What sleep staging can and can't tell you
Drafting
Every wearable reports deep, light and REM. Here is what the research actually supports, and where the numbers are a guess wearing a lab coat.
Blog
Stories from the road.
What we're learning, what researchers say about the things we measure, and why we chose to build Fitfly this way.
In the works
What we're writing first.
Why your step count disagrees with itself
Drafting
Phone, watch and treadmill all give different answers for the same walk. None of them is broken — and the gap tells you which number to trust.
We didn't build social the obvious way
Drafting
A public feed is the easiest engagement win in fitness, and the fastest way to make a rest day feel like a failure. What we built instead.
Nothing published yet.
We’d rather post three things worth reading than thirty worth skimming. The first pieces land around launch.
Something you want us to dig into? Email hello@fitfly.app — a human reads it.
We'll send the first post to the list.
One email when we launch, and the odd piece worth your time after that. Nothing else.