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Train with the world's greatest athletes, discover their methods, and learn their approach to create lasting habits with just 4 weeks of guided, on-demand training.

To be the best, you have to train with the best. Masters is the only platform where the world's greatest athletes – from Olympic golds to world champions – become personal trainers at your fingertips.

To reach the pinnacle in their sports, Masters athletes Kai Lenny and Nic von Rupp have developed methods of training their physical strength, endurance, and balance as well as mastering and optimizing their life practices to unlock peak performance.

Join Masters athletes for 4-week challenges of guided, holistic training – including strength and conditioning workouts, balance and mobility challenges, and mental wellness sessions, as well as life lessons and hacks.

Enhance body and mind with a wide variety of guided sessions, including bodyweight strength training, flexibility and mobility, and cardio and conditioning, as well as mental sessions dedicated to mindfulness, focus, and the philosophical approaches unique to each Masters athlete.

Follow clear, highly-structured programs to maximize results in 4 weeks. The cadence and flow of sessions also ensures proper warm-up and warm-down, as well as allotting time for designated recovery sessions.

Experience training programs developed by world-class athletes and experts, optimized to deliver results and improve fitness across all facets. The same experts join you in the app to answer questions, give further insights, and motivate you to unlock your best self with lasting habits.

Train together, celebrate together! Connect with others following the program and track progress together, providing a much-needed dose of social interaction while also building sustainable habits through peer-to-peer accountability.

Train anytime, anywhere, with daily objectives tailored to your goals. Most sessions require minimal equipment and can be performed in a variety of spaces, and any equipment needed will be listed out before starting any program to make sure it's the right style for you.


“Masters – Kai Lenny” is designed for the adventure-seekers who want to improve versatility and performance across any action sports. Born and raised in Maui, Kai is the definition of a modern waterman, competing at the highest level in multiple disciplines of wind and water sports. By combining Kai’s unique physical training regimen alongside his “kill your ego” philosophy, you will learn to expand, adapt, and adjust your approach to fitness, sports and general wellbeing. Kai’s program is broken down into three 4-week blocks.

Kai's entry-level program is designed to build foundational strength, mobility, and agility, while introducing his philosophies behind setting goals and setting ego aside.

The next level is all about progressive strength. Work on perfecting form while stepping up the intensity, and learn how to use meditative flow states to push yourself further.

Kai's most advanced program is intended to break barriers, bust ceilings, and leave your goals in the dust. All out strength and conditioning will demand everything you've got!


As a 2X WSL Big Wave Performance of the Year Finalist and Top 10 Big Wave Tour surfer, Nic von Rupp knows a little something about finding his peak. Join Nic for 30 days and discover his methods, routines, and insights. Improve physical strength, enhance balance and coordination, and discover the mindfulness and mental strength needed to perform in the spotlight and unlock your best self.

Please note: Subscriptions renew automatically. You can cancel anytime in your Apple ID subscription settings. Any unused portion of a free trial will be forfeited if you purchase a subscription. Terms: https://www.mastersapp.com/terms-of-service Privacy Policy https://www.mastersapp.com/privacy-policy

What’s New

Version 1.4.14

Train with the world's greatest athletes, discover their methods, and learn their approach to create lasting habits with just 4 weeks of guided, on-demand training.

In this update:
- Performance improvements
- Improved end of workout experience
- Bug fixes

Ratings and Reviews

4.7 out of 5
39 Ratings

39 Ratings

HM&hm ,

Reach your goal easier!

It’s always easier to work for a goal together as a group. Where you can get some inspiration and motivation from people who are working towards the same goal as you are. People that knows the struggles that comes with being persistent with your training. I also like this program because it puts in meditation and goal settings as a workout, which made a big difference for me. That helped me to remind myself why I’m working out, what I want to accomplish with my training and how I want to feel working for my goals.

Mulloons ,

Great Training Program!

I was looking for a way to get in shape for a surf trip without being able to surf before I left. Surfing is all about time on the water but sometimes you can’t find the time! This program was an incredible jump start to get me into paddle shape and surfing shape. I like the social component as well because you feel like you’re in it together. I’ve never felt so motivated to stay on track with a fitness program as I did with this. And it got me where I needed to be!

cali_megs ,

Cool new way to train

I’m a fair-weather, foam board surfer, but training with Nic inspires me to take it to next level. Learning about how he trains is inspiring, and the exercise program has me working out in a new way. Love how it’s organized and keeps me accountable. After a few weeks, I can already tell it’s going to make me stronger and more confident in the water. I’ve been surprised by how connected I feel with the other members in the group. Kind of cool to be going through this experience with other people.

App Privacy

The developer, myCrew, Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Usage Data

Data Linked to You

The following data may be collected and linked to your identity:

  • Contact Info
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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