Black Night
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RFS 001-04 · September 2026

Health data you can act on

People track everything and understand nothing. Turn personal health data into decisions.

The problem

Wearables, apps and blood tests produce more personal health data than ever — but almost none of it turns into clear, trustworthy decisions about sleep, training, diet or when to see a doctor.

What we want to see

  • Products that turn data into one clear next action
  • Responsible AI with evidence behind it
  • Privacy by design — users own their data
  • Clinics, coaches or employers as paying customers welcome

Who should build it

Engineers, data people and anyone with a health or sports-science background.

Signals we look for

  • Users changing behaviour because of it
  • Clinicians or coaches involved
  • A defensible data advantage

Ready to build? Apply now.

Five minutes. No CV. Every application is read by the founders.