Sorry to hijack a bit here, but have any good links to open source baby tracking apps that allow sharing between partners? The popular options out there on the app stores are a privacy dumpster fire.
If you're up for self-hosting, there's BabyBuddy[0]. There's no first-party native app, but it is a decent web app and there's some third-party apps/integrations. And of course, multiple users is a priority. No affiliation, just a user :)
I used this for our newborn recently and was very impressed with how flawlessly the partner sharing worked - https://mangobaby.app It is not open source. But didn't look suspicious like the other apps on the store. The privacy labels on the iOS App Store seemed acceptable too (for us).
[0]: https://github.com/babybuddy/babybuddy