The private alternative to Flo.
If you're looking for a period tracker that respects your privacy and doesn't share your intimate health data with advertisers, you're in the right place.
Why people switch from Flo
Flo is the most popular period-tracking app in the world — and also the subject of one of the biggest health-privacy cases to date. In 2021, the U.S. Federal Trade Commission found that Flo had shared sensitive health data with third parties including Facebook and Google, despite telling users it wouldn't, and ordered it to change course. In 2025, a related class action was settled for a combined $59.5 million (Google, Flo, and the analytics firm Flurry).
canihavesex.today is built the opposite way. It's fully open source, so there's no black box to take on faith — anyone can read exactly what it does with your data. It shows no ads, embeds no third-party trackers, and never sells your health data. And if you'd rather not trust a company at all, you can self-host it on your own server.
Sources: FTC (2021), $59.5M settlement (2025).
Common questions
Is canihavesex.today a good alternative to Flo?
Yes — especially if privacy is why you're leaving. It's fully open source, shows no ads, embeds no third-party trackers, never sells your data, and can be self-hosted. And instead of calendar-style predictions, it reads your actual daily signs using the symptothermal method.
Did Flo share users' health data?
According to the U.S. Federal Trade Commission (2021), Flo shared sensitive health data with third parties including Facebook and Google despite promising not to. A related class action was settled in 2025 for a combined $59.5 million (Google, Flo, and the analytics firm Flurry). Flo was ordered to change its practices and has since done so.
Is canihavesex.today free like Flo?
It isn't ad-supported. Every plan starts with a 14-day free trial, then $69/year or $420 once — or you can self-host it free forever. The difference: we earn from subscriptions, not from your data.