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
Last · Wed 2:14p
Push day
4 exercises · 11 sets
82
Near failure
Avg · last session
Start workout
Reading motion
Rep velocity ·
heart rate
Auto-detected
Bench
press
Set 2 of 3
Bench · Set 2
8
Reps
148
BPM
−18%
VEL
Set 2 · Bench
0 %
True muscle failure

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 and heart rate 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
Reading motion
Rep velocity · HR
Detected
Bench
press
Set 1
Bench press · Set 1
0
108
BPM
−2%
Velocity
Failure score
0
True failure
38%
v-loss
172
HR
12
Reps
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

Find your failure.

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