Document · 04 · Credits

Shoulders of giants.

Arc Reader is built on free and open-source software. Here is the work we lean on, the people who wrote it, and the licences that govern its use.

App version · 1.0 Last synced · 2026.04.23 Full notices · in-app → Settings → About

The list below names the primary components. A machine-generated, exhaustive list with the complete licence text for every transitive dependency ships inside the app under Settings → About → Open-source licences. This page is the human-readable cliff-notes.

Where a licence requires attribution, that attribution is reproduced in the in-app list. Where the licence requires us to offer source (LGPL, MPL), that offer is also honoured in-app — email trongthien18@gmail.com to request a copy.

Engine & runtime · 01

Flutter

Google

BSD-3-Clause

UI toolkit. Everything you see in the app is rendered through Flutter’s widget tree on top of Skia / Impeller.

Dart SDK

Google

BSD-3-Clause

Language and runtime. Compiles to native ARM on device; async model for concurrent downloads.

Skia

Google

BSD-3-Clause

2D graphics engine used by Flutter for rendering text, shapes, and images on Android.

libc++ · ICU · BoringSSL

LLVM / Unicode / Google

Apache-2.0 / ICU / OpenSSL

Foundational C/C++ libraries consumed transitively by the Flutter engine for standard library, Unicode, and TLS.

Network & backend · 02

Dio

Flutterchina

MIT

HTTP client used for chapter fetching, retries, and cancelable requests.

Supabase Flutter

Supabase

MIT

Client SDK for authentication and the cloud-sync database backing registered accounts.

HTML Parser (html)

Dart team

BSD-3-Clause

Parses source pages to extract titles, authors, and chapter lists during paste-to-import.

connectivity_plus

Flutter Community

BSD-3-Clause

Detects network state changes so downloads pause on cellular when you’ve asked them to.

Local storage & state · 03

Drift (SQLite)

Simon Binder

MIT

Type-safe SQL layer on top of SQLite. Holds your library, chapter metadata, and progress on device.

SQLite

D. Richard Hipp et al.

Public domain

The small, brilliant database that powers almost everything you touch on your phone. Ours included.

flutter_secure_storage

German Saprykin

BSD-3-Clause

Stores session tokens in iOS Keychain and Android Keystore.

Riverpod

Remi Rousselet

MIT

State-management. Keeps the reading position, downloader queue, and audio player in sync across screens.

Audio & listen mode · 04

just_audio · audio_service

Ryan Heise

MIT

Background-capable audio player and Now-Playing integration on both platforms.

flutter_tts

Dustin Tolman

BSD-3-Clause

Bridges Flutter to the on-device text-to-speech engines (AVSpeechSynthesizer on iOS, TTS on Android).

Apple AVSpeechSynthesizer · Android TextToSpeech

Apple · Google

Platform SDK

The device’s native neural voices. Fully on-device, zero network, no cost.

Commerce & diagnostics · 05

purchases_flutter (RevenueCat)

RevenueCat, Inc.

MIT

Cross-platform subscription and receipt handling. Bridges App Store / Play Billing.

Google Mobile Ads (AdMob)

Google

Google SDK EULA

Powers the optional rewarded video used to earn coins on the free plan. Shown only when you tap Watch ad.

Sentry Flutter

Sentry

MIT

Crash and error reporting. Stack traces only; payloads scrubbed of URLs and chapter text before send.

Design, typography & icons · 06

Newsreader

Production Type

SIL OFL 1.1

The serif you are reading right now. Variable, optical-size aware, built for long-form reading.

Geist

Vercel

SIL OFL 1.1

Geometric sans used for UI chrome, buttons, and captions.

JetBrains Mono

JetBrains

SIL OFL 1.1

Monospace used for small-caps meta labels, numerics, and code.

Material Symbols · SF Symbols

Google · Apple

Apache-2.0 · Apple EULA

Iconography, used consistently with each platform’s terms.

Tailwind CSS

Tailwind Labs

MIT

Utility framework powering this website — not the mobile app.

A note on completeness

A running Flutter app pulls in hundreds of transitive dependencies. We ship the canonical, complete, machine-generated list — covering every package and its licence text — inside the app itself (Settings → About → Open-source licences). The list above names the load-bearing components, which is usually what people actually want to know.

Spotted something missing or wrong? Email trongthien18@gmail.com and we’ll correct it in the next release.

Our deepest thanks to every author of the above. The app exists because you gave your work away.