Riven

Riven turns your Apple Watch into a muscle failure tracker. It auto-detects your exercise, counts reps hands-free, and measures rep speed loss — the science-backed signal of true muscle fatigue — to tell you if you actually trained to failure or stopped reps short. Built for hypertrophy and strength training: no camera, no bar sensor, no extra hardware — just the watch you already own. Get a 0–100 failure score after every set, so every workout drives real muscle growth.

Riven has been live since June 11, 2026 (recently). It operates in the Fitness, Wearables, and Activity tracking sectors. As an emerging startup, it has accumulated 78 votes and 12 comments to date.

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