Intero

Intero: Athlete OS · private beta

Every product in sport is a tracker with opinions. Intero is an instrument.

Your ring, your strap and your watch each tell a different story about last night. Intero puts them in one court, measures how noisy each one is, and gives you a single estimate with an honest error bar. When the evidence isn't good enough, it says so, and tells you why.

How it works Read the methodology

Sensor Court, in one picture

Warm marks are what a device measured. The cool band is Intero's estimate. Hatched means Intero declined to give a number.

Sensor Court, one night, illustrative figures An illustration with made-up numbers. Three devices report overnight HRV: a ring reads 49 ms, a strap 53 ms, and a watch 64 ms. Each reading is a warm dot with a whisker for its own noise. The watch disagrees too much with the other two and is overruled, drawn hollow. The ring and strap are fused into one cool band: 51 ms, 80% band 48 to 54 ms. Below, sleep efficiency is refused and drawn hatched, because the devices define it differently. One night of HRV ILLUSTRATIVE, NOT REAL DATA Ring 49 ms Strap 53 ms Watch overruled 64 ms Verdict 51 ms, band 48–54 40 50 60 70 ms Sleep eff. Refused: the devices define it differently.
warm: measured by one device cool band: Intero's estimate hatched: declined, with a reason Illustrative figures, made up for this drawing. Not anyone's data.

What it does

The five laws

These are enforced by types and tests in the code, not by good intentions.

  1. Every number has a receipt. The input readings, the source devices, the algorithm and its version.
  2. Every number has an error bar, or a typed refusal. A missing input is never scored as zero.
  3. Every forecast names the observation and date that will settle it.
  4. The athlete owns the record. Your data is yours, and export works from day one.
  5. Language models are the voice, never the source. An assistant may speak for Intero only by citing receipts.

Private beta on TestFlight

Intero: Athlete OS for iPhone and Apple Watch is in a small, private TestFlight beta. It is not on the App Store yet. Each athlete's data lives on a server run for them; nothing is shared between athletes.

Invitations are by request: write to support@endurosync.com.