Track your X3 Resistant Band workouts. Never guess your next set again.
Band Bar Fit tracks every rep on your X3 bar: what exercise is next, which band to load, and when you've earned the step up to the next color.
TRACK YOUR WORKOUT
• Log reps for all 8 core exercises: Chest Press, Deadlift, Overhead Press, Squat, Triceps Press, Bent Row, Biceps Curl, Calf Raise
• Pick up exactly where you left off. The app remembers your last session and which exercise is up next
• Know which band to use, and get the nudge when it's time to move up
• Hands-free with Siri: Say "Last set in Band Bar Fit" or "Log a set in Band Bar Fit", to journal reps without touching your phone
GO PRO
• Apple Watch app: run the whole workout from your wrist
• Widgets: next exercise and progress on your Home Screen and Lock Screen
• Progress chart: see your reps as a histogram, tap to dig into any session
• Change indicator: every exercise's recent trend at a glance
• More bands: Ultra Light, Performance and Short Performance, on top of Light, Medium, Heavy and Elite
• Custom workouts: add Pec Crossover, Split Squats and Hypertrophy to your routine
PRO SUBSCRIPTION
Band Bar Fit is free to use. Pro is available as a monthly or yearly subscription. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings.
Terms of Use: https://fabianmerkle.com/terms-of-service/
QUESTIONS OR IDEAS?
We read every message. Tap "Give Feedback" in the app. We'd love to hear from you.
Band Bar Fit is a tracking companion for the X3 bar strength training system. The X3 bar and bands are not included and must be purchased from the manufacturer. Band Bar Fit is an independent app and is not affiliated with, endorsed by, or sponsored by the makers of X3. Thanks to the team at X3 for building such a great system.
Band Bar Fit tracks every rep of your X3 bar: what exercise is next, which band to load, and when you've earned the step up to the next color.
Downloaded this for my New Year’s resolution. I love the minimalist design and charts to see my daily progress.
Great app!
Andres Guzman-Ballen
Love how easy it is to use and the several options they have for X3. Very slick 😎
bugs
wwwwgarbage
keeps locking the paid version, unusable
Developer Response
I’m very sorry the app keeps locking your Pro features. I know how frustrating it is when you can't access what you paid for.I’ve identified the issue, and update 2026.1 will significantly improve the unlock stability. If you’re still having trouble, please use the feedback button in the app so I can help you personally.Thanks for your patience while I get this fixed.
• Support iPhone Duo
Like Band Bar Fit? A review or rating makes my day!
If you have questions, feedback or ideas for Band Bar Fit, let me know using the feedback button in the app.
Fabian
Version 2026.14
The developer, Fabian Merkle, 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 Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Fabian Merkle
Size
5.8 MB
Category
Health & Fitness
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
