You're not reaching
muscle failure.

Automatic exercise detection, rep counting, and failure tracking — powered entirely by the motion of your Apple Watch. So you can focus on the lift, not the log.

Download on the App Store
9:41
Riven
Last session
Push day
12
SETS
96
REPS
84%
AVG
Start
Listening
Auto-detected
Bench
press?
Set 2 of 3
Yes, that's right3s
Bench · Set 2
0:42
148
BPM
−18%
VEL
8
reps
0 %
Very close to failure
✓ Confirm
± Fix
Meet Riven

Muscle failure,
measured from your wrist.

Scroll
01Walk in

Walk in.

Leave your phone in the locker. Riven runs entirely on your wrist — no setup, no straps, nothing to forget.

02Lift

Lift.

Riven sees your set start — reading motion, heart, and rhythm a hundred times a second from your wrist.

03Bench press

Riven recognizes the movement.

It's bench. No taps, no menus. The watch face just knows — and starts logging.

04Reps, counted

1. 2. 3.

Every rep, on your wrist. Velocity, heart rate, and HRV logged for every one — silently, without a single tap.

05The moment

87

True failure.
Now you know whether you finished the exercise — or whether next set, you go harder.

06Repeat

Rest. Next set.
Repeat.

Riven handles every set, every exercise, every workout. You never touch a thing.

9:41
9:41
Friday · push day
Ready
Set 1 · recording
Detecting…
Detected
Bench
press
Set 1
Bench press · Set 1
0
108
BPM
−2%
Velocity
Failure score
0
True failure
38%
v-loss
172
HR
−24
HRV
Rest
1:30
Next: Set 2
The science

Most lifters stop 4 reps too early.

The fibers that grow only fire in the last few reps before failure. Riven is built to find them — and to tell you, every set, whether you got there.

Where most people stop
RPE 7 · "felt hard enough"
True failure
The next rep can't happen
REP 1 REP 5 REP 10 0 1.0 VELOCITY (m/s) WHERE MOST STOP Rep 6 · −12% velocity TRUE FAILURE Rep 10 · −38%
After the workout

Every muscle. Every score.
Every plateau, finally explained.

Riven shows you the truth — per muscle group, set by set. Over weeks you stop guessing. You see exactly where the work is landing, and where it isn't.

9:41
FRIDAY · PUSH DAY
Today's failure
91 CHEST 82 TRICEPS 61 SHOULDERS — CORE · REST
THIS WEEK
M
67
T
—
W
84
T
—
F
91
S
•
S
—
The hardware

No straps.
No clips. No cameras.
Just the Apple Watch you already own.

Chest strap
Camera
Barbell clip
EMG patch
9:41
Riven

Built for people who train. Not for people who post.

Find your failure.

Download on the App Store
watchOS 10+ · iPhone companion · free during early access
Riven