Supplemental Terms of Use & Privacy Policy

Offline Audio Converter — Audio Format Conversion for macOS

Last updated: July 13, 2026

1. Scope, Acceptance & Apple Standard EULA

Offline Audio Converter (the "App") is distributed through the Mac App Store and is licensed, not sold. Apple's Standard Licensed Application End User License Agreement ("Apple Standard EULA") is the primary license agreement for the App. These Supplemental Terms describe App-specific functionality, privacy practices, third-party components, and responsibilities and supplement, rather than replace, the Apple Standard EULA.

By downloading, installing, acquiring, or using the App, you accept the Apple Standard EULA and, to the extent permitted by law, these Supplemental Terms. Mandatory rights granted by applicable law and applicable open-source licence rights always prevail over any conflicting provision.

2. Developer & Controller Identity

The App is developed and provided by Sorin Nae ("Developer", "we", or "us"). For personal information voluntarily sent through support, Sorin Nae is the controller.

• Email: [email protected]
• Website: softwareevolution.ro
• Mac App Store: Offline Audio Converter product page

3. App Functionality & Compatibility

Offline Audio Converter is a macOS batch audio converter. It accepts selected MP3, WAV, AIFF, M4A, and FLAC source files and provides M4A, MP3, WAV, and AIFF output options. The App supports batches of up to 50 files, MP3 output identified as 320 kbps, built-in result playback, color themes, and an optional custom wallpaper.

Actual import and output availability depends on the App version, source encoding, and system media capabilities. Current device, operating-system, language, and regional compatibility is shown on the Mac App Store product page.

4. Licence & Permitted Professional Use

Subject to the Apple Standard EULA, these Supplemental Terms, and applicable open-source licences, you may use the App for personal and professional audio-conversion work on devices you own or control, as permitted by Apple's Usage Rules.

Except where applicable law or an applicable third-party licence expressly permits otherwise, you may not copy, modify, sublicense, sell, rent, redistribute, reverse-engineer, decompile, disassemble, bypass protection, remove proprietary notices, or attempt to derive the App's proprietary source code or components. These restrictions do not reduce rights granted under an applicable open-source licence.

5. Mac App Store Acquisition, Payments & Refunds

Apple controls Mac App Store availability, territorial distribution, price, taxes, payment processing, account association, redownloads, and refunds. The Developer does not receive your payment-card details. Any purchase or refund is subject to Apple's terms and applicable mandatory consumer law.

6. App Privacy — No Developer Backend or Tracking

The Developer operates no account system or backend server for Offline Audio Converter. The App does not upload your source audio, file names, metadata, artwork, conversion choices, or converted files to the Developer.

The App contains no advertising network, third-party analytics SDK, behavioral tracking, or Developer-operated telemetry. Audio decoding, conversion, metadata handling, artwork handling, and result playback are performed locally on your Mac.

7. Information Processed & Stored Locally

To provide its functions, the App may locally read or create source-file references, decoded audio, metadata and artwork when supported, conversion settings, working copies, temporary files, converted outputs, playback state, theme preferences, and custom-wallpaper data. Source and converted files remain in locations you select or authorize.

Temporary working data may be placed in a system temporary location and is intended to be removed when no longer needed or when the App closes. macOS may independently manage caches, temporary files, backups, or recent-item information.

8. Apple Services, App Store Analytics & Diagnostics

Apple may process acquisition, installation, update, sales, crash, and optional diagnostic information under your Apple privacy and diagnostics settings. These Apple-controlled processes are governed by Apple's Privacy Policy. Offline Audio Converter does not add its own analytics or tracking to that process.

9. Support & Website Information

If you contact us by email or through the contact form on the Software Evolution website, we receive the information you voluntarily provide, such as your name, email address, message, App version, device details, or diagnostic material you choose to attach. We use it only to answer your request, provide support, prevent abuse, comply with legal obligations, or establish and defend legal claims. The applicable legal basis may be performance of a contract or steps requested by you, our legitimate interest in providing secure support, and legal obligations.

The website contact form is processed using Formspree, and the website is delivered through Cloudflare. Those providers may process form and technical connection data under their own policies and applicable data-processing terms. Do not send passwords, payment-card details, copyrighted source audio, or unnecessary sensitive information through support channels.

Support correspondence is retained only for as long as reasonably necessary to answer the request, maintain support and security records, meet legal obligations, or resolve disputes, and is then deleted or anonymized where appropriate.

10. Your Data-Protection Rights

Because source and converted audio remain on your Mac, the Developer normally has no server-side copy to access or delete. For personal information voluntarily provided through support, applicable law may give you rights of access, correction, deletion, restriction, objection, portability, and complaint to a supervisory authority. Requests may be sent to [email protected]. Romanian users may also contact the National Supervisory Authority for Personal Data Processing.

11. Your Audio & Required Rights

You retain ownership of audio files you select and converted files you create, subject to any third-party rights in the source material. Selecting a file authorizes the App to process it locally for the conversion you request; it does not transfer ownership to the Developer.

You are responsible for having all permissions and licences required to copy, convert, reproduce, distribute, publish, or otherwise use source and converted audio. The App and its acquisition do not include rights to third-party music, recordings, broadcasts, or other protected material.

12. Conversion & Output Results

Audio conversion involves decoding and encoding. Lossy formats can introduce quality changes, and different formats may represent metadata, cover artwork, sample formats, or channel layouts differently. Preview and verify every converted file before deleting source material, sharing the result, or relying on it for a performance, archive, or delivery.

13. Working Copies, Outputs & Backups

The App is designed to work from copies and not intentionally modify or delete your selected originals. Even so, keep independent backups of irreplaceable source files and important outputs. Interrupted writes, insufficient storage, permissions, disk faults, external editors, cloud-sync tools, or selecting an unintended destination can cause failure or inconsistency.

14. Format & Metadata Compatibility

Import, conversion, metadata or artwork preservation, and playback depend on container format, codec, channel layout, sample rate, bit depth, tags, copy protection, file integrity, and system capabilities. A listed file extension does not guarantee that every encoding variant will be accepted or that every item of metadata or artwork will be preserved.

15. Batch Processing & System Conditions

Conversion speed and reliability can be affected by batch size, file duration, available storage, memory, system load, thermal conditions, operating-system behavior, and third-party storage. The current product page describes a maximum of 50 files per batch; other practical limits may result from file or system conditions. Test important output before time-critical or professional use.

16. Intellectual Property & Open-Source Components

The App, proprietary source code, interface, original documentation, and original assets are owned by or licensed to the Developer and are protected by intellectual-property law.

Offline Audio Converter uses a modified, encoder-only build of SwiftLAME and LAME 3.100 for MP3 output. The MPGLIB decoder is excluded from the build and is not distributed with the App. SwiftLAME's wrapper code is governed by the GNU Lesser General Public License v2.1 or later, and the LAME encoder library is governed by the GNU Library General Public License v2 or later.

The covered code is shipped as a replaceable dynamic framework. Complete licence texts, copyright notices, build information, and the corresponding modified source are included in the App. Users retain all rights granted by those open-source licences, including the right to inspect and modify the covered components and to replace the framework with a modified, interface-compatible version for their own use. Nothing in these Supplemental Terms restricts those rights, and this summary does not replace the complete applicable licence texts.

Apple, LAME, and all other product or brand names are trademarks of their respective owners and are used only for identification. No affiliation or endorsement is implied.

17. Warranties & Mandatory Consumer Rights

The Apple Standard EULA contains the warranty terms applicable to the App. To the maximum extent permitted by law, Offline Audio Converter is provided "as is" and "as available", and the Developer does not promise error-free or uninterrupted operation, compatibility with every file, preservation of every metadata field, or a particular audio result.

18. Limitation of Liability

Nothing in these Terms excludes liability for fraud, intentional misconduct, or any injury, damage, remedy, or responsibility that applicable law does not allow to be excluded or limited.

Subject to that rule and to the maximum extent permitted by law, the Developer is not liable for indirect or consequential loss, lost revenue, reputational loss, failure to obtain content licences, third-party storage or service failure, or avoidable loss of source or converted data where a reasonable independent backup was not maintained. This section does not replace the Apple Standard EULA or reduce any mandatory consumer remedy.

19. Updates & Availability

We may provide maintenance, security, compatibility, and feature updates. Required consumer updates will be provided as required by applicable law. Other features, batch limits, supported formats, encoders, and compatibility details may change as the App evolves, subject to applicable third-party licences. Apple controls continued Mac App Store availability.

20. Changes to These Terms

We may update these Terms to reflect new features, legal requirements, security needs, third-party licence requirements, or operational changes. The revision date will be displayed above, and material changes will be communicated by reasonable means such as the website, App Store release notes, or an in-App notice in a future version. Where law requires consent rather than notice, a change will take effect only after valid consent.

21. Suspension & Termination

Your proprietary App licence may terminate if you materially breach the Apple Standard EULA or these Supplemental Terms, subject to applicable law. Termination does not transfer ownership of your source or converted audio to the Developer and does not remove rights granted under an applicable open-source licence. Provisions concerning intellectual property, user responsibility, privacy, liability, and dispute resolution survive where their nature requires it.

22. Governing Law & Disputes

These Supplemental Terms are governed by Romanian law, without excluding applicable conflict-of-law rules. If you are a consumer, this choice does not deprive you of mandatory protections or courts available under the law of your country of habitual residence. Before formal action, please contact us so we can attempt to resolve the issue. Consumers may also contact the competent consumer-protection authority or European Consumer Centre.

23. Contact

© 2026 Sorin Nae. All rights reserved.
Offline Audio Converter is not affiliated with or endorsed by Apple Inc.