Yori is a cycle-awareness app for men. Science-based guidance on each phase, personalised daily insights, and honest information about conditions like PMDD and endometriosis — so you can show up with the right kind of care, without guessing.
Download on Google Play Free to download · No account required · Android 7.0+What Yori is
Most men know the basics. Period, mood changes, move on. The reality is more detailed than that — and more useful to understand.
The four phases of the menstrual cycle each have distinct hormonal profiles that affect energy, mood, communication, and physical comfort. Understanding this doesn't require a medical degree. It requires a decent explanation — which is what Yori provides.
This is not about prediction or timing. It is about having enough context to respond well — because you understand what she may be going through, rather than guessing or getting it wrong.
Everything stays on your device. No accounts. No data sold. Yori is a private tool for becoming more informed.
Accurate, science-based information on each phase — what's happening physically, what she may be experiencing, and what that means practically today.
AI-powered guidance tailored to her current phase, any health conditions, and what you've logged. Gets more specific the more you use it.
In-depth guides for PMDD, endometriosis, PCOS, heavy periods, perimenopause, and menopause — written specifically for partners and family members.
Support a daughter or sister with age-appropriate guidance. Light touch mode keeps things low-key — no period logging, just phase awareness and tips.
What's in the app
Yori is built around one purpose — giving men accurate, useful information about the cycle so they can respond better to the people in their lives.
Phase predictions anchored to the luteal phase — more scientifically accurate than most consumer apps. Improves with each cycle logged.
Personalised guidance generated daily using her phase, health conditions, and your logged notes. Learns from your feedback over time.
Quick-tap mood and symptom logging. Written notes. Automatically tagged to the correct phase. Builds a picture of her individual patterns over time.
Useful context at the right moment — not reminders to open the app, but timely information about where she is in her cycle today.
PIN-protected with AES-256-GCM encryption. Your data never leaves your device. No accounts required. No tracking.
Support a partner, daughter, and sister simultaneously. Up to 5 profiles with Premium. Each with their own history, notes, and guidance.
The four phases
Each phase has a different hormonal profile that affects energy, mood, and physical comfort differently. Yori explains what each phase means in practical terms — what she may be experiencing, and what that means for you.
The womb lining sheds. Energy is often low. Cramps and tiredness are common. Practical support without fuss is what matters most.
Oestrogen rises and energy lifts. Mood often improves noticeably. A natural week for plans and being genuinely present.
Mid-cycle, many women feel their best — confident, sociable, energised. A good week to be fully present and engaged.
Hormones drop in the run-up to the next period. PMS is real and physical. Steady, low-pressure support is what helps most.
Privacy
Cycle data is among the most sensitive personal information that exists. Yori was designed from the start with a clear principle: the data you enter stays on your device, encrypted, and under your control.
We do not sell data, run ads, or build user profiles. Yori is funded entirely by Premium subscriptions. That is the only business model.
The only data that ever leaves your device is anonymised cycle context used to generate AI insights — and even that is never stored after the request completes.
Read the full Privacy Policy →Encrypted on your deviceAES-256-GCM encryption with a key derived from your PIN. Unreadable without it.
No accounts requiredNo sign-up. No email. No profile. Yori works without knowing who you are.
AI insights use anonymised context onlyPhase, condition, and note content — never names, dates, or anything identifying.
Analytics are aggregate counts onlyWe know how many people opened a tab. We do not know who, when, or what they saw.
No ads. Ever.Yori is not ad-supported. No advertiser has ever paid to appear in this app and none ever will.
About Yori
Most men want to be supportive. The problem is not intent — it is information. A woman's cycle affects her in ways that are real, physical, and predictable, but that most men have never been given a clear explanation of.
Yori is an attempt to close that gap with something honest and genuinely useful — not a tracking tool, not a lifestyle app, not a way to predict or time anything. Just accurate information and practical guidance.
The best version of this app is one she knows about. Most people react well when they find out. It tends to open a good conversation rather than close one. Yori is designed to work with openness, not instead of it.
Yori is not for men who want to use cycle data to pressure, time, or manipulate anyone. If that is the intent, this is the wrong app.
"Yori (より) — a Japanese word meaning beside, from, and together with."
The idea of being genuinely close to someone — present with them, not observing from a distance.A note on consentThe person you are supporting has not formally agreed to this app. Use it with honesty and care. Being open about it is almost always the better choice — and usually leads to a better conversation than you might expect.
Not a medical deviceYori does not provide medical advice. Cycle predictions are estimates only and must never be used as a contraceptive. Always consult a healthcare professional for medical concerns.
Available now on Android
Free to download. One profile, core features free forever. Premium unlocks personalised AI insights, multiple profiles, and push notifications.
Download on Google Play Free to download · No account required · Android 7.0+Yori is a wellness and education tool — not a medical device. Cycle predictions are estimates only and must never be used as a contraceptive. Always consult a healthcare professional for medical concerns.