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BarlineSlow down music to learn it by ear

Barline Licence Terms

End user licence agreement · Last updated: 16 October 2026

The short version

You may use Barline on your own Apple devices. Importing and opening songs needs Barline Unlimited, £2.99 a month or £19.99 a year, taken by Apple and renewing until you turn it off in your App Store settings; new subscribers get the first week free, and turning it off at least 24 hours before the week ends costs nothing. If it ends, nothing is deleted: your songs wait on your phone until you subscribe again. Import only audio you have the right to use: Barline is a practice tool for your own files, not a way to obtain music. The bars and beats it finds are an analysis, not a transcription, and can be wrong; the app gives you a way to correct them. Play it at a volume that is kind to your ears.

1. This agreement

These terms form an agreement between you and Mirentha Ltd, a company incorporated in England and Wales (company number 17207914), registered office 71–75 Shelton Street, Covent Garden, London, WC2H 9JQ (“we”, “us”). They govern your use of the Barline iPhone application and any updates to it (the “App”). By downloading or using the App you accept these terms; if you do not accept them, do not use the App.

This agreement is between you and us alone, not with Apple. We alone are responsible for the App and its content; Apple is not.

2. Your licence

We grant you a personal, non-exclusive, non-transferable, revocable licence to install and use the App on any Apple-branded device that you own or control, as permitted by the Usage Rules set out in the Apple Media Services Terms and Conditions. The licence is for your own use, personal or business; it is a licence of the software rather than a sale of it, and we keep all rights we do not expressly grant.

3. The free trial, the subscription and renewal

Barline Unlimited is sold as an auto-renewable subscription: £2.99 per month or £19.99 per year, or the equivalent the App Store displays in your country and currency. Importing songs and opening them in the App needs it, with every feature: loops, speed and pitch, the count-in, the practice ramp, markers, notes and downbeat correction. There is no free version beyond the trial. The price and the term are shown to you before you confirm.

The first week is free for a new subscriber, on either plan. Apple decides who is eligible, one free trial per Apple Account, and the subscription screen offers the trial only when you are. Nothing is charged during the trial. Unless you turn off auto-renew at least 24 hours before it ends, the subscription you chose starts when the week is up, and you are charged for it. If you buy a subscription while you are in the free week, for example by changing plan, any unused part of the week is forfeited.

Apple sells the subscription and takes the payment. Your Apple Account is charged when you confirm the purchase, or when a free trial ends, and each renewal is charged within the 24 hours before the current period ends. The subscription renews automatically unless you turn off auto-renew at least 24 hours before the current period ends. You manage and cancel it in your App Store account settings, not in the App: Settings, then your name, then Subscriptions; Manage subscription in the App's settings takes you there. We cannot cancel it for you. It is not set up for Family Sharing. Refunds are requested from Apple at reportaproblem.apple.com; we cannot issue one ourselves. Nothing in these terms affects your statutory rights, including your right to a repair, replacement or refund if the App is faulty, not as described, or not fit for purpose.

Apple records the subscription against your Apple Account rather than against your phone, so on a new or reset iPhone Restore purchases in the App's settings picks it up.

A trial or subscription ending never puts anything at risk. Every song you have imported, every loop and marker, and every note stays on your device. While no trial or subscription is running, the App will not import a new song or open one you already have; subscribing again opens them as they were. Nothing is deleted or altered.

4. Your audio, and what you may import

Barline works on audio files you supply. You may only import audio you own or have the right to use in this way: recordings you made, music you have bought as files, lessons or backing tracks you were given for the purpose, and material that is otherwise free for you to use. You are responsible for that right, and for any claim that arises from a file you import. Streamed music from Apple Music, Spotify and similar services is copy-protected and cannot be imported; the App does not attempt to circumvent that protection and must not be used to try.

The App makes a private copy of each imported file in its own storage, on your device, solely so that it can play it; it does not alter your original, does not share the copy, and deletes the copy when you delete the song or the App. Slowing a song down, changing its pitch or looping a passage inside the App is playback of your own copy for your own practice. The App has no export, no sharing and no way to send audio anywhere, and it must not be used to distribute anyone else's recording.

5. Your content

Your library is yours. Loops, markers, notes and downbeat corrections remain your property, and we claim no licence over any of it; we could not use it if we wanted to, since none of it reaches us.

You are also responsible for your own backups. Everything the App holds lives on the one iPhone it was made on, and deleting the App deletes it. An iCloud or computer backup of your phone includes your maps, loops, markers and notes in the ordinary way, but not the App's copies of your audio, which are left out because you already hold the originals; that is Apple's backup, not ours. We hold no copy of anything and cannot restore a library for you.

6. The analysis, and what the App is not

The bars, beats, sections and key the App shows are produced by Apple's on-device music analysis, run once on each song when it is imported. It is an estimate. It can place the bar line on the wrong beat, miss a tempo change, mislabel a key, or divide a song into sections a musician would draw differently; unusual metres, rubato, free-time introductions and live recordings are especially likely to confuse it. The App gives you Correct the downbeat so that you can fix the most common of these yourself, and it snaps loops to the grid it has, right or wrong.

Barline is a practice aid, not a transcription, an analysis you can rely on for any other purpose, or musical instruction. It does not tell you what notes are being played, whether you are playing them correctly, or how to play. What you take from a song, and how you practise it, are yours.

7. Hearing and volume

Repeating a passage at volume through headphones for a long practice session can do lasting harm to your hearing. The App plays at the volume you set on your phone and imposes no limit of its own. Keep the volume moderate, take breaks, and stop if you notice ringing or discomfort. That is your responsibility, not something the App can judge for you.

8. What you may not do

You may not copy, redistribute, rent, lease, sell or sublicense the App; modify it or create derivative works from it; reverse engineer, decompile or disassemble it except to the extent the law expressly permits despite this restriction; remove any proprietary notices; use it to infringe anyone's copyright or to defeat copy protection; or use it in breach of any applicable law or export control. You must also comply with any applicable third-party terms of agreement when using the App.

9. Privacy

The App collects no personal data and sends nothing to us. What it stores, how it reads the file you choose, how background playback works, and its connections to Apple's App Store are set out in the Barline privacy policy, which forms part of these terms.

10. Warranties

The App is provided “as is”. To the fullest extent permitted by law we exclude all implied warranties, including those of satisfactory quality, fitness for a particular purpose and non-infringement, and we do not warrant that the App will be uninterrupted or error-free, that any bar line, beat, section or key it finds will be correct, or that it will analyse any particular file at all.

If the App fails to conform to any warranty that cannot be excluded, you may notify Apple, and Apple will refund the purchase price, if any, that you paid for it. To the maximum extent permitted by law, Apple has no other warranty obligation in respect of the App, and any other claims, losses, liabilities, damages, costs or expenses arising from a failure to conform to a warranty are our sole responsibility.

11. Liability

Nothing in these terms limits our liability for death or personal injury caused by negligence, for fraud or fraudulent misrepresentation, or for anything else that cannot lawfully be limited. Your statutory rights as a consumer are unaffected.

Subject to that, we are not liable for indirect or consequential loss, or for loss of profit, revenue or data, arising from your use of the App; and our total liability arising out of or in connection with the App is limited to the greater of the amount you paid for it and £50.

12. Support and maintenance

We are solely responsible for support of the App; Apple has no obligation to provide any maintenance or support services. Support is offered by email at support@mirentha.com and through the Barline support page.

13. Third-party notices

The App uses no third-party code. The music analysis, audio playback and Lock Screen controls are Apple's own frameworks, supplied as part of iOS. Apple Music and Spotify are trademarks of their respective owners; the App is not affiliated with, endorsed by or connected to either, and mentions them only to say that their streamed tracks cannot be imported.

14. Term and termination

This licence runs until terminated. It ends automatically if you breach these terms, and you may end it at any time by cancelling the subscription and deleting the App. Cancelling stops the next renewal; it does not refund the period you are in, and refunds are Apple's, as set out in section 3. Sections 4, 5, 6, 10, 11, 15 and 16 survive termination.

15. Third-party claims and Apple

We, not Apple, are responsible for addressing any claim by you or a third party relating to the App or your possession and use of it, including product liability claims, any claim that the App fails to conform to a legal or regulatory requirement, and claims arising under consumer protection, privacy or similar legislation. We, not Apple, are also solely responsible for investigating, defending, settling and discharging any claim that the App, or your possession and use of it, infringes a third party's intellectual property rights.

You represent that you are not located in a country subject to a US Government embargo or designated as a “terrorist supporting” country, and that you are not on any US Government list of prohibited or restricted parties.

Apple and Apple's subsidiaries are third-party beneficiaries of this agreement, and on your acceptance of it Apple has the right to enforce it against you as a third-party beneficiary.

16. Governing law

These terms are governed by the law of England and Wales, and the courts of England and Wales have exclusive jurisdiction. If you are a consumer resident elsewhere in the UK, you may also bring proceedings in your own jurisdiction. If you are a consumer resident outside the UK, nothing in this section deprives you of the protection of any mandatory law of your country of residence, or of your right to bring proceedings in the courts of that country.

17. Contact

Questions, complaints or claims about the App: Mirentha Ltd, 71–75 Shelton Street, Covent Garden, London, WC2H 9JQ, United Kingdom. support@mirentha.com, or the contact form.