Safr - Know Your Chances
Grow Labs LLC Health & Fitness iPhoneiPadiPod touch
Safr - Know Your Chances is a free Health & Fitness app for iPhone and iPad by Grow Labs LLC. Rated 4.7/5 from 58 ratings. Requires iOS 16.0.
- Rating
- 4.7
- 58 ratings
- Price
- Free
- on the App Store
- Size
- 59 MB
- Age 17+
- Updated
- Aug 18
- 2026 · v1.5.2
Screenshots
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
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.
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Mooni: Period Wellness Tracker
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Pregnancy Test Checker (AI)
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Clearblue Period Cycle Tracker
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Melda Cycle & Period Tracker
4.7
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Trying to conceive Tracker app
4.5
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Pregnancy Test Checker: CLine
3.7
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Safr - Know Your Chances | 4.7 / 5 (58 ratings) | Free | August 18, 2026 | |
| Mooni: Period Wellness Tracker | 4.0 / 5 (4) | Free | Oct 15, 2026 | Compare |
| Pregnancy Test Checker (AI) | 4.3 / 5 (370) | Free | Oct 1, 2026 | Compare |
| 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 |