Band Bar Fit - X3 Tracker2026.13 - App Store

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.

Version History • Chart improvements: Improved chart inspection on Apple Silicon Macs [Pro]

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 2026.13 Sep 29 • Chart improvements: Inspect a bar in the chart by long tap [Pro]

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 2026.12 Sep 24 • Chart improvements: see your previous rep history by dragging the timeline in the charts [Pro]

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 2026.11 Sep 20 • Chart improvements: max, min and personal best reps indicators [Pro]
• Widget update improved when logging from multiple devices
• Layout improvements for new screen sizes

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 2026.10 Sep 16 • Watch app to track your reps [Pro]
• Widgets [Pro]
• Siri integration: Log workouts using your voice
• More band options: Ultra Light, Performance and Short Performance [Pro]
• Charts interactions: inspect and navigate your progress [Pro]

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 2026.9 Aug 9 Keyboard shortcuts for iPad and Mac.

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 2026.8 Jul 30 - Improved Pro unlock

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 2026.7 Jun 17 Improved Pro unlock 2026.6 Mar 12 Improved unlock when subscribing.

Thanks for the feedback. It helps a lot.
Drop your contact info using the feedback button in the app for direct help or comments. 2026.5 Feb 24 Improve logging of your workouts on bigger devices. 2026.4 Feb 13 Improves the stability of Pro feature unlocking. Thanks for the feedback. 2026.3 Jan 9 Improves the stability of Pro feature unlocking. Thanks for the feedback. 2026.2 Jan 9 Improves the stability of Pro feature unlocking. Thanks for the feedback. 2026.1 Jan 8 New set logging screen.
Added progress charts tab. 2025.4 10/13/2025 Added UI and icon modernizations. 2025.3 09/15/2025 Improved sync of workout history between your devices. 2025.2 09/02/2025 Design improvements.
Style improvement for progression indicators [PRO]. 2025.1 02/17/2025 Add colored repetition delta [Pro]. 2024.5 12/11/2024 Add Hypertrophy Training Program [Pro]. 2024.4 09/08/2024 Band Bar Fit goes Pro:

- workout history timeline charts [PRO]
- quick peak indicators to your latest progress [PRO]
- Workout variations [PRO]
- iPad support 2024.3 08/27/2024 Improve band colors in dark mode 2024.2 07/27/2024 2024.1 01/31/2024