Best apps like The Castle MetroFlex Gym

9+ similar apps compared and reviewed

4.3 avg rating
9 free apps
Updated September 2026

Looking for something like The Castle MetroFlex Gym? We've analyzed 9+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to The Castle MetroFlex Gym

Bar Is Loaded - Gym Calculator#2

Bar Is Loaded - Gym Calculator by Danny Li

It's leg day, not brain day.
Strong Contender
💪 Health & Fitness
4.9😊(301 ratings)
FreeIn-App Purchases
Bar Is Loaded - Gym Calculator screenshot 1
Bar Is Loaded - Gym Calculator screenshot 2
Bar Is Loaded - Gym Calculator screenshot 3
Bar Is Loaded - Gym Calculator screenshot 4
Bar Is Loaded - Gym Calculator screenshot 5
Bar Is Loaded - Gym Calculator screenshot 6

This app simplifies weightlifting calculations, instantly determining the correct plates to load onto a barbell. It offers custom settings for inventory and a reverse calculator, along with tools for meet preparation and performance scoring.

What We Love

  • 👍 Extremely user-friendly and intuitive interface
  • 🚀 Fast and accurate plate loading calculations
  • 💰 Completely free with no ads or subscriptions
  • 🧠 Eliminates mental math during workouts
  • 📊 Rich feature set including RPE, Wilks, and 1RM calculators
  • 🔄 Reverse calculation functionality for bar loading
  • 📱 Supports both kg and lb conversions seamlessly
  • 🎨 Clean and simple design
  • 👨‍💻 Responsive developer who takes feedback seriously
  • 📸 Ability to share loaded bar images on social media
  • ⚡ Lightweight and quick performance
  • 🏋️ Tailored specifically for powerlifters and weightlifters

Room to Improve

  • 🐛 Frequent crashes and infinite loading screens
  • 🐛 5kg calculation glitch in reverse section
  • 🐛 Inconsistent weight calculations with kg plates
  • ⚙️ Limited barbell weight customization options
  • ⚙️ Collar weight incorrectly set to 4kg instead of 5kg
  • ⚙️ Rounding errors with decimal plate weights
  • 📱 Compatibility issues with newer devices (iPhone 16 Pro)
  • ❌ No ladies bar weight option (35 lbs)
  • ❌ Missing 7.5kg plate option

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4
Metroflex Gym - Plano Texas
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Manage your gym membership, book classes, and stay connected with the gym. Easily message staff, view announcements, and access promotions. All your gym needs in one convenient app.

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Westfork Fitness
Westfork Fitness
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Easily book fitness classes and manage your entire gym experience from your mobile device. Make reservations, join waitlists, purchase class packages, and track your membership status. Stay informed about new products and services offered by the fitness center.

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Powerhouse Gym Texas
Powerhouse Gym Texas
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Absolute Recomp
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Absolute Recomp
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This app helps users build strength, improve health, and reduce body fat through custom workout and nutrition plans. It offers progress tracking, exercise logging, and integration with wearable devices. Users can also work 1:1 with a coach for personalized guidance.

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YMCA of Fort Worth
YMCA of Fort Worth
YMCA of Fort Worth
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This app helps you manage your YMCA experience, offering easy program registration, access to wellness content, and community connection. Track your goals, engage with your local branch, and strengthen family well-being.

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