In Zone. On Purpose.

Nobody cheats their intervals. Everybody cheats their easy days.

Twenty minutes in, easy drifts to tempo, and the 80% that builds your base quietly stops happening. HOLDR watches your heart rate and backs the resistance off the moment you leave the zone, no matter what your ego says.

Meet HOLDR
Heart-rate guidedSmart-trainer control

Easy is a discipline

Tempo feels productive. That’s the trap.

Hard enough to wear you down, easy enough to prove nothing. Easy days are where ego pace does its damage.

Stop riding at ego pace.

A real ride in HOLDR

The trainer does not negotiate.

Your heart rate rises. HOLDR backs the resistance off before you get the chance to argue.

HOLDR ride summary showing heart rate held at the 130 bpm target while power adjusts, with 97% of the ride within 5 bpm

A closed loop, without the fuss

Set the target. Leave your ego out of it.

Set your Target Heart Rate and pedal. When your heart rate rises, the trainer eases. When it falls, resistance builds.

01

Set the target.

Choose the heart-rate target you want to hold for today’s ride.

02

Keep pedaling.

As your heart rate changes, HOLDR makes measured resistance adjustments through your smart trainer.

03

Find the target.

The goal is not a perfect line. It is a ride that settles into the work you intended to do.

A room with fewer variables

Hard days hit harder when easy days stayed easy.

Easy is not wasted time. It is the 80% that makes the other 20% possible. HOLDR helps keep it where you planned it.

ConditionsRepeatable
Target effortHeld in Zone 2
What you can seeLonger-term trend

In zone. On purpose.

Ride easy. Actually easy.

Your plan says easy. HOLDR sides with the plan.

Screened TestFlight betaApplications are reviewed individually, and applying does not guarantee access.

EquipmentYou need an iPhone, a heart-rate source, and a compatible FTMS smart trainer or smart bike.

Ride commitmentPlan to complete at least three rides of 30 minutes or longer within 30 days and report what worked or failed.

Required ride sharingBeta rides share eligible heart rate, power, cadence, and app settings under a random identifier.

I understand — apply for the beta

The application opens in Google Forms. Review the privacy policy before applying.