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          Menstrual Cycle Basics

          • What is a Menstrual Cycle?
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          • Tracking Ovulation
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          Birth Control & Options

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          Period Problems

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          How to use

          • Selin – Your Smart Period Tracker App (FAQ)
          • How can I track my period in the Selin app?
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          • Pickle juice: cramp relief or just a myth?
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          • Daily Pads: Yes or No?
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Track your Partner's period

Know when your partner’s period starts & ends — never get surprised!

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Be in Sync: Track and Connect
Selin.app-qr-code-download-period-app Scan to download the app

Never Miss an Important Moment — Set Reminders

Selin helps you support your partner by keeping track of important moments in her cycle and relationship milestones.

Reminders Include:

  • Period Start & End: Know when her period starts and ends to avoid surprises.
  • Fertility Window & Ovulation: Stay informed about her fertile days for family planning.
  • Doctor Appointments: Never miss a check-up.
  • Special Moments: Set reminders for birthdays, anniversaries, or intimate moments.
  • Custom Reminders: Tailor reminders for anything important to you both.

Stay informed, stay connected, and support her with Selin.

Today Screen: Stay in Sync with Your Partner’s Cycle

The Today screen helps you support your partner’s reproductive health:

  • Partner Selector: Switch between partners and keep track of each one’s cycle.
  • Pregnancy Chances: Check daily updates on your partner’s chances of conception.
  • Cycle Tracking: Stay updated on period dates, fertility windows, and ovulation.
  • Quick Stats: See important data like cycle length, period duration, and fertility info at a glance.

Stay in sync with your partner’s health through real-time insights!

AI Virtual Assistant & Health Insights for Partners

Our AI-Powered Virtual Assistant is ready to assist you with any questions about your partner’s health, including periods, ovulation, symptoms, and overall wellness. Discover personalized health insights that cater to her unique cycle, helping you support her every step of the way.

Unique features

What makes our ovulation tracker special

Simplicity for Partners
Easily add multiple partners and monitor their insights on the Today screen, allowing you to select between partners and stay informed about their unique needs.
Predictive Cycle Tracking
Selin uses advanced predictive algorithms to estimate the start and end dates of your partner’s menstrual cycle, helping you plan and prepare effectively.
Birth control tracking
Custom Reminders
Create personalized reminders for each partner profile, ensuring that you never miss important dates like birthdays, special occasions, or reminders to buy condoms.
Thoughtful Gestures
Easily add important preferences for your partner, such as favorite flowers, toys, sounds, or sweets, to make your moments together even more special. You can also include her phone number for quick access.
Symptom Tracking
Symptom tracking is designed to help you understand your partner’s behavior based on the day of her cycle, making it easier to provide support and monitor her well-being.
You can add multiple profiles for family members, enabling you to track their menstrual cycles alongside your own.
Multiple Profiles
Add multiple profiles for different partners, enabling you to track their menstrual cycles and know when to make a visit—never get caught off guard. Customize reminders and notes for each profile to ensure you stay connected and informed about their unique needs.

App statistics

4.8

Average rating

400,000 +

Active installs

9,452,342

Downloads

Testimonials

Millions of women worldwide use Selin for easy and accurate period tracking.

Star rating

4.8 out of 5 Average rating

<em data-start="607" data-end="788">Com o Selin, agora recebo lembretes para quando comprar camisinhas, flores e até quando as meninas não começaram o período. Nunca erro no tempo certo. O app me mantém preparado!</em>
Vinícius
I never knew tracking menstrual cycles could be this easy. Selin keeps me informed, and I love being able to support my partner in a meaningful way!
Parker P.
Selin’s interface is straightforward and user-friendly. I can access all the information I need at a glance, making me feel more involved in my partner's health.
Drew D.
This app has helped me be more thoughtful in my relationship. Knowing my partner’s cycle has made our time together even more special.
Riley S.
I love that I can set reminders for not just birthdays but also special moments like anniversaries. It really helps strengthen our connection!
Morgan M.
The symptom tracking is a lifesaver! It helps me understand how my partner is feeling on any given day, making it easier to provide support.
Jamie W.
Selin's predictive tracking feature is fantastic! I can plan ahead and support my partner better during her cycle.
Skyler K.
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