Reliability
Reliability you can understand.
Daysy is built on three pillars: scientific evaluation, a precise sensor, and a smart internal algorithm — working together to support clearer cycle awareness.
Scientific study
Daysy is grounded in scientific evaluation. Independent research has examined how the device supports fertility awareness, building trust through transparent, evidence-informed development.
Precise sensor
Inside the device sits a precise sensor designed to measure basal body temperature with fine sensitivity — the foundation for meaningful daily insight.
Smart internal algorithm
An internal algorithm interprets your temperature direct to support fertility insight and to indicate fertile and non-fertile days within your cycle.
Scientific study
Grounded in evaluation.
Daysy has been examined in scientific work focused on cycle observation and fertility awareness. This evidence-informed foundation is part of how Daysy builds trust — by showing its work, not by making promises.
- Evidence-informed approach to cycle awareness
- Transparent about what the device is designed to do
- Continually refined as understanding evolves
Precise sensor
Engineered for small shifts.
The Daysy device contains precise sensor technology developed to measure basal body temperature. Small shifts in temperature can carry meaningful information about your cycle — the sensor is designed to capture them clearly, morning after morning.
Smart internal algorithm
Insight, refined over time.
Your daily measurements feed an internal algorithm that supports fertility insight. From the first period confirmation, it helps indicate fertile and non-fertile days within your cycle, giving you a clearer view of the patterns that are uniquely yours.
Why this matters
Reliability you can feel in daily life.
Confidence
A trusted process — sensor, algorithm, and study — supporting how you read your cycle.
Better cycle awareness
Clearer signals each morning help you notice the patterns of your own body.
Informed personal insight
Understand your fertile and non-fertile days, ovulation and rhythm with greater clarity.
Privacy note
Reliability and privacy go together.
In the Daysy ecosystem, trustworthy technology and respect for your data are built together. Your measurements stay protected, you choose when to sync, and personal data is not automatically shared with outside parties. Reliability is meaningful only when your privacy is safeguarded alongside it.
Daysy is a fertility tracker designed to support cycle awareness. It is not a contraceptive and does not diagnose, prevent or treat any medical condition.
Ready for clearer cycle awareness?
Built on science, precision, and respect for your privacy.