PRETTY MUSCLES by Erin Oprea 4+

Celebrity Trainer

Plankk Technologies Inc.

Designed for iPhone

    • 4.9 • 3.5K Ratings
    • Free
    • Offers In-App Purchases


Here's your chance to train exactly like my clients do! I've been helping country music's biggest stars, like Maren Morris, Kacey Musgraves, Florida Georgia Line, and Kelsea Ballerini, be red carpet ready! Now you can get the same type of training from wherever you are!

I created PRETTY MUSCLES to help you feel your absolute best! You'll get access to daily workouts, including my favorite card game, lots of other fun workout games, and meal plans and recipes that follow my book "The 4X4 Diet". Never again get bored with your fitness routine. I’ll keep you on your toes and smiling every day!

Build PRETTY MUSCLES anywhere
*Workout anywhere with minimal equipment
*Moves & modifications for any fitness level
*Exercise videos with guided voiceovers
*Convenient in-app Tabata timer
*Fun workout games, including my favorite card game

Eat clean to get lean
*Hundreds of recipes that follow my book "The 4X4 Diet"
*Curated meal plans
*Personal macro-calculator
*Grocery list generator & meal delivery integration

PRETTY MUSCLES makes it easier than ever for you to look and feel your best! Move, groove and build with me by downloading PRETTY MUSCLES today!


Payments will be charged to your credit card through your iTunes account at confirmation of purchase. Your subscription will renew automatically unless cancelled at least 24 hours prior to the end of the subscription period.

Subscriptions can be managed and auto-renewal turned off in Account Settings in iTunes after purchase. Once purchased, refunds will not be provided for any unused portion of the term.

Privacy Policy:
Terms of Use:

What’s New

Version 2.7.4

Bug fixes and feature refinements.

Ratings and Reviews

4.9 out of 5
3.5K Ratings

3.5K Ratings

ShanNashville ,

Time Efficient Workouts for Longer, leaner muscles

I’m on day 310 of the pretty muscles app and have watched my body transform. The app is easy to operate, has a great layout, and can be used from anywhere. I initially downloaded the app when I was traveling a lot for work and working out in hotel gyms. The pandemic hit and my driveway with my Erin Oprea app became my workout oasis. I used to be an avid gym goer - paying $170+ per month for bootcamp gyms, yoga, barre, cycling, or kickboxing classes. I’ve truly been to every gym in my city and tried every kind of workout. My body has transformed the most by working out with Erin Oprea in my driveway (not to mention, I have a great tan). I haven’t been in a gym since I became consistent with her app workouts.

I encourage everyone to give this app a try. Use every part of it - the workouts, the games, the playlists, and the recipes.

If you need alternatives to certain moves, she has them in the app. I’ve had reconstructive knee surgery and neck/back sensitivity - I do some of the alternative moves and have achieved great results. I’m proud again to wear a tank top with my arms, I receive compliments on my legs frequently, and I’m no longer tentative to throw on a swimsuit! Even my doctor commented on how fit I am - and I’ve accomplished it all through using her app in the driveway or my living room.

Developer Response ,

Congrats on these huge milestones! We're so glad that you're making great use of the app :)

TatieJanet ,

Content great, few bugs to work out

I am a few days into using the app and the content is really great and I am getting an awesome workout each time. I love that you can make each set as hard or easy as you want and for the majority of the sets you can go at a pace comfortable to you. Some things that would make the app better strictly technologically speaking are things like starting your workout and having an optional automatic mode that after a certain amount of elapsed time will automatically move onto the next workout (maybe a small countdown area on each set). I find it just a little inconvenient to have to go over to the app every time and click to move onto the next workout. I’ve had some issues moving out of the app to change a song and the workout restarting on me, not a big deal to me because I can easily click through to get back to where I was but might be for others. I’ve also had trouble within the profile settings - being able to add in information and save it or go back to the setting page from there. The back arrow and check mark to save what I’ve input has a bug and is super high up so you can’t actually click either button. Excited for more content to be added and would love a section dedicated to legs, we are all striving for those Carrie Underwood / Kacey Musgraves gams.

Developer Response ,

Hi! Love that you are getting your sweat on with a level a vigour that suits you each day :) Did you know you can see LEGS workouts by clicking on the exercise library tab? Give it a try! If you have any other issues with your music or have questions, please email the team at and they'd be happy to help!

FBMa4 ,

Day 30 and loving it!

I enjoy working out but have always been extremely self conscious about training in a group setting and this app allows me to workout from the comfort of my own home with minimal equipment. Love that Erin takes you through each step of your workout with highly motivating and fun commentary, talking you through proper form and most of all providing you with the positive words that encourage you to never quit! Love that during my workout I never have to remember what is coming next and it methodically takes you through your circuits or tabatas. The community aspect and posting allows for a positive and supportive environment. Only suggestion is I wish that the community factor allowed notifications to you when someone respond to comments or likes them to create more communication between the community. To my knowledge app is unable to notify me if another participant is commenting on a post. I’d also love to see some incorporation of workouts to some of Erin’s workout play lists. Erin makes working out a game with fantastic are having so much fun you forget how many pushups or squats you’ve actually done! Thank you Erin for sharing your positive enthusiasm for being healthy and for an awesome app that continues to get better every time I use it!

Developer Response ,

Hey there! Thanks so much for taking the time to write this detailed review (& provide us with some user feedback). We're thrilled to know that you're loving the workouts! Keep up all of your hard work and dedication :)

App Privacy

The developer, Plankk Technologies 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 Linked to You

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

  • Health & Fitness
  • Identifiers
  • Usage Data

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Diagnostics

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

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