Don't be on any ovulation tracker app OR site or anything that's not pen and paper. It's easy enough.

@VeroniqueB99 I installed Flo and it did not require an account. It could possibly be storing IP address.

https://flo.health/

Period tracker, ovulation tracker, pregnancy app | Flo

Track your periods, ovulation, and pregnancy with the Flo app. Log your cycle symptoms so you can understand your body better.

Flo.health - #1 mobile product for women’s health
@markstos @VeroniqueB99 the App Store does say it tracks your location and identify but being a UK company sounds better? There’s a lot of data they report as linked to you.