Riven: Reps & Muscle Failure

Riven auto-counts your reps and scores every set 0–100 for how close you got to true muscle failure — using just the Apple Watch you already wear. Finally know when you've actually trained hard enough to grow. ▶ APPLE WATCH REQUIRED Riven works only with an Apple Watch. Rep counting and muscle-failure detection run entirely on the watch's motion and heart-rate sensors — that is the only hardware Riven uses. You need an iPhone (iOS 17 or later) paired with an Apple Watch (Series 6 or later, watchOS 10 or later). There is no iPhone-only mode — the iPhone app is the companion for setup, history, and plans. WHAT RIVEN DOES ◆ Auto-counts every rep from your wrist — no tapping mid-set. ◆ Auto-detects 30+ exercises — bench, squat, deadlift, curl, overhead press, rows, and more. ◆ Scores each set 0–100 in real time for how close you got to muscle failure. ◆ Color tiers tell you instantly: green (plenty left), yellow (working), orange (near failure), red (true failure). ◆ Shows you per-muscle which groups reached failure each week — and which ones you left in the tank. WHY YOU NEED THIS Muscle growth comes from training close to failure. But "close" is almost impossible to measure on your own. Most lifters stop 4 reps short. They guess. They stop on fatigue or boredom. Without feedback, you systematically under-train — and leave most of your potential growth on the table. Riven puts that same insight on your wrist. Every set ends with a score. Every workout ends with a per-muscle summary. You stop guessing. HOW RIVEN KNOWS The watch reads four signals every set: ◆ Velocity loss — when your reps slow down, your muscle is fatiguing. 100 samples per second from the motion sensor. ◆ Heart rate — every set has a cardiovascular ceiling. From the optical sensor you already wear. ◆ Movement smoothness — neuromuscular control breaks down before strength does. ◆ Rep consistency — variability between reps reveals when your nervous system is losing precision. These combine into a single 0–100 Failure Proximity Score, delivered the instant you tap End Set. WHY APPLE WATCH ONLY No barbell clip. No chest strap. No camera. No EMG patches. Riven uses the sensors you're already wearing. That means it works on every exercise — barbells, dumbbells, cables, machines, bodyweight — not just compound lifts. Nothing extra to remember, charge, or strap on. WHO RIVEN IS FOR Serious lifters who want feedback, not motivation. People running hypertrophy programs who care about proximity to failure. Anyone who's wondered, mid-set, "could I have done two more?" — and is tired of guessing. REQUIREMENTS Apple Watch Series 6 or later. iPhone running iOS 17 or later. watchOS 10 or later. No additional hardware. PRIVACY Riven processes motion on your devices. Heart rate stays in Apple Health. No ads. No third-party trackers. Full policy at riven.fit/privacy. PLANS ◆ Free forever — 1 workout per week. ◆ Pro — 2 workouts per week — $2.99 / month or $29.99 / year. ◆ Unlimited — unlimited workouts — $9.99 / month or $79.99 / year. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions auto-renew unless turned off at least 24 hours before the current period ends. Your account is charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel subscriptions in your Apple ID account settings after purchase. Privacy: riven.fit/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms: riven.fit/terms