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App Store Apps > Health & Fitness > Muscle Mastery
Muscle Mastery icon

Muscle Mastery

8.18.10
L8R Lifestyle, LLC
4.96
95 reviews
Free

Muscle Mastery Screenshot 1 of 6
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Screenshots by L8R Lifestyle, LLC, from the the App Store listing
View on the App Store Also on Google Play

AppBrain's verdict

Established
Rating on App Store
4.96
95 ratings
Last updated
October 23, 2026
Size
164.1 MB

It doesn't have enough ratings yet to judge what users think.

Official page on the App Store

User feedback

Ratings and reviews on the App Store

Comments on Muscle Mastery for iOS

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Store listing

By L8R Lifestyle, LLC, from the App Store
Description by L8R Lifestyle, LLC Written by the developer, not by AppBrain. Click to read.
Your program lives here. This is where the work happens.
Muscle Mastery is a private coaching brand built by Jeff Later, IFBB Pro, with over 24 years of experience and 8,000+ client transformations. The method is built on four phases: Prime, Prove, Power, Polish. A system designed to change your body and what you believe is possible for it.
If you're a Muscle Mastery client, this app is your home base. Your training program, your nutrition plan, your check-ins, and your coach, all in one place. No confusion about where to go or what to do next. Open the app, follow the plan, submit your check-in, and move forward.

-Access your custom training program with video instruction and exercise guidance
-Log your workouts including weight, sets, reps, and personal records
-Submit weekly check-ins directly to your coach with photos, measurements, and notes
-Reference your nutrition plan and track your daily macros
-Message your coach directly through in-app messaging
-Track body weight, measurements, and progress photos over time
-Check daily habits set by you and your coach
-Get push notifications for scheduled sessions and coach updates
-Connects to Apple Watch and Apple HealthKit, Fitbit, and Withings to sync body stats

This app is for Muscle Mastery clients only.

Safety and technology

Found in the app by AppBrain
Price
Free
App size
164.1 MB
Content rating
Everyone

Technologies used by Muscle Mastery

Releases

Updates seen on the App Store
Version
8.18.10
Launched
September 2021

No changelog data

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Rankings

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App Store Rankings for Muscle Mastery

This app is not ranked

About the app and developer

About Muscle Mastery

Muscle Mastery is a health & fitness app developed by L8R Lifestyle, LLC.

What is the rating of Muscle Mastery?

Muscle Mastery is rated 4.96 out of 5 stars, based on 95 ratings.

Is Muscle Mastery free?

Muscle Mastery is free. The app size is 164.12 MB. The latest version available is 8.18.10. The last update was on October 23, 2026.

What are the requirements for Muscle Mastery?

The app has a content rating of Everyone. The app has been available on the App Store since September 2021.

Muscle Mastery is made and published by L8R Lifestyle, LLC. AppBrain is an independent app data site and isn't affiliated with L8R Lifestyle, LLC. The app name, icon, screenshots and description belong to L8R Lifestyle, LLC and are shown as published on the App Store.

Developer information for L8R Lifestyle, LLC

L8R Lifestyle, LLC

Address:

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