Clue has tracked menstrual cycles for over a decade with strong science and privacy. Kairos™ is built for what comes next — when cycles become irregular and the question shifts from prediction to clinical intelligence.
Kairos™ was built by Dr. Shannon Carpenter — a fellowship-trained orthopedic surgeon who runs The Bone Health Clinic — as the patient-facing layer of her deployed clinical system. Four computation engines score symptoms across eight clinical domains, classify reproductive aging through STRAW+10, and flag clinically significant transitions automatically. It tracks both women and men, monitors bone health as a first-class domain, and generates provider-ready reports designed for a 15-minute appointment. Through provider integration, Kairos™ prescribes — backed by continuous clinical intelligence, not a one-time questionnaire. It supports insurance-backed and cash-pay care on the same platform. No other app in this space is built on a live clinical backend, and none of them can replace what takes four or five apps to approximate.
Clue has been building menstrual cycle science since 2012. Their prediction models, ovulation tracking, and cycle pattern recognition are genuinely best in class for reproductive-age cycle management. That's a hard moat to replicate.
Berlin-based, GDPR-compliant, and one of the few period apps that has publicly committed to not selling user health data. At a time when period tracking apps face serious legal and political scrutiny, Clue's privacy stance is a real differentiator — not marketing copy.
Clue Plus connects to Oura, WHOOP, and Fitbit to pull sleep, temperature, and heart rate into cycle context. Useful for cycle-aware biometric tracking in reproductive years.
Clue's Perimenopause Mode is a paid extension bolted onto a cycle tracker. That architecture tells you everything: perimenopause is a feature in Clue's world. In Kairos™'s world, it's the whole product. Kairos was built from day one for midlife hormonal health — perimenopause, menopause, and testosterone decline — by a physician who treats these patients clinically every day.
Clue can flag that your cycles are getting longer or more variable. Kairos™'s STRAW+10 staging engine cross-references cycle variability with vasomotor symptom onset, sleep decline patterns, and domain scoring to classify your reproductive stage — and generate a report your doctor can act on. There's a difference between noticing a pattern and interpreting it clinically.
Kairos™ scores across eight clinical domains — vasomotor, mood, cognition, sleep, genitourinary, musculoskeletal, metabolic, and breast health for women; a parallel eight domains for men. That's not a log. It's a clinical score that shows trajectory over time, identifies which domains are driving burden, and surfaces when a transition is clinically significant. Clue logs symptoms. Kairos interprets them.
Kairos™'s Event Detection engine monitors for threshold crossings across all four computation systems simultaneously: Symptom Burden, Cycle Variability, STRAW+10 staging, and longitudinal trends. When something matters clinically, Kairos flags it. Clue has no equivalent — it shows you your data, but it doesn't tell you when your data crosses a line that warrants attention.
Kairos™ is the patient-facing side of the same system that powers The Bone Health Clinic's provider tracker — with therapy lifecycle management, care management billing, and EHR integration already in production. When Kairos generates a report for your doctor, it's designed by a physician who reads these reports clinically. Clue has no provider integration layer.
Kairos™ tracks testosterone decline, andropause, and men's midlife hormonal health across eight clinical domains. Clue is a menstrual cycle tracker. Men's health is simply outside its scope.
Kairos™ supports both insurance-backed care (through provider integration) and direct cash-pay programs. That's the product of building on top of a deployed clinical billing system — not a consumer app. Clue has no insurance or provider billing pathway.
Clue is a genuinely excellent cycle tracker — science-backed, privacy-first, and 12 years deep in menstrual cycle data. If you're in your reproductive years managing cycles, fertility, or ovulation, Clue is hard to beat. But Clue's DNA is the menstrual cycle. Perimenopause is a paid add-on to a product designed for reproductive-age health. Kairos™'s DNA is midlife. It was built from scratch by Dr. Shannon Carpenter — a fellowship-trained orthopedic surgeon who runs a bone health clinic — specifically for the years when cycles start changing, symptoms accumulate across eight clinical domains, and what you actually need is not cycle predictions but clinical interpretation. Clue can tell you your cycle is irregular. Kairos can tell you you're in early perimenopause, show you which symptom domains are driving your burden score, flag the transition clinically, and hand your doctor a report they can use.
Kairos™ tracks, scores, and interprets the symptoms of midlife hormonal change — for both women and men.