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Each bundled or linked component below remains governed by its own license; those entries satisfy the attribution and source-availability requirements those licenses place on us as a distributor. The service entries identify online providers named in our legal pages. The same catalogue is available in the app under Settings → About.
FFmpeg is bundled as a separate, independently executed program under the GPL-3.0-or-later license. Quven bundles a vanilla GPL build of FFmpeg. The complete corresponding source code is available under the same license at https://ffmpeg.org/download.html.
Bundled components
- AsyncImageLoader.Avalonia MIThttps://github.com/AvaloniaUtils/AsyncImageLoader.Avalonia
- Avalonia MIThttps://avaloniaui.net/
- CliWrap MIThttps://github.com/Tyrrrz/CliWrap
- CommunityToolkit.Mvvm MIThttps://github.com/CommunityToolkit/dotnet
- core-js MIThttps://github.com/zloirock/core-js
The television client uses it to provide JavaScript features that older televisions lack.
- Entity Framework Core MIThttps://github.com/dotnet/efcore
- F23.StringSimilarity MIThttps://github.com/feature23/StringSimilarity.NET
- FFmpeg GPL-3.0-or-laterhttps://ffmpeg.org/
- FormatJS MIThttps://github.com/formatjs/formatjs
The television client uses its language display names polyfill on televisions whose browser lacks them.
- Fraunces SIL Open Font License 1.1https://github.com/undercasetype/Fraunces
- Leptonica BSD-2-Clausehttps://github.com/DanBloomberg/leptonica
Tesseract's image library, bundled with its BSD-2-Clause notice and built from pinned sources for each supported platform.
- hls.js Apache-2.0https://github.com/video-dev/hls.js
The web and television clients play server HLS through hls.js where the browser has no native HLS support.
- Inter SIL Open Font License 1.1https://github.com/rsms/inter
- LibVLC LGPL-2.1-or-laterhttps://www.videolan.org/vlc/libvlc.html
Quven links LibVLC dynamically via LibVLCSharp.Avalonia. The bundled, unmodified LibVLC binary may be replaced by the user with a compatible version.
- LibVLCSharp.Avalonia LGPL-2.1-or-laterhttps://code.videolan.org/videolan/LibVLCSharp
- Literata SIL Open Font License 1.1https://github.com/googlefonts/literata
- mpv (libmpv) LGPL-2.1-or-laterhttps://github.com/nickayl/mpv
The native mobile apps dynamically link an LGPL-clean libmpv build from a public fork; the complete corresponding source, including patches, is available at the linked repository.
- libplacebo LGPL-2.1-or-laterhttps://github.com/nickayl/libplacebo
GPU rendering library used by the mobile players, built from a public fork; the complete corresponding source is available at the linked repository.
- Lucide ISChttps://lucide.dev
Icon set bundled in the web client.
- Makaretu.Dns.Multicast.New MIThttps://github.com/iadepre/net-dns
- Mapperly Apache-2.0https://github.com/riok/mapperly
- Material.Icons.Avalonia MIThttps://github.com/SKProCH/Material.Icons.Avalonia
- Microsoft.Extensions.Http.Resilience MIThttps://github.com/dotnet/extensions
- foliate-js MIThttps://github.com/johnfactotum/foliate-js
The book reader draws EPUB, MOBI and KF8 books with foliate-js, which carries zip.js (BSD-3-Clause) and fflate (MIT).
- OpenJPEG BSD-2-Clausehttps://www.openjpeg.org/
The book reader decodes the JPEG 2000 images of PDF documents with OpenJPEG.
- pdf.js Apache-2.0https://mozilla.github.io/pdf.js/
The book reader draws PDF documents with pdf.js.
- PDFium Apache-2.0https://pdfium.googlesource.com/pdfium/
- Polly BSD-3-Clausehttps://github.com/App-vNext/Polly
- Preact MIThttps://preactjs.com
The television client is built on Preact.
- qcms MIThttps://github.com/FirefoxGraphics/qcms
The book reader converts the ICC colour of PDF documents with qcms.
- qrcode-generator MIThttps://github.com/kazuhikoarase/qrcode-generator
The television client draws pairing and hand-off codes with it.
- Quickenshtein MIThttps://github.com/Turnerj/Quickenshtein
- React MIThttps://react.dev/
The hosted web client is built on React and React DOM.
- React Router MIThttps://reactrouter.com/
Routing for the hosted web client.
- Roboto Apache-2.0https://github.com/googlefonts/roboto-2
Bundled in the mobile clients as the fallback subtitle font for libass because platform system fonts are not always reachable.
- Sentry SDK for JavaScript MIThttps://github.com/getsentry/sentry-javascript
The web client's diagnostics client, bundled and gated on current consent.
- SignalR JavaScript client MIThttps://github.com/dotnet/aspnetcore/tree/main/src/SignalR
Live server progress on the web client rides the SignalR JavaScript client.
- Serilog Apache-2.0https://serilog.net/
- OpenAI Whisper model MIThttps://github.com/openai/whisper
The multilingual small model is installed on demand from an immutable, checksum-verified Quven component and processes audio only on the self-hosted server.
- Silero VAD model MIThttps://github.com/snakers4/silero-vad
Local speech transcription bundles version 6.2.0 of the model, taken from pinned sources, to find where speech occurs.
- SkiaSharp MIThttps://github.com/mono/SkiaSharp
- SQLite Public Domainhttps://www.sqlite.org/copyright.html
- System.Reactive MIThttps://github.com/dotnet/reactive
- TanStack Query MIThttps://tanstack.com/query
Server-state caching in the web and television clients.
- Tesseract OCR Apache-2.0https://github.com/tesseract-ocr/tesseract
Picture subtitles are read into text with Tesseract, built from pinned sources and bundled on each platform where it has been verified.
- Tesseract tessdata_fast Apache-2.0https://github.com/tesseract-ocr/tessdata_fast
Picture subtitles are read with the eng, ita, fra, deu, spa, por, swe, rus, jpn and chi_sim language files alone, taken from pinned sources.
- TMDbLib MIThttps://github.com/jellyfin/TMDbLib
- whisper.cpp MIThttps://github.com/ggml-org/whisper.cpp
Local speech transcription bundles a whisper-cli program built from pinned sources for each supported server architecture, with Vulkan and Metal accelerated variants beside the AVX2 and baseline processor versions.
Third-party online services
These services are contacted only when the related feature is configured, enabled or requested. Their availability is not guaranteed by us and each is governed by its own terms.
- Brevo Service APIhttps://www.brevo.com/
Quven uses Brevo for transactional account and support email, and for the product news an account chooses to receive, while that provider is selected in production.
- AniDB Service APIhttps://anidb.net/
Anime catalogue search and detail lookups reach AniDB only through Quven's managed proxy; the server never contacts AniDB directly.
- AniList Service APIhttps://anilist.co/
Manga lookups for the book shelves reach AniList only through Quven's managed proxy; the server downloads covers from its image server.
- Audnexus Service APIhttps://audnex.us/
Audiobook lookups by ASIN reach Audnexus only through Quven's managed proxy; the server downloads covers from Audible's image server.
- BookBrainz Service APIhttps://bookbrainz.org/
Book edition lookups reach BookBrainz only through Quven's managed proxy.
- Cloudflare Service APIhttps://www.cloudflare.com/
Quven uses Cloudflare for content delivery and protection, aggregate Web Analytics, managed TURN relay, DNS and inbound email routing.
- Configurable AI provider Service APIhttps://openai.com/
AI matching, book character descriptions and subtitle translation use Quven's managed service, answered by OpenAI or, where the server owner chooses one of them, by Anthropic or DeepSeek. A server using operator-supplied credentials for an OpenAI-compatible provider does not send its AI matching through Quven. Covers and pictures of films and series the AI draws come from OpenAI.
- Google Books Service APIhttps://books.google.com/
Book volume lookups reach Google Books only through Quven's managed proxy; the server downloads covers from its image server.
- ISBNdb Service APIhttps://isbndb.com/
Book lookups by ISBN, title and author reach ISBNdb only through Quven's managed proxy; the server downloads covers from its image server.
- JustWatch Streaming availability data via TMDbhttps://www.justwatch.com/
Streaming availability data is licensed to TMDb by JustWatch and is shown for information only.
- LRCLIB Service APIhttps://lrclib.net/
When the owner switches it on, the server asks LRCLIB, through Quven Cloud, for the lyrics a recording's files lack and sends the title, artist, album and length.
- Metron Service APIhttps://metron.cloud/
Comic issue lookups reach Metron only through Quven's managed proxy; the server downloads covers from its image server.
- MusicBrainz Service APIhttps://musicbrainz.org/
Album and artist lookups reach MusicBrainz only through Quven's managed proxy.
- OMDb Service APIhttps://www.omdbapi.com/
External rating lookups use Quven's managed service or operator-supplied OMDb credentials.
- Open Library Service APIhttps://openlibrary.org/
Book lookups by ISBN, title and author reach Open Library only through Quven's managed proxy; the server downloads covers from its image server.
- OpenSubtitles Service APIhttps://www.opensubtitles.com/
User-initiated subtitle search and acquisition use Quven's managed service or operator-supplied OpenSubtitles credentials.
- Sentry Service APIhttps://sentry.io/
Diagnostics and crash reporting use Sentry. They are on by default, disclosed at installation or in a one-time notice, and can be turned off in settings; personal data is removed on the device before any report is sent.
- Stripe Service APIhttps://stripe.com/
Stripe processes the payments for Quven plans and calculates the tax of the buyer's country.
- TMDb Service API (free, with attribution)https://www.themoviedb.org/
This product uses the TMDb API but is not endorsed or certified by TMDb.
- TVDB Service API (with attribution)https://www.thetvdb.com/
Metadata provided by TheTVDB; lookups reach it only through Quven's managed proxy, which holds the API key.
- Wikipedia and Wikidata CC BY-SA 4.0https://www.wikipedia.org/
An artist's biography is the introduction of its Wikipedia article, credited on the page; portraits are served by Wikimedia under each file's own licence. Both are reached only through Quven's managed proxy.
Quven's own source code is proprietary and provided under the End User License Agreement. See also our Terms & Conditions and Privacy Policy.