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  • Safr - Know Your Chances screenshot 1
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About Safr - Know Your Chances

Most apps rely on averages. Your body doesn't. Safr uses the data you log to give you clear, personalized insight into your cycle, your fertile days, and your pregnancy risk. How Safr Works: 1. Built on published research. Safr draws on established reproductive health research and fertility awareness methods. Your cycle follows biological patterns, and Safr helps you see yours. Safr brings your signals together in one place: - Overnight Temperature (optional): import the wrist temperature you already track in Apple Health to see your cycle patterns more clearly. - LH Test Strip Logging: log your luteinizing hormone (LH) results to understand your peak fertility window. - Cervical Mucus Tracking: guided tools to track this key biological indicator across your cycle. - Cycle History & Symptoms: Safr adapts to your unique patterns, not a fixed calendar. 2. Know your pregnancy risk every day. Safr gives you daily fertility probabilities and clear risk levels so you always know where you stand. You can also log Plan B (emergency contraception) and multiple types of intercourse (protected, unprotected, or withdrawal) so your daily picture reflects what actually happened. 3. A smarter way to check pregnancy likelihood. Safr's virtual pregnancy test estimator uses your cycle timing, temperature trends, and LH data to estimate your chances of being pregnant. It is an estimate based on your logged data, not a diagnosis and not a substitute for a home pregnancy test. A subscription is required to unlock the full power of Safr, including: - Apple Health temperature import - Enhanced tracking: LH test strips, cervical mucus, and comprehensive intercourse logs - Personalized fertility probabilities and cycle reports - Virtual pregnancy test estimate & AI health assistant Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Disclaimer: Safr is for informational purposes only. It is not a medical device, does not provide medical advice, diagnosis, or treatment, and is not a contraceptive. Always seek a doctor's advice in addition to using Safr and before making any medical decisions.

Ratings & reviews

4.7

58 ratings

5 ★ 83% 4 ★ 10% 3 ★ 3% 2 ★ 0% 1 ★ 3%

What’s new

Version 1.5.2 · Updated August 18, 2026

We're always listening to your feedback and working to make Safr better, more accurate, and easier to use. Here's what's new: • Your cycle as a chart: a new Chart view on the Calendar page brings your temperature and LH readings, cervical mucus notes, and your saved test strips together in one place. • Easier LH strip reading: frame the strip right in the camera and Safr reads it consistently. If you correct a result, your correction sticks, and the camera stops asking for access you already gave. • Sharper fertile window estimates: ovulation timing now draws on your measured temperature shift, your cervical mucus peak, and the onset of your LH surge together, so your window reflects the signals you actually logged. • A more helpful Health Assistant: start a new conversation whenever you want, and swipe right or tap back to leave the chat. • Reminders you can trust: reminders no longer linger after you turn them off, and scheduling is more reliable overall. • An optional research study: if you sync basal body temperature from a wearable, you can now choose to join our consent-first BBT study. Entirely optional, and easy to leave. • Reach us in a tap: support now goes straight to our team at [email protected]. • A smoother start: one continuous splash from open to app, plus hardened storage so a damaged file can never keep Safr from launching. Thank you for helping us make Safr better.

App privacy

The developer, Grow Labs LLC, reported these privacy practices to Apple.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Purchases: Purchase History
  • Identifiers: Device ID
  • Other Data: Other Data Types

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Purchases: Purchase History
  • Identifiers: Device ID
  • Other Data: Other Data Types
  • Health & Fitness: Health
  • Usage Data: Product Interaction
  • Sensitive Info: Sensitive Info

Used for: Third-Party Advertising, Analytics, Product Personalization, App Functionality

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • User Content: Photos or Videos, Other User Content
  • Health & Fitness: Health
  • Sensitive Info: Sensitive Info

Used for: App Functionality, Other Purposes

Alternatives to Safr - Know Your Chances

Looking for apps like Safr - Know Your Chances? Here are 6 similar apps on the App Store. The highest rated is Melda Cycle & Period Tracker (4.7/5), and all 6 are free to download.

Safr - Know Your Chances vs. alternatives
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Safr - Know Your Chances 4.7 / 5 (58 ratings) Free August 18, 2026
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Clearblue Period Cycle Tracker 4.6 / 5 (408) Free Sep 17, 2026 Compare
Melda Cycle & Period Tracker 4.7 / 5 (447) Free Oct 7, 2026 Compare
Trying to conceive Tracker app 4.5 / 5 (1,585) Free Jul 28, 2026 Compare
Pregnancy Test Checker: CLine 3.7 / 5 (33) Free Jul 23, 2026 Compare

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