What Four Bars

Smart music looping & practice

Free · In‑App Purchases

Stop setting loop points. Start selecting music. What Four Bars maps tempo, key, beats and song sections so you can get straight to practising. Understand. Select. Loop. Practice. ----- DESIGNED AND BUILT AROUND APPLE’S MUSIC UNDERSTANDING FRAMEWORK First, the magic happens. Before you set a single loop point, What Four Bars analyses your music on device and builds a musical map of the track. Tempo. Key. Beats. Bars. Phrases. Sections. Your music. Already mapped out. What Four Bars understands the track, so you can get on with the music. What Four Bars uses musical structure to drive intuitive navigation and selection throughout the app. Your time is valuable, so instead of scrubbing through a waveform and manually hunting for loop points, tap a section or use intelligent snapping to beats, bars, phrases and sections, then loop it and start practising. Analysis isn’t an extra feature. It is the foundation of the app. ----- ONE UNLOCK. NO SUBSCRIPTION. Unlock What Four Bars with one permanent purchase. No subscription. No ads. You do not need to pay every month to keep practising. THREE TRACKS. FULL EXPERIENCE. Try the full What Four Bars experience with up to three of your own tracks. Explore the musical map, selections, looping, practice tools, clips and export before deciding whether to unlock unlimited use. Use it on iPhone and iPad. One unlock covers both. No account required. Practise offline. All analysis happens on-device. No cloud processing required. ----- STOP SETTING LOOP POINTS. START SELECTING MUSIC. Traditional looping starts with two points on a timeline. What Four Bars starts by understanding the music between them. No hunting for boundaries. No scrubbing back and forth. No counting bars by hand. Your time is valuable. Tap. Snap. Loop. Go. Practise. Choose exactly what you want to practise. • Tap sections or snap selections to beats, bars, phrases and song sections • Drag freely when you want complete control • See musical structure across a colour-coded waveform • Zoom in for detail or fit the whole track instantly • Move through the track without losing musical context ----- PRACTISE YOUR MUSIC. NOT AN APP. Tap it. Loop it. Play it. • Slow difficult passages without changing pitch • Transpose up or down by semitones • See the new musical key as you transpose • Add a count-in • Practise with Steady or Follow metronome modes • Jump backwards or forwards by time or bars • Move straight to the next vocal entrance • Loop four stubborn bars until they stop being stubborn Less setup. More practice. ----- SAVE THE GOOD BITS Found something worth keeping? Save it as a clip. Rename it. Replay it. Export it. Come back later. Your useful practice moments stay useful. ----- BRING YOUR MUSIC. Create projects from: • DRM-free music already on your device • Audio files from the Files app, including Dropbox, OneDrive and other Files locations • Recordings made directly in What Four Bars • Audio from videos in your Photo Library ----- BUILT FOR MUSICIANS, SINGERS AND PERFORMERS Use What Four Bars to: • Rehearse lyrics one section at a time • Rehearse vocal entrances, phrasing and harmonies • Slow down riffs, solos and difficult passages • Transpose into a more comfortable key • Practise awkward transitions • Tighten timing with a metronome • Repeat the exact section you keep getting wrong • Work on those four bars until they finally behave ----- Understand. Select. Loop. Practice.

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

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

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Accessibility

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Information

Seller
Simon Pumphrey
Size
26.9 MB
Category
Music
Compatibility
Requires iOS 27.0 or later.
  • iPhone
    Requires iOS 27.0 or later.
  • iPad
    Requires iPadOS 27.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Simon Pumphrey
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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