Generic trackers treat every day the same.
Purple knows your biology is dynamic.
By syncing with your iOS Health data, we turn your hormonal shifts into actionable recovery steps. Master your Luteal phase with custom cooling and energy-saving protocols designed for exactly where you are in your cycle.
Reclaim Control.
Energy crashes aren't a weakness; they're a biological phase shift. We predict your Luteal drops so you can adjust your load before it hits.
Why your sleep quality
changes with your cycle
Traditional trackers treat every day the same. But your body doesn't. Hormonal shifts during your menstrual cycle directly impact core temperature, HRV, and sleep architecture.
Social Jetlag
When your schedule fights your DNA, your system suffers chronic oxidative stress. Purple calculates the exact offset.
HRV Decay
Your Heart Rate Variability doesn't lie. Shifting sleep patterns crashes your HRV, signaling urgent recovery needs.
Core Sleep Deficit
Duration is a myth. Timing is everything. Stop chasing 8 hours and start optimizing your Core Sleep windows.
References: PubMed ID 31105044 • Chronobiology International (2019)
Eight Lunar Guardians
Your sleep guardian adapts to your cycle. Each archetype offers different wisdom during follicular vs. luteal phases.
Dawn Whale
Follicular Energy Peak
Polar Bear
Luteal Grounding
Night Leopard
Luteal Precision
Morning Butterfly
Follicular Transformation
Sunrise Lion
Ovulation Power
Misty Deer
Menstrual Recovery
Midnight Fox
Luteal Adaptability
Starlight Firefly
Menstrual Renewal
Identify Your
Genetic Baseline
This is a 3-axis heuristic approximation of your biological hardwiring. For absolute precision, sync your Apple Health payload.
Join the Circle
Purple is currently in stealth R&D. Connect your Apple Health data to request early pilot access.