Fertility awareness, made honest
Am I fertile today?
One honest answer.
Track your cycle with the symptothermal method. No predictions. No guessing.
A guide to your fertile window — not a contraceptive.
Your cycle data is being sold.
Pretty apps sold your data. We don't.
$59.5M class action settlement after Flo shared health data with Facebook & Google
Flo / Google class action, 2025
Your health data is never sold. Ever.
18 of 25 top period & pregnancy apps flagged *Privacy Not Included
Mozilla Foundation, 2022
Open source — nothing to hide.
$59.5M class action settlement after Flo shared health data with Facebook & Google
Flo / Google class action, 2025
Your health data is never sold. Ever.
18 of 25 top period & pregnancy apps flagged *Privacy Not Included
Mozilla Foundation, 2022
Open source — nothing to hide.
Three steps. That's the whole app.
Log your day
Temperature, fluid, signs — takes a minute.
See where you are
A clear answer — or an honest ‘not sure’, never a guess.
Go about your day
That's it. The app gets out of your way.
Everything you need. Nothing you don't.
No feeds, no streaks, no ads — just your cycle.
Available now
Coming soon
We keep it small on purpose — every feature has to earn its place.
Want a feature? Just askQuestions, answered.
The honest version. No fine print.
Is this a contraceptive?
No. canihavesex.today helps you understand where you are in your cycle, but it is not birth control and won't prevent pregnancy. It isn't a substitute for medical advice — always talk to a healthcare professional about contraception.
How accurate is it?
Accuracy depends on tracking consistently — the more days you log, the clearer the picture. The app is deliberately conservative: it would rather say “not sure yet” than give a false sense of certainty. It's a guide, not a guarantee, and not medical advice.
Is my data actually private?
Yes. No ads, no third-party trackers, and your health data is never sold. The app is fully open source, so you can audit exactly what it does — or self-host it on your own server and keep your data entirely to yourself.
What's the symptothermal method?
It's a well-studied fertility-awareness method that combines two signals — your basal body temperature and cervical fluid — to estimate where you are in your cycle. We use a careful, conservative version: when the signs are unclear, the app says so instead of guessing.
Is it free to start?
Yes — every plan starts with a 14-day free trial, no card required. After that, we run it for you for $69/year or $420 once, with every feature included. If you're technical and prefer to run it on your own server, self-hosting is free forever.
Can I use it to try to conceive?
You can already use it to understand your fertile window. A dedicated try-to-conceive mode is on the way — one of the few features we're actively building.