Cycle-aware living
The exhaustion, the brain fog, the days you feel unstoppable — it's not random. Cirén maps your cycle to your daily life so you stop fighting your body and start working with it.
Free early access · No spam, ever
Luteal · Day 26
You don't have
to do it all.
Go inward. Protect your energy
and choose what matters.
Today
The cycle
01
Days 1–5 · Rest & reflect
The body asks for stillness. Energy is naturally low — this is not a flaw, it's a signal. Honour the release.
02
Days 6–13 · Build & begin
Oestrogen rises and clarity emerges. The ideal time to start new projects, make decisions, and move your body freely.
03
Days 14–16 · Express & connect
Peak energy, confidence, and communication. You're most magnetic now — lean into collaboration and visibility.
04
Days 17–28 · Refine & retreat
Progesterone peaks, then drops. Sensitivity heightens — a gift for deep work and honest evaluation, if you protect your energy.
How it works
01
Open Cirén on any browser — no download needed. Enter your period dates and a few daily observations: energy, mood, sleep. Takes under a minute. The more you log, the sharper your guidance gets.
02
Each day, Cirén shows you four tailored insights — what to eat, how to move, what to expect emotionally, and how to approach your work. All based on exactly where you are in your cycle today.
03
Over weeks, the patterns become undeniable. You'll know your high-energy days before they arrive, protect your low ones with intention, and stop being surprised by your own body.
Free to start · No credit card required · Premium features coming soon
Early users
"I always thought I was just bad at being consistent. Turns out I was ignoring half my biology. Cirén made that click in week one."
Sara M.
Beta tester · Madrid
"I've tried three other cycle apps. They all felt like period trackers dressed up. Cirén actually changed how I plan my week."
Laura P.
Beta tester · Barcelona
"The daily briefing takes 10 seconds to read and somehow changes my whole day. I didn't expect something so simple to feel so useful."
Ana R.
Beta tester · Valencia
Our philosophy
Most health apps extract your data and return anxiety. Cirén does the opposite — it takes the complexity of cycle biology and returns it as calm, actionable understanding. No tracking streaks. No shame. No advertisements. Just you and your cycle, in conversation.
No year-long dashboards or data exports. Only what matters today, in this phase, right now.
Every recommendation is grounded in endocrinology and nutritional research, not trends or affiliate products.
Cirén will never monetise your health data, serve you advertisements, or share information with third parties.
Early access
Cirén is free to start — no credit card, no commitment. Join the waitlist for early access and be the first through the door when we launch.
Free early access · No spam, ever