Vas Sanctum
Your body,
the sacred vessel.
Know your phase, eat for it, train for it — and understand the astonishing biology beneath it. A private cycle and body tracker that never leaves your phone.
Know where
you are.
Which phase you are in, how much of it is left, when ovulation and your next period land — and what your body is actually doing inside it.
The reset. Your body is shedding the lining it spent a month building and beginning again.
Then what to do
about it.
Guidance tuned to the phase you are actually in, one line at a time — what to eat, what to ease off, how to train, how to sleep. Every item opens to explain itself.
Ease off fasting — iron absorbs better when it has food alongside it, and the body is actively repairing right now.
A month, at a glance.
Tap any day to log flow, symptoms and notes. Colour is the phase. The small disc is the moon that night. Days still ahead show as outlines — predicted, not promised.
What your body is doing, and why.
Five threads, written to be read rather than skimmed — the cycle and its four seasons, and the four things the body was built around.
Your patterns,
not averages.
Energy, sleep, mood, skin and the moon, laid over your own phases. What your own logged days say, phase by phase. Nothing borrowed, nothing guessed — only what you actually recorded.
Track only what
you want.
Body and mood, energy, cravings, food, movement, inner weather, desire, gut — turn each one on or off, and add your own. Nothing logged is ever deleted.
One tap out.
Every day you've logged — flow, symptoms, energy, notes — exports as a single file, whenever you want it. Hand it to your doctor. Feed it to your own AI. It was always yours; this just makes it portable.
What's actually different.
Common questions.
Why isn't it in the App Store?+
It doesn't need to be. Vas Sanctum is a web app — you add it to your home screen straight from the browser, it updates itself, and there is no store account in the way. It is also why your data has no reason to leave your phone.
Do you see my data?+
No. Everything you log stays on your device. We never see it, store it, or sell it — to anyone.
Do I need to make an account?+
No. Open the app and start logging. Nothing to sign up for.
Is it really free?+
Yes. The tracker and every Learn article are free, with no paywall. If it helps you, there's an optional way to support the work — never required.
Can I get my data out?+
Yes. Export it any time — hand it to your doctor, feed it to your own AI, or just look through it yourself. It was always yours.
Does it work without signal?+
Yes. Once it's open, everything works offline — logging, your calendar, the Learn articles, all of it.
Add to your home screen
Vas Sanctum installs straight from your browser — no store, no account, about ten seconds. You get a real app icon that loads instantly, opens full-screen and works offline.
- Tap Share in Safari
- Tap Add to Home Screen
- Tap Add
- Tap ⋮ in Chrome
- Tap Install app or Add to Home Screen — depends on your phone
- Tap Install or Add
Everything stays on your device. We never see your data, share it, or sell it — to anyone.
Vas Sanctum offers general wellness information — not medical advice, and it is not a contraceptive. Cycle, ovulation and fertile-window predictions are estimates only.