Open-source licences
What NuraTxt is built from, and the terms each part is used under. Last updated 6 October 2026.
NuraTxt is written in Dart with Flutter, with an Android layer in Kotlin, and includes the open-source components below, each used under its own licence. The full licence texts are also inside the app at Settings → About → Open-source licences, generated from the components in the version you have installed; where this page and that screen differ, the screen describes your copy.
Framework and platform
| Component | Licence | What it does |
|---|
| Flutter and the Dart SDK (Google) | BSD 3-Clause | The user interface and the Dart runtime |
| Kotlin standard library (JetBrains) | Apache 2.0 | The Android layer: receiving messages, notifications, alarms |
| AndroidX libraries and Material Components for Android (Google) | Apache 2.0 | Android support classes and standard Android interface parts |
| kotlinx.coroutines (JetBrains) | Apache 2.0 | Background work in the Android layer |
| Google Play services authentication (Google), included by google_sign_in | Android Software Development Kit License | Signing out of the Google account the retired Google Drive export used |
| Google Play Billing Library | Android Software Development Kit License | Selling the subscription through Google Play |
| SQLite | Public domain | The database engine on your phone |
Dart and Flutter packages
| Package | Licence | What it does |
|---|
| flutter_bloc, equatable | MIT | App state management |
| get_it, injectable | MIT | Dependency injection |
| go_router (Flutter team) | BSD 3-Clause | Screen navigation and notification links |
| drift, drift_flutter, sqlite3_flutter_libs | MIT | The app’s private database and its search index |
| hive_flutter | Apache 2.0 | Settings and small local records |
| another_telephony | MIT | Sending SMS |
| flutter_foreground_task | MIT | The quiet background service that keeps the app able to receive |
| flutter_local_notifications | BSD 3-Clause | Notification channels |
| permission_handler | MIT | Asking for Android permissions |
| flutter_contacts | MIT | Reading the address book |
| device_info_plus | BSD 3-Clause | Detecting the phone maker for battery-setting guidance |
| cached_network_image | MIT | Image caching for link previews |
| workmanager | MIT | Scheduled background tasks |
| rxdart | Apache 2.0 | Search input handling |
| tabler_icons_plus, based on Tabler Icons | MIT | The icons in the app |
| path, path_provider, crypto, collection, http, intl, flutter_localizations | BSD 3-Clause | Files, hashing, collections, downloads, formatting |
| google_sign_in, googleapis, extension_google_sign_in_as_googleapis_auth (Google) | BSD 3-Clause | Signing out of the Google account the retired Google Drive export used; nothing is uploaded |
| encrypt, flutter_secure_storage | BSD 3-Clause | Encryption helpers kept from the retired Google Drive export |
Fonts
| Font | Licence | Where it is used |
|---|
| Inter (The Inter Project Authors) | SIL Open Font License 1.1 | The app and this website |
| Poppins (The Poppins Project Authors) | SIL Open Font License 1.1 | The app and this website |
| Playfair Display (The Playfair Project Authors) | SIL Open Font License 1.1 | The app |
The fonts on this website are served from this site in a reduced character set; their copyright and licence information is kept inside the font files.
On-device AI (optional; downloaded only after you agree)
| Component | Licence | What it does |
|---|
| llama.cpp and ggml (Georgi Gerganov and contributors), built into the app | MIT | Runs the AI models on your phone |
| Qwen2.5-0.5B-Instruct (Alibaba Cloud), downloaded from Hugging Face | Apache 2.0 | The language model behind the AI rewrite, suggested replies and AI search. Not part of the app; kept on your phone and deletable in Settings. |
| Qwen3-Embedding-0.6B (Alibaba Cloud), downloaded from Hugging Face | Apache 2.0 | A second model that turns text into numbers so the AI features can compare it. Downloaded with the language model and deleted with it. |
The AI models are made by third parties and may change between versions of the app. This page always lists the models a current version offers. If a model comes with its own use restrictions, they are named here and apply to your use of it (Terms, section 13).
About these terms
- The MIT and BSD licences, the Apache License 2.0 and the SIL Open Font License require their copyright and licence notices to be kept with the software; the in-app page carries them.
- NuraTxt’s own code, design and name belong to YugCore (Terms, section 5). Nothing here grants a licence to NuraTxt itself.
- If we have missed a component or stated a licence wrongly, write to privacy@yugcore.com and we will correct it.