Your AI guide to your cycle, and your relationship
Know yourself. Understand each other.
Cycle Pair takes the pain out of wondering why your energy is low, and tells you what to do about it. It starts with you, and it’s better with two.
- Your cycle data stays on your phone
- No ads or trackers
- Free in the beta
Android first, iOS to follow. General wellness information, not medical advice. Phases and dates are estimates.
The Reset · Days 1-5 · Menstrual
Sound familiar?
Nobody told us there was a pattern.
- The same argument, again
- A quiet week that comes out of nowhere
- “What did I do?”
- Feeling off and not knowing why
- Low energy and no idea what to do about it
Most of us were never taught how a cycle shapes energy, mood and stress. You don’t know what you don’t know about yourself, and neither does the person next to you.
Your cycle, explained
Why is my energy low? Now you know.
Think of it as a guide that knows where you are in your cycle. Low, high or somewhere in between, it tells you why and what might help.
What phase am I in?
Add your last period date and Cycle Pair shows your phase today, the next one, and a weekly forecast.
Why do I feel like this?
Every tip comes with an “Ask why”, in plain language, so low energy stops feeling like a personal failing.
What should I do about it?
Low energy, high energy, a tense moment: your guidance chat suggests something small and doable.
The guidance chat is AI. It can be wrong, and it isn’t therapy or medical advice.
Illustration of Weekly Compass
Busy week ahead. Wednesday and Thursday look full, and you’re heading into The Dip. Maybe protect Friday evening for rest.
Weekly Compass
It looks at your week, so you don’t have to.
Weekly Compass reads how busy your calendar is and sets it next to your cycle. Busy week and a low-energy phase? It suggests some rest. Open week and plenty of energy? It suggests making the most of it.
Available in the Android app, and optional.
Your calendar is read on your phone. Only a busy score (0 to 3) and an “away” flag for each day are sent to write the suggestions. Event titles, places and people are never sent.
Local ideas
Things to do nearby, that suit the week you’re in.
Tell Cycle Pair your city and what you enjoy. It suggests local activities that fit your phase and your calendar: something lively when energy is high, something gentle when it’s low.
Illustrative suggestions. Your city and interests are what you choose to enter, and the app never asks for your location. Check details before you go.
Illustration · Local ideas
SAT · 11:00 AM
Saturday market walk
Why this week. A gentle, low-key outing for The Reset.
How it works
Three small steps.
Check your phase
Add your last period date. Cycle Pair shows where you are today and what the week ahead may feel like.
Let the Compass read your week
On Android, it looks at how busy your calendar is and suggests where to rest or lean in.
Ask when it gets hard
Ask the guidance chat what to say, or what to do this weekend. Link a partner when you’re ready.
The five phases
One cycle, five different weeks.
Cycle Pair names each phase for how it tends to feel. Every person is different, and the days are estimates based on a 28-day cycle that adjusts to your own history.
The Reset
Days 1-5 · Menstrual
Energy tends to run low. Rest isn’t laziness.
The Climb
Days 6-10 · Follicular
Energy and focus often build.
The Peak
Days 11-15 · Ovulation
Many people feel most outgoing.
The Dip
Days 16-19 · Early luteal
Energy can dip and feelings sit closer to the surface.
The Guardrail
Days 20-28 · Late luteal
Stress can land harder. Gentle plans help.
Pairing
Together, only if you want.
Cycle Pair is useful on your own. When you’re ready, link a partner with an emailed code, and share only what you choose.
- Solo use needs no account. You sign in by emailed code only to link a partner.
- Your partner sees a small snapshot: your phase, cycle day, and the next phase and date. Not your notes.
- Extras like a “possible fertile day” flag, or a paused or pregnant flag, are off unless you turn them on.
- Weekly check-ins are shared only when you tick “share” on each one.
- Unlink or delete your data and what was shared is removed. You stay in control.
Meal ideas
What to eat, for the week you’re in.
Simple ideas that change with your phase, so “what’s for dinner?” has one less decision in it.
The Reset
- Ginger or peppermint tea
- Warm soups and broths
- Iron-rich foods like lentils and spinach
- Dark chocolate
The Climb
- Eggs
- Lean chicken or fish
- Avocado
- Yogurt or kimchi
The Peak
- Broccoli and leafy greens
- Berries
- Light, fresh meals
The Dip
- Avocado and olive oil
- Nuts and seeds
- Protein-forward meals
- Low-carb vegetables
The Guardrail
- Sweet potato and squash
- Dark chocolate (70%+)
- Berries
- Magnesium-rich foods
Tell it what’s in your kitchen.
Say which ingredients you have, and the guidance chat suggests a meal you can make, matched to your phase. Less deciding, less waste.
Illustration · Guidance chat
I have chickpeas, spinach, rice and a lemon.
Warm chickpea and spinach rice bowl. Easy tonight, and a cosy fit for The Reset. Squeeze the lemon over at the end.
Ideas for general wellness, not nutrition or medical advice. Check with a doctor or dietitian if you have a health condition or special diet.
Privacy first
Your cycle data stays on your phone.
No ads, no trackers, no analytics, and we never sell data. Here is exactly what stays and what leaves.
Stays on your phone
- Your cycle history, notes, daily logs and settings
- Your calendar, if you connect it. It’s read on the phone.
- Your app lock, with biometrics
Leaves your phone only when you use it
- AI chat text. Your messages go to our server, which asks Anthropic’s Claude to write a reply. We don’t store chat content.
- Local ideas. The city and interests you choose are used to look up events. We never ask for your location.
- Weekly Compass. A busy score (0 to 3) and an “away” flag for each day, plus your phase. Never event titles, places or people.
- The small snapshot you choose to share, if you link a partner
- An optional encrypted cloud backup, locked with a passphrase only you know
No location permission of any kind. Export a backup, or erase everything, in Settings. Read the full privacy policy.
A note on safety
A conversation aid, not therapy.
Cycle Pair shares general wellness information, not medical advice or therapy. Phases and dates are estimates and shouldn't be used to avoid or plan a pregnancy. If you're unsafe, contact local emergency or support services.
Cycle Pair can help two people talk. It can’t fix a relationship, and it isn’t the right place for a crisis. If someone isn’t safe, please reach out to real help.
Join the beta.
Cycle Pair is in closed beta on Android first, and it’s free. Leave your email and we’ll let you know when your spot opens. iOS follows.
We’ll only use your email to tell you about the beta.