Just checked out both drip and Bluemoon, both FOSS from F-Droid with local only data

Bluemoon lets you import data from Flo, but to export data from Flo, you need to make an account with Flo, it seems. (It also let's you import data from Clue, but I don't use Clue.)

drip lets you import data just from a CSV file, nothing that seems specific to any app format. So far I like drip a lot better, TBH; the UI is more intuitive to me, and it seems more featureful. Its prediction also lines up with Flo after putting in data since January.

However, I have just downloaded both apps. My plan is to keep Flo around for one more cycle while I compare it to the others, then kick Flo to the curb for becoming enshittified spyware, with sad nostalgia for the life-changing product it originally was to me.

Right now, I am not seeing luteal vs. follicular phase estimated with just period data on either, though, which is annoying. I want a rough sense for the purposes of some tailored nutritional stuff, but I'm not looking to get pregnant or anything and really do not wish to bother with the trouble of taking daily temperatures. Flo currently gives me that. I know it's basically just adding 15 days but I still like having the at a glance feature.

EDIT: Adding Mensinator, another FOSS one on F-Droid, to the trial. Looks like this one offers an import feature, but I have no idea what format it's expecting, because it couldn't find my export from Bluemoon. Mensinator does provide the option to just mark a day as ovulation, which neither Bluemoon nor drip offer. It does at least seem like drip tells you if you're in the first or second half of your cycle on the individual day profile for the day of, but I want something I can use for meal planning. Mensinator may be the best suited for me so far, but I will give them all time.

Also, bafflingly, when I attempted to export my data from drip, it provided me a "share file" option to share the .csv file without a simple option to just...download it.

EDIT 2: Now that I've had some periods to trial this out, Mensinator is my personal winner. Easy enough to use, good predictions, and predicts ovulation without having to do daily measurements. Feel free to play around with options yourself to find which suits you best, though.

This.

And there are options that store the data locally on your phone rather than on a company server. This is the safest option.

There are a few:

• https://f-droid.org/packages/com.drip
• https://f-droid.org/packages/ch.nilsgrob.android.bluemoon
• https://f-droid.org/packages/com.mensinator.app

I'm not a user of any of those, but from descriptions and screenshots alone they look decent.

I use Drip for basic cycle tracking. I don't use it for fertile phase tracking so no comment there.

For cycle tracking, it does what it needs to do. It's easy enough to setup and completely forget what tracker/spyware I used to use. Heck, I think it was Flo I used to use.

And f-droid or another alternative app stores not mandatory, Drip is on the Google Play store at least. Not sure about Apple.

The idea that putting this on your phone is bonkers is bonkers to me. Why would you want to carry around a journal or paper when you have everything on your phone? It can also be more easily backed up and synced.

It shouldn't be normal that this data is stolen and sold. That is 100% the problem, not the fact that people track things on computers.

I hope you'll feel better soon!

It's really frustrating how people still trust their sensitive personal data to apps like this.

Reminds me of that Derrick Comedy sketch with Donald Glover about mercury poisoning. "How are you feeling?" "SLIIIIImy"

We shouldn't have to go back to pen & paper to avoid big tech; that's an absurd overreaction to the point of almost coming across as a strawman argument. We should expect to have privacy-respecting alternatives (e.g. from F-Droid, as others in the thread are mentioning) available, as well as effective consumer protection laws.

The solution is not to just give up; the solution is to force the world to get better.

keep in an actual wall calendar in your home.

There's no need to go so primitive in response; just stick to offline FOSS apps that individuals made with no Internet permissions. F-Droid/Droid-ify has multiple offline period trackers.

... Wait, you are on Linux, right?

Not feasible for me