All in one, for every week of you.
CYCLE TRACKING
Log your period, symptoms, energy, and mood. The deterministic engine maps your unique cycle.
CYCLE INSIGHTS
Know exactly which stretch you're in, and what your body needs in each one:
| Aura name | Cycle phase |
|---|---|
| Rest & Renew | Menstrual phase |
| Follicular Rise | Follicular phase |
| Ovulation Glow | Ovulation |
| Luteal Flow | Luteal phase |
| Reflect & Rest | Late luteal (premenstrual) |
PERSONALIZED GUIDANCE
Daily recommendations for training, nutrition, social plans, and big meetings — timed to your cycle, not a generic calendar.
ENERGY & MOOD
Track energy and mood every day. See which days you feel strong and which days you need to slow down, so you can plan around what your body actually does.
JOURNAL & REFLECT
A private space to log how you actually feel — not how you should feel. Your notes build a personal playbook over time.
"I was lifting weights. The next day I couldn't hit the same bar. I checked my cycle. Different phase. That clicked."
Why I built this
Hi. I'm Lisa Cheng. I build companies, most recently Arithmancy, a robotics data platform. Aura Cycles came from something smaller. I was at the gym lifting weights. The next day I couldn't lift the same bar. I checked my cycle and realized I was in a different phase. That clicked. If I could map my cycle to what my body could actually do, I would stop second-guessing myself.
I couldn't find a tracker that did this without charging $200 a year or collecting my data. So I built one over a weekend with an AI agent. Fully deterministic. No AI guesses. No server storing your information. Everything lives in your browser. Open source and free.
To install: use your browser's menu → "Add to Home Screen" (iPhone: Share → Add to Home Screen). No app store needed.
Everything lives in your browser — we store nothing, we sell nothing, we don't even have a server to put it on. No login, ever.