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Open-source licences

Updated 2026-07-15

Seldeo, Inc. builds the Seldeo mobile app and www.seldeo.com on top of a wide range of open-source software. This page acknowledges the projects and licences that make Seldeo possible and is intended to satisfy the "attribution" and "notice" requirements of the licences listed below.

The Seldeo mobile app also renders an in-product Open-Source Licences screen at Settings → About Seldeo → Open-source licences that lists every dependency version bundled in the currently-installed build; this page mirrors that content for public review and for App Store Review Team examination.

Third-party frameworks

Flutter and Dart

  • Flutter and Dart SDK — © Google LLC and contributors — BSD 3-Clause Licence.

Firebase / Google Cloud client SDKs

  • firebase_core, firebase_auth, firebase_storage, cloud_firestore, cloud_functions, firebase_database, firebase_messaging, firebase_app_installations, firebase_app_check, firebase_crashlytics — © Google LLC — BSD 3-Clause Licence.

Real-time communications

  • agora_rtc_engine — © Agora.io, Inc. — MIT Licence for the Flutter binding; underlying Agora SDK is proprietary and licensed to Seldeo under a commercial agreement.

Media, camera, image, and video

  • camera — Flutter team — BSD 3-Clause.
  • image, image_picker, photo_view, flutter_image_compress — MIT / BSD 3-Clause.
  • video_player, chewie, video_compress, video_thumbnail, easy_video_editor — MIT / BSD 3-Clause.
  • ffmpeg_kit_flutter_new — © Taner Sener and contributors — LGPL v3.0 for the FFmpeg core; Flutter binding under MIT. Distribution of Seldeo including FFmpeg binaries complies with LGPL v3.0 by providing a written offer of source and by dynamically linking; see this page's "Written offer" section below.

Audio

  • audioplayers, audio_session, audio_waveforms — MIT.

Emoji / GIF / stickers

  • emoji_picker_flutter — MIT.
  • giphy_get — MIT.
  • animated_emoji — MIT.

Permissions, device, network

  • permission_handler — MIT.
  • device_info_plus, package_info_plus, network_info_plus — BSD 3-Clause.
  • geolocator (used via seldeo_location_service) — MIT.

UI toolkits and animation

  • mesh_gradient, flutter_tilt, flutter_staggered_animations, flutter_staggered_grid_view, animated_text_kit, iconify_flutter_plus, loading_animation_widget, flutter_easyloading, swipe_to, carousel_slider, google_fonts, flutter_colorpicker, uicons, cupertino_icons — MIT / BSD 3-Clause / Apache 2.0 as declared by each package.

State management, storage, and utilities

  • flutter_riverpod, provider, bloc, flutter_bloc — MIT / BSD 3-Clause.
  • hive, hive_flutter, get_storage — Apache 2.0 / MIT.
  • intl — © Dart-lang authors — BSD 3-Clause.
  • rxdart, uuid, crypto, encrypt, path, path_provider, mime, http, stack_trace, meta, vector_math — BSD 3-Clause / MIT / Apache 2.0.

Contacts, telephony, and CallKit

  • flutter_contacts — MIT.
  • country_picker — MIT.
  • flutter_callkit_incoming — MIT.

QR / crypto UI

  • qr_flutter — © Luke Freeman and contributors — BSD 3-Clause.

Corporate site (Angular)

The www.seldeo.com marketing site is built with:

  • Angular — © Google LLC — MIT.
  • Angular SSR / prerender — MIT.
  • RxJS — Apache 2.0.
  • TypeScript — © Microsoft Corporation — Apache 2.0.
  • gray-matter, marked — MIT.
  • axe-core (accessibility tests) — © Deque Systems, Inc. — Mozilla Public Licence 2.0.

Backend (Cloud Functions)

Seldeo's Cloud Functions repositories depend on:

  • Node.js — MIT.
  • firebase-admin, firebase-functions — © Google LLC — Apache 2.0.
  • Various utility libraries individually declared in each seldeo_*_cloud_functions package.json.

Fonts

  • Inter, Instrument Serif, and other web fonts served through google_fonts are licensed under the SIL Open Font Licence 1.1.

Licence texts

Full licence texts for every package listed above are:

  • Available in the Open-source licences screen inside the app, generated from the bundled LICENSE files at build time.
  • Available on request by writing to legal@seldeo.com, subject line "OSS licence text – ".
  • Available from the upstream repositories of each package.

Trademarks

The names, logos, and marks of third-party products and services (for example: "Apple", "iPhone", "Google", "Google Play", "Firebase", "Android", "Microsoft", "Azure", "Agora", "Soundstripe") are trademarks or registered trademarks of their respective owners. Their appearance on Seldeo pages, in Seldeo's documentation, or inside the app does not imply endorsement by, or affiliation with, those owners beyond the contractual relationships Seldeo has with them (documented in Privacy Policy §5.2).

Written offer for source (LGPL v3.0 components)

For at least three (3) years from the release date of any binary that incorporates an LGPL v3.0 component (currently: FFmpeg via ffmpeg_kit_flutter_new), Seldeo, Inc. will make available, on request, a machine-readable copy of the corresponding source of that component under the terms of LGPL v3.0. Requests should be addressed to:

Seldeo, Inc. Attn: Legal — OSS Source Request 1007 Red Wing Dr Durham, NC 27703 United States Email: legal@seldeo.com

Please include the specific Seldeo app version and the component version for which source is requested.

Corrections

If you believe Seldeo is using your project without appropriate attribution, or if the attribution here is incorrect, please email legal@seldeo.com. We will correct or add the entry within 15 business days.

Version

This page is regenerated whenever the dependency graph materially changes. The next scheduled review is on the release of the next major app version.

Last content refresh: 2026-07-15.