open-source-flutter-apps

Invoice Ninja's operator-side admin portal, a single Flutter codebase shipped to Android, iOS, macOS, Windows, Linux, and web that manages the full billing lifecycle — quotes, invoices, recurring invoices, credits, purchase orders, payments, expenses, projects, and time tracking — against a self-hosted or cloud Invoice Ninja v5 server.

AirDrop-style file sharing to nearby devices over Wi-Fi and Bluetooth, no internet required.

AltStore is a sideloading app store for non-jailbroken iOS devices that re-signs installed apps with a personal Apple developer certificate and refreshes them in the background via a desktop companion to bypass Apple's 7-day signing limit.

API Dash is a Flutter-based cross-platform API client for building, sending, and inspecting HTTP, GraphQL, and SSE requests, with code generation for 20+ languages and an optional LLM assistant called DashBot that runs locally or against a cloud model.

SwiftUI, Jetpack Compose, Compose for Desktop and Compose for Web based Kotlin Multiplatform project (using CityBikes API

Simplifies comparing photos of tamper-evident seals and patterns using your eyes.

Fingrom is a Flutter-built, ad-free, multi-currency personal finance app that ships to iOS, Android, macOS, Windows, Linux, and the Web from a single Dart codebase, with P2P device sync and end-to-end encryption.

BeeCount is a Flutter-based local-first bookkeeping app for iOS, Android, and Web that offers five interchangeable sync backends (the self-hosted BeeCount Cloud, iCloud, Supabase, WebDAV, and any S3-compatible store), AI-assisted capture via a dual on-device/cloud OCR pipeline, multi-ledger accounting with per-ledger currencies, and offline-first storage on Drift over SQLite.

Bitcoin wallet for iOS & Android. Built with React Native.

Cake Wallet is an open-source, non-custodial, multi-currency crypto wallet for iOS, Android, macOS, Linux, and Windows, built with a Flutter UI over per-chain Dart plugin packages that bridge to native C/C++ wallet code (notably the monero_c wrapper around wallet2 for Monero).

MetaMask Mobile is the official Consensys-maintained mobile wallet for the Ethereum ecosystem, shipped as a React Native app with native iOS and Android modules that supports multi-chain accounts, a built-in dapp browser, and self-custodial key management.

Monekin is an offline-first, open-source Flutter personal finance manager that tracks unlimited accounts, transactions, budgets, goals, investments, and debts across 50+ currencies, storing every byte on-device in SQLite with no account, no ads, and no internet connection required.

Bring projects, wikis, and teams together with AI. AppFlowy is the AI collaborative workspace where you achieve more without losing control of your data. The leading open source Notion alternative.

Butterfly is a Flutter note-taking and drawing app whose central object is an infinite canvas — pages hold freehand ink, text, shapes, images, areas, and waypoints in a custom

Free on-device iOS/iPadOS application manager/installer, using certificates part of the Apple Developer Program.

Habo is a Flutter-based, privacy-first habit tracker for iOS and Android that keeps every habit, note, and streak on-device by default and only syncs through an end-to-end encrypted Supabase backend.

Docker/Portainer management app for iOS, iPadOS and macOS.

HorizonCalendar is Airbnb's declarative, performant iOS calendar UI framework that renders month and week views from a single content value type, scaling from simple date pickers up to fully featured calendar apps on virtually infinite date ranges.

Artsy Eigen is the official iOS and Android client for artsy.net, built as a React Native app with native Swift and Kotlin modules for browsing artworks, following artists and galleries, and participating in live timed auctions.

Flutter app for purchasing and renting games.

A ready-made app template for WooCommerce stores.

ATV-Bilibili-demo is an open-source Bilibili client demo built for Apple TV and its tvOS focus-driven interface.

AudioKit is a Swift audio synthesis, processing, and analysis framework for iOS, macOS, tvOS, and visionOS that wraps AVFoundation and a C-backed DSP engine.

EhPanda is an unofficial iOS and iPadOS client for the E-Hentai and ExHentai galleries, written entirely in SwiftUI on top of Point-Free's Composable Architecture, with a Combine/Kanna scraping layer and Core Data persistence.

One Second Diary is a minimalist Flutter video diary app that lets you capture a one-to-ten second clip each day, then stitch your recordings into a shareable compilation movie of your life.

Swift-Radio-Pro is a Swift iOS streaming-audio reference app that plays live radio from a list of stations, surfaces now-playing metadata and album art, and integrates with the lock screen and Control Center.

Berty is a peer-to-peer messenger that runs entirely over the Wesh protocol on top of libp2p, so peers connect directly via mDNS, Bluetooth Low Energy, or Tor with no central server in the loop.

Keybase Go Library, Client, Service, OS X, iOS, Android, Electron.

Mattermost Mobile is the official React Native iOS and Android client for the self-hostable Mattermost messaging platform, giving enterprise and dev teams on-device access to channels, threads, calls, and push notifications backed by the same REST and WebSocket API as the web and desktop clients.

Official Rocket.Chat mobile client — open-source team communication, channels, threads, file sharing, voice/video calls, end-to-end encrypted.

Status is a secure messaging app, Ethereum wallet, and Web3 browser built on decentralized protocols.

Thunderbird for iOS – Open Source Email App for iOS.

FeedFlow is a minimalistic RSS Reader available on Android, iOS, macOS, Windows and Linux. Built with Kotlin Multiplatform, Jetpack Compose and SwiftUI.

A clean Hacker News reader for iOS, with offline support and custom themes.