Usually it's a bar line
that landed on the wrong beat.

Every feature works on the first three songs you import, for as long as you like: loops, speed and pitch, the count-in, the practice ramp, markers, notes and downbeat correction. There is no trial to run out. Importing a fourth asks for Barline Unlimited: £2.99 a month or £19.99 a year, taken by Apple and renewing automatically until you cancel. If it lapses, every song you have added stays playable; only new imports beyond three wait for it.

No. Apple records the subscription against your Apple Account rather than the phone, so signing in to the same account carries it across; Restore purchases in the app's settings picks it up if it does not appear straight away. It is one subscription on one Apple Account and is not set up for Family Sharing. Apple handles refunds, at reportaproblem.apple.com.

In your App Store account settings rather than in the app: Settings, then your name, then Subscriptions. Manage subscription in Barline's settings takes you straight there. Cancel at least 24 hours before the current period ends or it renews. Apple takes the payment and handles refunds, at reportaproblem.apple.com; we cannot cancel or refund for you. Cancelling never deletes anything: your songs, loops, markers and notes stay on the phone.

MP3, M4A, WAV, AIFF and FLAC, from anywhere the iPhone's file picker can reach: the Files app, iCloud Drive or a cloud drive that shows up in Files. You can pick several at once; each file can be up to 400 MB and 30 minutes long. Streamed tracks from Apple Music, Spotify and similar services are copy-protected and cannot be imported. A track that exists only inside the Music app, or inside another app, is not a file the picker can see, and other apps cannot send one straight to Barline; save it as a file first. Import only audio you have the right to use.

Barline reads the title and artist tags inside the file. Where a file has none, it uses the file's name: a file called Artist - Title is split into the two, and anything else becomes the title on its own. Either way you can correct both: open the song, tap the ⋯ button and choose Title and artist, or press and hold the song in Songs.

It runs once, on import, on the phone itself, and takes a little while for a few-minute song; the Mapping row at the top of Songs stays until it is done, and Cancel stops it. After that the map is stored, so opening the song is instant and it is never analysed again.

Entirely. The analysis is Apple's on-device framework, the audio is a file on the phone, and the app has no networking code of its own. The only thing it ever connects to is the App Store, for the subscription. Aeroplane mode is fine.

Yes. Playback carries on when the screen locks or you switch apps, and the song appears on the lock screen and in Control Centre with play, pause and five-second skips back and forward, which stay inside a loop. A call or Siri pauses it and it picks up again afterwards; audio you start in another app leaves it paused. Unplugging headphones, or losing a Bluetooth connection, pauses playback rather than switching it to the speaker. Going back to Songs stops it.

Speed runs from 40% to 120% in steps of five; drag the thin bar under the speed for anything in between. Pitch is separate and runs twelve semitones either way, so the key moves and the speed does not, or the other way round. The count-in is none, one, two or four bars, and the speed a song opens at is a default, both in Settings.

Turn it on in the loop editor and the loop gets faster as you repeat it: a step of a few percent every so many repeats, until it reaches full speed, where it stays. A loop saved at 70% with a 5% step every two repeats is at 100% after twelve. The editor works the sum out for you.

Add at playhead drops a marker on the current bar; tap a marker to jump back to it, and press and hold to rename or delete it. Notes are a free text box at the foot of each song. A marker cannot carry its own note yet.

Barline keeps its own copy of each imported file in the app's private storage, so the song keeps working if you move or delete the original. The copy is the same size as the file, so a four-minute WAV takes around 40 MB and an MP3 a tenth of that. Deleting a song from the library deletes its copy. The copies are left out of iCloud and computer backups, so keep your originals; maps, loops, markers and notes are backed up as usual. Nothing is uploaded and there is no account; the privacy page has the detail.

Swipe a song to the left in the library. Press and hold a saved loop for Edit and Delete, or use Delete loop at the foot of the loop editor, which asks you to confirm. Press and hold a marker to delete it.

An iPhone running iOS 27 or later; the on-device music analysis it depends on arrived with iOS 27. Barline is iPhone-only and portrait-only. The song screen is always dark, for reading on a music stand, as are the welcome screens and Correct the downbeat; everything else follows Light and Dark Mode.

Delete the app: that removes every song copy, every map and every loop, marker and note from the phone. We hold nothing, so there is nothing to ask us for. An iCloud or computer backup of your phone is yours to manage in Settings.