Selin Period Calendar — Smart Tracker for Cycle, Ovulation & PMS
Accurate period and ovulation predictions, symptom tracking, and daily care for women’s health.
Take control of your cycle!
Scan to download the app🧡 What is Selin
Selin — a smart period calendar for cycle, ovulation, PMS & fertility tracking
Selin is a modern app for tracking your menstrual cycle, ovulation, symptoms, and mood.
It helps you better understand your body, recognize patterns across the phases of the menstrual cycle and consciously manage your well-being.
Who Selin is especially helpful for
- women who are planning pregnancy;
- those who want more accurate ovulation and fertile-day tracking;
- anyone dealing with irregular cycles, stress, or changing sleep schedules;
- those who experience PMS, mood swings, or energy fluctuations.
What Selin gives you every day
- shows the connection between your cycle, well-being, and mood;
- helps you prepare in advance for your period, ovulation, and PMS;
- creates a sense of control and calm around your body;
- offers a convenient all-in-one space for daily self-care.
Selin helps you feel calmer, understand changes in your body, and know what to expect
on different days of the month — whether you simply want to understand your cycle better or are actively planning conception.
We also provide in-depth guidance on heavy periods and menstrual cramps, along with practical recommendations to help you better understand your body.
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Selin Features
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Smart Cycle Calendar
A clear and easy-to-use calendar that automatically adapts to your cycle and becomes more accurate with each month.
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Ovulation & Fertile Window
Selin highlights your most fertile days, shows ovulation , and helps you better understand each phase of your cycle.
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Pregnancy Planning Support
The app identifies days with a higher chance of conception, helps track changes, and gives you confidence throughout the pregnancy planning process.
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Smart Reminders
Selin notifies you in advance about your period, ovulation, PMS, and important days
so you’re always prepared.
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Mood, Energy & Symptom Tracker
Track your mood, sleep, well-being, PMS, pain, and any changes.
Selin analyzes patterns and helps you understand how different cycle phases affect your body.
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Clear Analytics
Visual charts and statistics clearly show changes in your cycle, mood, and symptoms — all in one place.
Download Selin and start tracking your cycle today!
💡 Why Selin
Why Selin helps you understand your cycle better than basic calendars
Unlike simple apps that only mark period dates, Selin analyzes your data and adapts to your individual cycle patterns.
This is especially important for women with irregular cycles, high stress levels, changing sleep schedules, or hormonal fluctuations.
Selin shows how your menstrual cycle affects mood, energy levels, productivity, and overall well-being. You don’t just see predictions — you discover patterns that help you better understand your body.
For women planning pregnancy, Selin highlights the fertile window, ovulation, and days with a higher chance of conception — making the app a reliable helper throughout the planning process.
Selin is suitable for teenagers, adult women, and anyone who is just starting to track their cycle. The interface remains intuitive, while reminders are gentle and non-intrusive.
Selin helps you feel calmer, better understand changes in your body, and know what to expect on different days of the month.
If your cycle feels unusual — heavier bleeding, increased pain, or discomfort — visit the Knowledge Hub, where you’ll find articles explaining possible causes and practical support recommendations.
How does Selin work?
Selin is a smart menstrual cycle calendar that analyzes your data and helps predict your period, ovulation, PMS, and fertile window with greater accuracy.
The app works in three simple steps:
1. You enter your cycle information
At the start, Selin asks for the date of your last period, your average cycle length, period duration, and preferred reminders. This information creates a personalized
foundation for your cycle.
2. Selin analyzes changes in your body
Selin’s algorithm takes into account real cycle variations, symptoms, mood, stress levels, fertile window data, and more. The more information you log,
the better the app understands your hormonal patterns.
3. The app provides predictions and sends reminders
Selin automatically predicts your next period, calculates ovulation, fertile days, and PMS, analyzes symptoms, and reminds you about important actions — vitamins, hygiene products, cycle-related events, doctor visits, and more.
You can also learn more about menstrual symptoms and how tracking them helps improve prediction accuracy.
Who is Selin for?
For women with regular and irregular cycles
Selin adapts to your real cycle, accounts for changes,
and helps you better understand your body’s signals.
For women who want to track mood and well-being
Mood, energy, and symptom tracking shows
how hormonal changes affect your everyday life.
For anyone who wants less stress before their period
Accurate PMS predictions, tips, and reminders help you
prepare in advance and feel calmer.
For partners who want to be more supportive
A dedicated Partner Mode lets you see important dates
and receive reminders — helping build caring and supportive relationships.
How Selin differs from other cycle tracking apps
Many apps offer only basic calendar features. Selin combines ease of use, personalized
cycle adaptation, advanced reminders, and partner support. This makes it a convenient
tool for daily understanding of your cycle and well-being.
| Feature | Selin | Flo | Clue |
|---|---|---|---|
| Personalized cycle adaptation | ✅ Yes | Partly | Partly |
| Minimal, easy-to-use interface | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ |
| Partner reminders | ✅ Yes — unique feature | ❌ No | ❌ No |
| Advanced reminders (meds, BBT, shopping, events) | ✅ 10+ types | Limited | Limited |
| PMS, ovulation & mood predictions | High accuracy | Standard | Standard |
| Mood, energy & symptom tracking | Yes | Yes | Yes |
| Partner Mode | ✅ Yes | ❌ No | ❌ No |
| 70+ languages | Yes | No | Partly |
| Privacy & anonymity | High | Medium | Medium |
Selin belongs to the same category of menstrual cycle tracking apps as Flo and Clue. At the same time, Selin focuses on data privacy, a simple interface, and personalized cycle predictions.
Privacy & data security in Selin
The menstrual cycle is deeply personal. At Selin, we treat health and mood data with
maximum responsibility and do not share it with third parties for advertising purposes.
You control your data
You decide what to save, what to delete, and which reminders you want to receive.
You can clear your cycle history at any time.
No selling data to advertisers
We do not sell data about your cycle, symptoms, or mood to ad networks
and we do not use it for targeting.
Secure storage
Data is stored on secure servers, and transfers happen via encrypted channels.
We follow modern security best practices.
Respect for sensitive topics
Selin helps you understand your body and emotions without judgment or pressure —
only gentle guidance and support.
FAQ: Часті запитання про застосунок Selin
Yes, Selin can be used for free.
The free version gives you access to a period calendar, menstrual cycle tracking, ovulation predictions, PMS tracking, and essential tools for everyday women’s health monitoring.
If you wish, you can upgrade to Selin Premium, which offers advanced cycle predictions, deeper analytics, and additional tools to help you better understand changes in your body.
Selin uses adaptive algorithms that analyze your cycle history, symptoms, mood, phase lengths, and other data. With each month, predictions become more accurate, including:
- period start dates
- ovulation
- fertile window
- likelihood of PMS
- changes in well-being
Accuracy improves as you continue logging your data — that’s why Selin is considered one of the most reliable period and ovulation tracking apps.
Yes. Selin is specifically designed to adapt to irregular menstrual cycles.
If your cycle varies, the app:
- adapts predictions to your individual physiology
- uses probabilistic models rather than fixed averages
- helps reduce uncertainty and anxiety
- reveals patterns that are difficult to notice on your own
For many women with irregular cycles, Selin makes it easier to understand how their body works and to anticipate possible changes in advance.
Yes, Selin is well suited for women who are planning a pregnancy.
The app helps you:
- track ovulation
- identify your fertile window
- log basal body temperature
- track symptoms that may indicate fertile days
- receive more accurate and personalized predictions after several cycles of use
Selin does not replace medical advice, but it significantly increases awareness
and helps you better understand and navigate your reproductive health.
Selin places a strong emphasis on data security. Your data:
- is stored locally and in encrypted form
- is not shared with third parties
- is not used for advertising purposes
- is accessible only to you
Selin follows modern privacy standards and collects only the information
that is truly necessary for the app to function.
Yes. Selin offers smart reminders to help you stay on top of what matters:
- contraception reminders (pills, patch, ring, implant, IUD, injections)
- doctor appointments
- basal body temperature tracking
- vitamins or medication intake
- water intake reminders
- custom events and habits
This makes Selin not just a period calendar, but a complete companion for everyday health and self-care.
Yes. In Selin, you can manually create reminders for any day of your cycle — for example:
- buy tampons
- restock pads
- buy ovulation tests
- order vitamins
You decide what to track — Selin adapts to your lifestyle.
Yes. Selin is designed not only for women, but also for their partners.
A partner can:
- track their girlfriend’s or wife’s cycle
- understand when a period, ovulation, or PMS is approaching
- receive reminders and be more attentive and supportive
- plan important events together
- better understand hormonal changes
Many partners use Selin to strengthen relationships and become more supportive and understanding.
Partners can enable special reminders designed to help them care for their loved one:
- “Time for intimacy” — guidance for days with higher fertility
- “Buy contraception” — reminders to restock protection
- “Gift reminder” — prompts for surprises during PMS or special days
- “Birthday” — important dates to remember
- “Doctor visit” — reminders for scheduled appointments
- “Support days” — reminders to be extra attentive and caring
Selin helps partners stay mindful of important moments and show care in everyday life.
Partners use Selin to:
- better understand a woman’s mood and physical well-being
- plan intimacy more consciously
- be prepared for PMS
- offer emotional support to their partner
- avoid conflicts caused by misunderstandings
- support pregnancy planning
Many men say Selin helps improve relationships and makes them more balanced and harmonious.
Yes. Partners can enable notifications such as:
- “Ovulation approaching”
- “Fertile window”
- “PMS likelihood increasing”
- “Cycle start”
- “Best time for support”
This helps partners better understand what’s happening in their partner’s body
and respond with care and understanding.
Selin belongs to the same category of menstrual cycle tracking apps as Flo and Clue,
but places a stronger focus on data privacy, personalized predictions,
and a clean, minimalist interface.
