# Muskle

> Track time under tension workouts with automatic rep counting and progress goals. (iPhone/iPad app by Kevin Ray.)

- Source: https://appshunter.io/ios/app/muskle/id1539690044 (this page in markdown: same URL + `.md`)
- Developer: [Kevin Ray](https://appshunter.io/developer/416480467)
- Category: Health & Fitness, Lifestyle
- Price: Free
- Rating: 1.00/5 from 3 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 4 MB
- Languages: English
- Released: 2021-01-02
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/muskle/id1539690044/reviews.md

## What is Muskle?

Keep track of all your time under tension workouts right on your wrist. No need to jump back and forth from your phone to your watch as you work out. Muskle is a full featured workout tracking watch app. 

- Create as many time under tension workouts as you want. Set the tempo of each extension and contraction part of the exercise.

- Muskle automatically keeps track of your reps as you do them.

- Set goals that automatically increase the weight and reps as you continually push for higher achievements and gain more muscle.

- Never lose your data as it is continuously saved to your iCloud account.

- Integrates with the Apple Health app to log your exercise.

## Key features

- Time under tension workout tracking
- Customizable tempo for exercises
- Automatic rep counting
- Progressive weight and rep goals
- iCloud data backup
- Apple Health integration

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/muskle/id1539690044/reviews.md

### 1/5 — Great concept but unusable

*2023-06-12*

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.

### 1/5 — Freeze and I have to force quit.

*2023-04-10*

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

## Frequently asked questions about Muskle

### 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.

## Version history (last 3 releases)

### 1.2 — 2021-02-03

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

### 1.1 — 2021-01-09

Updated how you enter completed workout reps and weight.

### 1.0 — 2021-01-02

No release notes.

## More apps by Kevin Ray

- [Color Me Reverent](https://appshunter.io/ios/app/color-me-reverent/id542507709)

All apps by Kevin Ray: https://appshunter.io/developer/416480467

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*