Our mission
Progress shouldn’t cost you your health.
Women are striving to achieve more while learning to understand bodies that change from week to week. Sleep, iron, hormones and fatigue all shape what you can take on, and working that out alone is guesswork. The uncertainty is its own source of stress, and most training apps don’t help: they chase one number and miss the warning signs.
RETO exists to take that uncertainty away. We understand your body, so you don’t have to carry it all yourself.
From the founder
By 24, I thought I was doing everything right: training hard and pushing my career in London. But my body paid for it. Severe period pain, exhaustion, low iron and one injury after another, on top of living with PCOS. It took me over two years to recover. The warning signs were there, but no doctor, device or app joined the dots early enough.
Since then, as a mechanical engineer turned data scientist, I’ve worked with Olympic and professional teams, building data products their coaching and medical staff use every day. Elite athletes get that whole team. Everyone else gets a template. So I quit my job to build RETO full time.
RETO is the app I wish I’d had. Whether you’re running, cycling, swimming, strength training or doing them all, you deserve one plan built around your body. And when you build for women first, you build better for everyone.
Jess
Jessica Eichel on LinkedInWhat I’m building it to do
-
Join the dots early.
Spot fatigue building faster than fitness, poor sleep or a shift in your cycle before it turns into an injury.
-
Take the guesswork out.
One plan that weighs every goal against your health, so you are never left deciding alone whether to push or rest.
-
Make room for life.
Holidays, travel and busy weeks at work are part of the plan, not a reason to fall off it.
Train with us first.
Our beta opens in November 2026, with limited spots. Join the waitlist and we will tell you when it is your turn.
Join the waitlist