Archived App (Last seen on 17 Apr 2026)

This is an archived listing of the app previously available on the App Store.

Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.

Details

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Muskle screenshot #1 for Apple Watch
Muskle screenshot #2 for Apple Watch
Muskle screenshot #3 for Apple Watch
Muskle screenshot #4 for Apple Watch
Muskle screenshot #5 for Apple Watch
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About

This watch app helps you track time under tension workouts, setting tempo for each movement. It automatically counts reps and allows you to set progressive goals for weight and reps. Your data is securely saved to iCloud and integrates with Apple Health.

Time under tension workout tracking
Customizable tempo for exercises
Automatic rep counting
Progressive weight and rep goals
iCloud data backup
Apple Health integration
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What's New in Muskle

1.2

February 3, 2021

Bug fixes and new features: - Restart a set right after completing it. Great for doing single arm/leg lifts. - Delete completed sets. - Resistance Bands is a new exercise type

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User reviews

Great concept but unusable

Love the idea of this app, but it’s so buggy I can’t use it. Amongst other things, adding a set to an exercise and then modifying the rest/reps/weight scheme is impossible. The “Done” and “x” buttons are unresponsive, meaning I can neither complete nor cancel any attempts to actually include information about my exercises.
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Freeze and I have to force quit.

Freezes and doesn’t “x” or “done” when I try to set the workout sets’ details.

Developer apps

FAQ

What is Muskle?

Muskle is a watch application designed for tracking time under tension workouts. It allows users to set exercise tempos, automatically counts repetitions, and helps users set progressive goals for weight and reps to build muscle.

How does Muskle track workouts?

Muskle focuses on time under tension, allowing you to set the tempo for the extension and contraction phases of each exercise. It automatically monitors your reps as you perform them.

Does Muskle save my workout data?

Yes, Muskle continuously saves your data to your iCloud account, ensuring you never lose your progress. It also integrates with the Apple Health app to log your exercise sessions.

Can I set goals in Muskle?

Yes, Muskle allows you to set goals that automatically increase weight and reps as you achieve higher milestones, supporting your muscle-building journey.

What devices does Muskle support?

Muskle is available for Apple Watch, iPhone, and iPod. It is designed to keep your workout tracking accessible right on your wrist.

Is Muskle free to use?

Yes, Muskle is available for free. There are no in-app purchases or advertisements mentioned in its description.

How often is Muskle updated?

The latest version of Muskle is 1.2, which was last updated on February 3, 2021. This indicates a release cadence of approximately once a year or less.

What is the age rating for Muskle?

Muskle has an age rating of 4+. This means it is suitable for users of all ages, with no mature content concerns.