For a period tracking app, you can use Clue. They also has many well researched articles on the female reproductive system on their app and their website Hello Clue. Source: about 1 year ago

Here's the website, they have an Apple version too: https://helloclue.com/. Source: over 1 year ago

I came up with the various symbols myself; for fertility stuff my first thought would be to look at what Clue is using these days, if you're drawing a blank (as it were) on anything! Let me know if you'd like to see a more recent/more filled-out version :). Source: over 1 year ago

Can’t vouch for the efficacy because I haven’t used the feature, but the cycle tracking app I use clue has a new birth control feature that’s FDA cleared. it’s by far my fav tracking app and i’ve been a loyal user for years now, so i’m sure their BC function is good too. Source: over 1 year ago

Please check out Clue App on Android and iPhone. This app refuses to sell data and will keep you safe. It's already used by 12 million people, make the number higher! Source: almost 2 years ago

There are trackers other than the AirTag that use the same Apple Find My network, like the Chipolo or the ultra-thin Rolling Square AirCard. Source: 6 months ago

I recently received a bunch of Chipolo beacons which I would like to use but unfortunately the official Android app is a privacy nightmare. Does anyone know if there's a FLOSS app for controlling these? An Android app would be great but I'd be happy to use them under Linux as well. Source: over 2 years ago

So they’re also allowing 3rd party to use findmy features and app, for example chipolo appears to operate just like an AirTag, but cheaper, I can’t tell if there are any feature disadvantages to the chipolo version 🤔. Source: about 3 years ago