Wave reads your bloodwork, your training, your sleep, what you eat and what you take, and returns one age. Not a mood ring: a published model with its arithmetic on the page, and every year of it traced back to the thing that added it.
PhenoAge, when you have the labs, and a lifestyle model built from named cohort studies on top of it. The two are blended 55/45 when both exist, and the lifestyle age answers on its own from the scan, the wearable, sleep, food and training until the labs arrive.
Nothing is invented for a signal that is not there. It is simply not in the sum, and the summary says how many signals the number stands on.
The model wants nine values. With eight it would produce a number that looks identical to a real one and is not, so a panel missing anything returns no lab age at all and names what it is missing, which is exactly what to add to the next draw.
Each signal becomes years by one published rule: adult mortality doubles roughly every eight years, so a hazard ratio is worth 8 x log2(HR) years. The ratios come from named cohort studies, every one is capped, and the lifestyle age stands on its own when the labs are short.
The app re-runs the model with one input moved to the middle of its healthy range and reports the difference. That is what "sleep is costing you 0.4 years" means: a real counterfactual, not a share of a total invented to make a chart add up.
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7 to 8 h. Short sleep carries about 12% more risk, long sleep about 30%. Cappuccio 2010
7,500 a day. A dose-response that flattens out somewhere past ten thousand. Paluch 2022
1 to 2 a week. About 15% less risk, and the benefit plateaus rather than compounds. Momma 2022
60 bpm or below. About 16% more risk for every 10 bpm above 60. Jensen 2013
25 to 29 g a day. About 15% less risk at the range the evidence is strongest for. Reynolds 2019
An illustration, not your Wave Age. It uses the published effect sizes above and one stated assumption, that adult mortality risk roughly doubles every eight years, to turn a hazard ratio into years. The app's own model is weighted differently and leans 55% on nine blood markers. Nothing here is a prediction about any individual, and none of it is medical advice.
The ring on Today is the tent-pole of the app for a reason: it is the one number everything else feeds. Set a target and a date, and the goal line under the ring shows the real figure moving toward it, with the inputs that are pulling it there and the ones holding it back.
Wave Age is a wellness estimate built on published research. It is not a diagnosis, not a prognosis, and not a substitute for your doctor's read of your labs.
Join the list. Bring a recent blood panel if you have one; the lifestyle age answers either way.
Launching in October
Launching in October