Great Open Source iPhone Apps
This is a list of some of the best open source apps for iPhone. (Yes, they do exist.)

Books, Media, and Entertainment
License model
- Free • Open Source
Platforms
- Android
- iPhone
- Android Tablet
- iPad
- F-Droid
Unleash the power of literature with OpenLeaf, your one-stop app for timeless public-domain books. Crafted meticulously using Flutter, OpenLeaf offers a seamless and smooth reading experience.
One of the only open source RSS readers for iPhone. It has a great interface and is easy to use.
+7- +1
License model
- Free • Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- BSD
- iPad
- AppImageHub
- Apple Watch
- Snapcraft
- Google Chrome
- Apple TV
- Flathub
- PortableApps.com
- F-Droid
- Kindle Fire
- Haiku
- Android TV
- Homebrew
- Chocolatey
+4- +1
License model
- Free • Open Source
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Blackberry
- iPad
- F-Droid
- Steam
- Raspberry Pi
- Playstation
- Xbox
+6Productivity
An amazing, cross-platform app that acts similarly to Airdrop. Once two devices are on the same network, they can share files.
License model
- Free • Open Source
Application type
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
- AppImageHub
- Snapcraft
- Flathub
- F-Droid
- Chocolatey
+5License model
- Free • Open Source
Platforms
- iPhone
- iPad
- Mac
License model
- Freemium • Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- Flathub
- F-Droid
- Flatpak
License model
- Freemium • Open Source
Application types
Platforms
- Mac
- Windows
- Android
- iPhone
- Chrome OS
- Android Tablet
- iPad
- Vivaldi
- Google Chrome
- Safari
- Yandex Browser
- Opera
- Mozilla Firefox
- Snapcraft
- Microsoft Edge
- Android TV
+4License model
- Free • Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- iPad
- Flathub
- Ubuntu
- Debian
+4License model
- Freemium • Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Google Chrome
- Flathub
- F-Droid
- Software as a Service (SaaS)
- Flatpak
+6License model
- Free • Open Source
Platforms
- iPhone
- iPad
- Android
+9- +4
A mobile-friendly version of the desktop office suite. It's great for editing Microsoft Office files on the go.
License model
- Free Personal • Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- HUAWEI AppGallery
- iPad
- Self-Hosted
- AppImageHub
- Snapcraft
- Flathub
- Samsung Galaxy Store
- Software as a Service (SaaS)
- Flatpak
- Cloudron
+7On-premises file sync, universal access, integrated collaboration, real-time communication with privacy and data control focus.
License model
- Free • Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- F-Droid
- Cloudron
- Snapcraft
- Docker Hub
- Raspberry Pi
+3License model
- Free • Open Source
Application types
Platforms
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- Apple Watch
- F-Droid
License model
- Freemium • Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Self-Hosted
- Microsoft Edge
- Google Chrome
- Safari
- F-Droid
- Mozilla Firefox
+1License model
- Free • Open Source
Application type
Platforms
- Mac
- Windows
- Linux
- Online
- Android
- iPhone
- Android Tablet
- iPad
- Flathub
- F-Droid
- Flatpak
- WebApps
+7License model
- Free • Open Source
Application types
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
- Snapcraft
- Flathub
- Homebrew
- Chocolatey
+4Tie 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.
Finance
License model
- Freemium • Open Source
Application types
Platforms
- Online
- Android
- iPhone
- iPad
License model
- Free • Open Source
Platforms
- iPhone
- iPad
License model
- Free • Open Source
Application types
Platforms
- Online
- iPhone
Exercise and Nutrition
License model
- Free • Open Source
Application types
Platforms
- Android
- iPhone
- iPad
- Android Tablet
This app lets you scan and view health information on a wide variety of food products.
License model
- Free • Open Source
Application types
Platforms
- Online
- Android
- iPhone
- iPad
Weather
SaxWeather is a modern iOS/macOS weather application that serves as your personal weather station companion. It offers flexible weather data integration by supporting Weather Underground for personal weather station owners, OpenWeatherMap for general location-based weather...
OSS Weather is a simple application to get clear and precise weather information from any place around the world. You get daily and minutely weather condition, plus precipitations map.
License model
- Free • Open Source
Application type
Platforms
- Android
- iPhone
- Android Tablet
- iPad
- F-Droid
AI Tools
License model
- Free • Open Source
Application types
Platforms
- Mac
- Online
- iPhone
- iPad
License model
- Free • Open Source
Application types
Platforms
- Mac
- iPhone
- iPad
- visionOS
+5License model
- Free • Open Source
Application type
Platforms
- iPhone
- iPad
- Android
- Linux
- Mac
- Windows
- Python
- Online
License model
- Free • Open Source
Platforms
- iPhone
- iPad
Music Practice Tools
License model
- Free • Open Source
Platforms
- iPad
- iPhone
- Android
Thanks for stopping by and checking out some great open source apps for iOS. If you have any suggestions, let me know.
You could add Spliit, which has an iOS app and a PWA. It's a free and open source alternative to SplitWise and Tricount
Spliit
Great suggestion! I just added it. I'm surprised I haven't seen it before. 😉