Kettle Muscle
Kettle Muscle

Lift with
intent.

The lifting app that respects what you already know.

Built for people who already train. Plans the next session around the muscles that have actually recovered. Logs every set the instant you tap, with or without signal. No streaks, no feed, no shame.

iPhone. iOS 17 and up.
Today screen — recovery silhouettes, today’s lift, streak.
Plan-session screen — target muscles highlighted in blue, drained in red.
Workout-in-progress screen — set logger with weight, reps, and Log set CTA.
History recovery screen — full muscle silhouettes showing red drained and green recovered.
Today

Recovery, streak, your next lift.

Plan

Targets what’s recovered. Avoids what’s cooked.

Log

Every set. Every rep. Locally first.

See

What your body has been through.

Built for the load
11+Muscle groups trackedPer-muscle freshness. Not a single whole-body soreness score.
0 msWait between repsEvery set lands the moment you tap. Dead-zone gyms included.
YoursYour data, your controlAI is off until you turn it on. Nothing leaves your phone without you.
Plan

It knows what you cooked yesterday.

Every set you log shapes tomorrow's session. Push, pull, hinge, squat, carry — each works on its own recovery clock. Open the app in the morning and the day is already built around what's fresh.

  • Per-muscle freshness. Not a whole-body soreness score.
  • Re-plans the rest of the session when you swap or skip a lift.
  • Suggestions stay grounded in your own history. Never prescribes outside what you've actually done.
iPhone showing the Plan-Session screen with target muscles in blue and drained muscles in red. Real Kettle Muscle screenshot.
Log

Every set, instantly.

Gym wifi cuts out. Subway tunnels happen. Sets still log the moment you tap. When you're back on signal, your history follows you across devices in the background. No spinner between reps.

  • Logs every set instantly, online or off.
  • One-tap log. Big targets. Haptic on every change.
  • Your training follows you across devices once you're back on signal.
iPhone showing the workout-in-progress screen with weight, reps, and a Log set CTA. Real Kettle Muscle screenshot.
See

Honest numbers. No streak badges.

Volume, sessions, PRs, muscle distribution — where you'd expect them, never behind a paywall or a ribbon. The recovery view shows what your week has actually put your body through. Not a generic rest day.

History top — sessions, volume, streak, bests row plus weekly card. Real Kettle Muscle screenshot.
Sessions · Streak · Bests
History middle — weekly volume line chart and personal records cards. Real Kettle Muscle screenshot.
Volume trend · PRs
History recovery — full muscle silhouettes showing red drained and green recovered. Real Kettle Muscle screenshot.
What you cooked
Kettle Muscle

We built the app we wanted.

No streaks. No social feed. No subscription gate on basic logging. Your training, not the app's opinion.