind. Also, I think part of my issue is that while I like having the history I don't have the muscle memory to use said history yet and so I forget it's there.