Launching today
Riven
Your Apple Watch knows when you've truly hit muscle failure
49 followers
Your Apple Watch knows when you've truly hit muscle failure
49 followers
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.
Fun! Congrats on the launch :) Does it work best for upper body vs lower body given the wrist-movement-based tracking?
@ferdi_sigona Great question! Currently, the app supports exercises that involve upper-body or wrist movement, as well as some lower-body movements like squats (since your body moves up and down). However, exercises where your wrists remain stationary—such as the leg curl machine—cannot be tracked automatically. You can still log these exercises manually to ensure your entire workout is recorded!
minimalist phone: reduce your screentime
Is it "pairable" with any smart device, like rings or watches?
@busmark_w_nika Hi Nika! For now, it supports Apple Watch only, and the workout data is synced with your Apple Health app.
Do I have to have a ceratin routine programmed in?
@st1100 Nope, you go to the gym, do whatever you want, and it shall detect it. You can still manually input what you want to do, or build a program if you want. But usually I go to the gym with a program only in my head; I don't need to write it down in an app - and sometimes my plan changes based on what machines are available if the gym is busy.
The science behind rep speed loss is solid. What was the biggest challenge in getting reliable failure detection from just an Apple Watch?
Wish there was something like this for Android.