Been looking for a baby tracking app for ages but all of them sell your data to third-parties. Finally found one with a great privacy policy (your baby's data stays within Apple's iCloud servers and is not sold to third-parties). https://mangobaby.app/privacy
On top of that, intuitive interface and solid features. Full feature list here: https://mangobaby.app/press-kit. Made by San Francisco-based, indie app developer Yilei Yang.
The base app is free and ad-supported (though the ads are not tracked:). You can unlock all features for $1.99 (Black Friday sale), down from $14.99. Looks like the Black Friday/Cyber Monday sale is still running based on the US timezone.
The app also supports Apple's Family Sharing, so only one person in your family needs to pay for the app.
Hope this helps all the privacy-conscious parents out there:)
For first time parents. Only really useful think is the measurements and that comes with your bluebook