Denshin app icon — a bone face with navy eyes and a white belt

Denshin 伝心

Your heart, on the mat.

Denshin turns the band you already wear into a sparring companion for jiu-jitsu. Double-tap to start a roll. Feel the minutes pass. Get a buzz before you gas out. See how you recovered between rolls.

Thanks — you're on the list. Watch your inbox for the TestFlight link.

iPhone first. We use your email only to send an invite. See our privacy policy.

ROLL 3BAND OK
03:41
TARGET 6:002:19 LEFT
158BPM
CEILING172
Tick · 3 min
Hold to end roll
Roll startedtwo shorts
Roll endedone long
Time tickeach minute rolled
Round timethree longs
Slow downabove the ceiling
Recoveredheart rate is down