How Aqoir reads your hydration.
A fingertip, a beam of light, and models trained on more than a million data points.
01The sensor
Light reads what thirst can’t.
Rest a fingertip on the cap. Light at several wavelengths passes into your skin, and the sensor measures how much returns with every heartbeat. That signal, your pulse wave, shifts with the water in your blood and tissue.
02The models
From pulse wave to Hydration Index.
Each reading moves through three steps, from the cap to your phone, in seconds.
- 1 · Collect
The cap listens
The sensor records your pulse wave and sends it to the Aqoir app.
- 2 · Analyze
The models read it
Our models pick out the features of the waveform that track hydration, learned from more than a million data points.
- 3 · Predict
You get a score
Your Hydration Index, from 1 to 4, appears in the app, along with what to do next.
03Ground truth
Tested against the lab standard.
Every model is checked against urine specific gravity (USG), a clinical measure of hydration. Under Protocol v7, volunteers move from dehydrated to rehydrated across a series of sessions, so the models learn the full range.
Dehydrated→Rehydrating→Hydrated
04Accuracy
Every model, closer to the truth.
We measure each generation of our models against lab results. Each one agrees with the lab more closely than the one before.
Agreement with lab ground truth
Yampa
Our first-generation model.
Rio Grande
Closer agreement with the lab for most volunteers.
Rio Grande 2.3
Trained on Protocol v7 data.
In development
05Your normal
Built around you.
Aqoir learns what normal hydration looks like for you. It accounts for your age, the heat, humidity and altitude around you, and how active you’ve been, then combines all of that with your personal reading.
- Age
- Heat
- Humidity
- Altitude
- Activity
+ Your reading→ when to drink, and how much
The Aqoir app nudges you when it’s time to drink and how much, so you don’t have to think about it.
06Beyond hydration
One touch. More than hydration.
The same pulse wave carries other signals. From the same touch, Aqoir also reports your blood pressure, heart rate and blood oxygen.
Blood pressure
Systolic and diastolic, without a cuff.
Heart rate
Beats per minute, from the same reading.
Blood oxygen
SpO₂, tracked over time.