Safr - Know Your Chances

Safr - Know Your Chances

Track cycle & pregnancy risk

38 ratings
2 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 26, 2026
  • July 14, 2026

Features

Safr - Know Your Chances screenshot #1 for iPhone
Safr - Know Your Chances screenshot #2 for iPhone
Safr - Know Your Chances screenshot #3 for iPhone
Safr - Know Your Chances screenshot #4 for iPhone
Safr - Know Your Chances screenshot #5 for iPhone
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About

This app provides personalized fertility and pregnancy risk insights using your logged data and scientific research. It tracks basal body temperature, LH test strips, and cervical mucus to offer daily probabilities and a virtual pregnancy test. Unlock advanced features and integrations with a subscription.

Personalized fertility insights
Pregnancy risk assessment
Basal Body Temperature (BBT) tracking
LH test strip logging
Cervical mucus analysis
Virtual pregnancy test
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What's New in Safr

1.5.0

July 14, 2026

Safr 1.5.0 is our biggest update yet: a smarter start, and a big round of fixes. NEW - A redesigned welcome that reacts to your answers as you set up, with visual explainers of how each protection method compares and why your real cycle beats a fixed calendar - Worried right now? A guided check-in reviews what you logged, step by step, with a calming breath built in. Your estimate is ready the moment setup ends - Share what is on your mind during the check-in and Safr reflects it back, connected to what you logged - Interactive temperature chart with clearer ovulation detection, shown in your device's preferred unit - Clearer guidance on when a home test gives a reliable answer FIXES - Closing the subscription screen now works as expected - Fixed a cold-start crash affecting devices on the latest iOS - Reminders and insights no longer switch off for the most overdue cycles - Fixed the date of birth picker jumping on first open - Ovulation chart labels now line up with their gridlines - Sharper artwork, smoother transitions, and better support for larger text sizes

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Subscription plans

Monthly Premium Access

Access to Safr Premium for 1 month

$14.991 Month
How to cancel Safr subscription ⁉️

User reviews

⭐⭐⭐⭐ obsessed

okay so i downloaded this kinda as a joke bc my friend sent it to me but like?? it’s actually SO useful. i’ve been using flo forever and it’s fine but it never really told me the stuff i actually wanted to know, like in normal girl terms. safr literally just tells you if you’re in a safe window or not. no weird clinical wall of text, no “consult your healthcare provider 🙂” popup every two seconds.
the pregnancy test thing is lowkey a lifesaver. i was NOT about to walk into CVS with my mom’s friend working the register. being able to do it through the app was so much less stressful, i almost cried ngl.
onboarding was cute, didn’t take forever, and the ui actually looks like someone under 40 made it. the only thing is i wish premium was a little cheaper bc i’m literally in high school 😭 but other than that no notes.
would recommend to literally every girl i know. sending to the group chat rn.
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so helpful!!

safr really helps with knowing my safe vs not safe days for being unprotected, and i love the pregnancy test feature so i don't have to sneak around to get one

Developer apps

FAQ

How does Safr calculate fertility and pregnancy risk?

Safr uses a combination of your logged data, including Basal Body Temperature (BBT), LH test results, and cervical mucus analysis, along with established scientific research. It analyzes your unique biological patterns to provide daily fertility probabilities and pregnancy risk levels.

What integrations does Safr offer?

Safr offers advanced integrations with Apple Watch for nightly wrist temperature data syncing via Apple Health. This allows for seamless and accurate BBT tracking to enhance fertility predictions.

Can Safr be used to track intercourse for risk assessment?

Yes, Safr allows you to log multiple types of intercourse, including protected, unprotected, and withdrawal methods. This comprehensive logging helps ensure the accuracy of your pregnancy risk assessment.

Does Safr provide a virtual pregnancy test?

Yes, Safr features a virtual pregnancy test that estimates your chances of being pregnant. It combines your cycle timing, BBT trends, and LH data to generate a structured, data-driven likelihood.

What are the subscription options for Safr?

Safr offers various subscription plans, including weekly, monthly, and yearly access. Options include a 3-day free trial for weekly premium access, with prices ranging from $4.99 weekly to $59.99 annually.

Is Safr suitable for all users?

Safr is designed for individuals tracking fertility and pregnancy risk. It is rated for ages 17+ and does not provide medical advice, recommending users consult a healthcare provider for medical guidance.

How often is Safr updated?

The latest version of Safr is 1.4.5, and it was last updated on June 26, 2026. This indicates regular updates to improve functionality and accuracy.

What is the user rating for Safr?

Safr has a strong user rating of 4.7 stars based on 36 ratings. This suggests a high level of user satisfaction with the app's features and performance.