Great Open Source iPhone Apps

An Android app for keeping track of books you have read and want to read.

RSS reader shows you articles from your favorite blogs and news sites, and it keeps track of what you’ve read.

Native Swift/SwiftUI YouTube client for iPhone, iPad, Apple TV & Mac — ad-free, SponsorBlock, DeArrow, Google sign-in, up to 8K. Open source.

RSS-based player for Apple devices with custom queues, channel following, YouTube Shorts hiding, unique playback speeds per channel, chapter navigation, PiP, and sync.

Delta is an iOS emulator that supports multiple game systems such as NES, SNES, N64, and DS, improving upon its predecessor, GBA4iOS.

Cross-platform, free media player supports multimedia files, DVDs, streaming, offers hardware acceleration, 4K, lossless audio, and more.

A portable, fast, and lightweight emulator frontend supporting classic and modern gaming systems with features like real-time rewinding and shader support.

Free open-source tool offers secure, end-to-end encrypted file and message sharing over local networks across major desktop and mobile operating systems.

Facilitates device communication, enabling notifications, SMS replies, file sharing, and remote control across multiple operating systems.

Apple's App of The Day in 150+ countries & TechRadar’s best iPhone apps of 2020!

Open-source, end-to-end encrypted backup and sharing for photos and videos, with multi-platform sync, original quality, privacy controls, and collaborative albums.

AdGuard is the best way to get rid of intrusive ads and online tracking, and to protect your computer from malware. Make your web surfing faster, safer and more comfortable with AdGuard!.

An encrypted messaging app focused on privacy, supporting texts, calls, photos, videos, files, and group chats, with no ads or trackers.

Fully open-source, end-to-end encrypted notes with device-based security, secure sync, offline access, powerful editor, vault, backups, and exports.

WordDefiner is a powerful and thoughtfully designed online English dictionary and thesaurus app for iOS, iPadOS, and macOS. Learn the phonetic transcription, pronunciation audio, and meanings, including synonyms and antonyms, based on part(s) speech for words that you look up...

Open Scanner is a fast and simple-to-use paper-scanning app with AI features to speed up your scanning workflow:

Shortening URLs helps to manage them for both large-scale projects and everyday tasks. Shorter URLs save valuable space in your spreadsheets by fitting in smaller cells. They also look better than their full-length versions.

A privacy-first habit tracker for iPhone and iPad. A non-binary habit score instead of a fragile streak. Offline-first. Open source. No account, no subscription, no telemetry.

Habo is a free, minimalist habit tracker — no ads, no account required, protected by Face ID.

Open-source suite for editing documents, spreadsheets, presentations, forms, and PDF files with co-editing modes, plugin support, AI assistant, and integration across 40+ platforms.

Free, open-source conferencing with end-to-end encryption, group chat, screen sharing, Etherpad integration, customizable setup, and privacy by default.

Open source solution to protect your personal email address. Generous free plan with uncapped bandwidth and infinite sends/replies, self-hostable, lot of powerful features, open roadmap, you can count on SimpleLogin to guard your email inbox.

Generates, stores, and encrypts two-factor authentication tokens, enables secure backup, offers offline access, multi-device sync, and flexible import/export options.

Fast, secure browser with built-in ad block, privacy controls, and global tracking protections. Optimizes data, speed, and battery life.

Tie Tracker is a free and open source time tracking application. Its is meant to be simple and aims to allow you to track working hours across projects.

Tracks expenses, budgets, and subscriptions with offline access, privacy focus, CSV import, visual analytics, multi-currency features, and no ads.

A free and open-source personal finance tracker app built with love. Flow offers full control over you data, and works fully offline*.

An iOS App to split transactions from an image.

Spliit is a minimalist application to track and share expenses with your friends and family.

Dime is a beautiful expense tracker built with iOS design guidelines in mind.

Klug Saver is a straight forward and easy to use expense tracker.

Squirrel is a simple and private expense tracker. It works just as you would expect without overcomplicating your experience. It does not track you in any way and does not send your data anywhere.

Privacy-oriented Run/Cycling fitness tracker for iOS. 100% Free Open Source, GPL-3.0 licensed.

Track workouts effortlessly with single-tap set completion, automated rest timers, and precise failure tracking. Includes AI-generated plans and theme adaptability.

An easy to use fitness app that lets you create, schedule and track your workout.

Minimalistic Push is a new open-source push-up tracker with privacy and simplicity in mind.

OpenNutriTracker is an open-source mobile application designed to simplify nutritional tracking and management. Whether you are looking to improve your health, lose weight, or simply maintain a balanced diet, OpenNutriTracker provides a minimalistic interface to easily track and...

Open Food Facts gathers information and data on food products from around the world.

Enter the realm of Sky Wizard, where weather forecasts come to life! Experience interactive 3D magic as a wise wizard guides you through the latest weather updates with spellbinding animations and real-time insights.

A minimalistic weather app free from all the clutter and provides only the essential information. Powered by OpenWeather, Minimal Weather uses location information to display the temperature in Celsius and the weather conditions.