Legal
Terms, privacy,
and attribution
Last updated: 13 June 2026
Copyright
Plinth — the application, its source code, user interface, and all associated assets — is copyright © 2026 Artem Trukhanov. All rights reserved.
The Plinth name and logo are unregistered trademarks of Artem Trukhanov. Unauthorized use of either in connection with competing products or services is prohibited.
No part of the application may be reproduced, distributed, reverse-engineered, or used to create derivative works without prior written permission, except as permitted by applicable law.
Terms of use
By downloading or using Plinth, you agree to the following terms. If you do not agree, do not install or use the app.
License
Artem Trukhanov grants you a personal, non-exclusive, non-transferable, revocable license to use Plinth on Apple devices you own or control, subject to the Apple Media Services Terms and Conditions.
Permitted use
You may use Plinth to import, organise, and play audio files you own or have the legal right to play. You are responsible for ensuring that any music you add to the app is obtained legitimately.
Prohibited use
You may not: (a) use Plinth to circumvent digital rights management or copy protection on content you do not own; (b) redistribute or resell the app or any portion thereof; (c) use the app to infringe the intellectual property rights of third parties.
Disclaimer of warranties
Plinth is provided "as is" without warranty of any kind, express or implied, including but not limited to warranties of merchantability, fitness for a particular purpose, or non-infringement. Artem Trukhanov does not warrant that the app will be error-free or uninterrupted.
Limitation of liability
To the maximum extent permitted by law, Artem Trukhanov shall not be liable for any indirect, incidental, special, consequential, or punitive damages arising out of your use or inability to use Plinth, even if advised of the possibility of such damages.
Changes to these terms
These terms may be updated from time to time. Continued use of Plinth after an update constitutes acceptance of the revised terms. The date at the top of this page reflects the most recent revision.
Privacy policy
Plinth is designed with privacy as a default, not an option. The following describes what data the app collects, where it is stored, and under what circumstances any data leaves your device.
Data stored on your device
Plinth stores the following data locally, in its own sandboxed container on your device:
- Copies of audio files you import
- Track metadata extracted from those files (artist, album, title, genre, year, artwork)
- Listening statistics: play counts, skip counts, and cumulative listening time per track, album, and artist
- AI DJ listening history used to build recommendation prompts
- Lyrics you attach to songs (sourced from LRCLIB)
- App settings and preferences
None of this data is transmitted to Artem Trukhanov or any analytics service. There is no remote database, no user account, and no telemetry.
AI DJ and external providers
The AI DJ feature may transmit data to a third-party service depending on your chosen provider:
- Apple Intelligence: Fully on-device. No data leaves your device.
- Ollama: Runs on your own local server. No data leaves your local network.
- OpenAI-compatible APIs (e.g. Grok, OpenAI): A prompt containing only text metadata — artist names, album titles, song titles, and genre tags — is sent to the API endpoint you configure. No audio files, no listening statistics, and no personal identifiers are included in the prompt. The privacy policy of your chosen provider governs how they handle this data.
Metadata enrichment
When you request automatic metadata or artwork, Plinth queries the MusicBrainz API and the Apple iTunes Search API. These requests include the album title and artist name of the album being enriched. No account credentials, device identifiers, or listening history are sent. Both APIs are public and do not require authentication.
Lyrics search
Lyrics are sourced from LRCLIB, a public, privacy-respecting lyrics database. Queries include the track title, artist name, album title, and track duration. LRCLIB does not require authentication and does not track individual users.
iCloud
Plinth does not use iCloud to sync your library, settings, or listening data. The iCloud entitlement in the app is reserved for potential future features and is not currently active.
Children
Plinth does not knowingly collect any information from children under 13. The app contains no user accounts, no social features, and no data submission mechanisms.
Contact
Questions about this privacy policy: mail@trukhanoff.dev
Third-party libraries and services
Plinth is built on top of the following open-source libraries and public services. Each is used in accordance with its respective license.
Open-source libraries
Writing embedded audio metadata tags back to files after edits. TagLib is the underlying C++ library; spfk-metadata is the Swift wrapper.
Public APIs
Album metadata enrichment: release year, genre, track listing. Rate-limited to 1 request/second per MusicBrainz policy.
Album artwork and supplementary release metadata. Queries are unauthenticated and subject to Apple's standard API terms.
Artist profile images. Only the public image endpoint is used; no user authentication or streaming is involved.
Lyrics search and retrieval. LRCLIB is a community-maintained database that does not require authentication.
Apple frameworks
Plinth uses the following Apple system frameworks, which are part of iOS, iPadOS, and macOS and governed by Apple's platform terms: AVFoundation, SwiftData, MediaPlayer, CarPlay (CPTemplates), AppIntents, Charts, and Network.