Muscle Mastery
by L8R Lifestyle, LLC more by this developer →
#117,232 of 726,788 by ratings on Apple · #6,690 of 51,410 in Health & Fitness
First seen by this census 09/05/2026 — the store does not publish a creation date
Last updated 09/11/2026
Tracked since 09/05/2026
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Category: Health & Fitness
Description
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.
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Growth
Change in ratings, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.
| Per | Growth | Growth % | Actual change | Measured over |
|---|---|---|---|---|
| day | Not enough history yet | |||
| week | 0 | — | 0 | 9.7 days |
| month | Not enough history yet | |||
| year | Not enough history yet | |||
History
Ratings
Average rating
Version history
| Version | First observed |
|---|---|
| 8.18.7 | 09/11/2026 |
| 8.18.4 | 09/12/2026 |