I’d actually advise a low tech solution here. You can buy paper agendas designed for exactly this sort of thing, and we used one for my daughter.

There’s some benefits:

• it’s always where you need it, because it’ll always live beside the changing pad/table
• if there’s a “guest diaper changer”, they can use it
• if you’re tracking a late night feeding or change, you can scribble in the data without getting blasted by your phone backlight
• it’s a physical memento from that time you can flip through later

The cons include needing to look somewhere else for the time, which means checking your phone or a wall clock since that paper ain’t gonna tell you.

If you do go the app route, look into the accessibility settings on your phone to help with glaring backlight. On iOS, you can map the Siri button to apply a different black point, which basically toggles to a much darker backlight than you’d normally get.

Now, whenever I’m lurking around the kid while she’s sleeping, I just triple-tap that button and it dims my backlight to something that won’t disturb her.

There's really no need for a specialized app. My partner and I would just message each other with "pee" or "poop" for diaper changes and the quantity of milk when feeding. Messages are automatically time-stamped.

Huckleberry. Is it safe, no idea. But it requires minimal permissions and you can name the baby whatever you want so there’s that 🫥