Great Open Source iPhone Apps

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

Alternative Software
Alternative SoftwareList by Alternative Software, last updated 2025-05-27
  1. Books, Media, and Entertainment

  2. Openreads icon
     Like

    Keep track of the books you've read and want to read.

    License model

    • FreeOpen Source

    Platforms

    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    Openreads screenshot 1
    Openreads screenshot 2
    Openreads screenshot 3
  3. OpenLeaf icon
     Like

    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.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPhone
    • iPad
    OpenLeaf screenshot 1
    OpenLeaf screenshot 2
    OpenLeaf screenshot 3
  4. One of the only open source RSS readers for iPhone. It has a great interface and is easy to use.

    License model

    • FreeOpen Source

    Application types

    Platforms

    • Mac
    • iPhone
    • iPad
    NetNewsWire screenshot 1
    NetNewsWire screenshot 1
    NetNewsWire screenshot 2
    +7
    NetNewsWire screenshot 3
  5. The best way to keep track of and watch YouTube videos on iPhone.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • Mac
    • iPhone
    • iPad
    • Apple Watch
    Unwatched for YouTube screenshot 1
    Unwatched for YouTube screenshot 1
    Unwatched for YouTube screenshot 2
    +1
    Unwatched for YouTube screenshot 3
  6. Allows you to play many different, uncommon media formats.

    License model

    • FreeOpen 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
    VLC Media Player screenshot 1
    VLC Media Player screenshot 1
    VLC Media Player screenshot 2
    +4
    VLC Media Player screenshot 3
  7. Emulate a variety of Nintendo games on iPhone.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPhone
    • AltStore
    • iPad
    Delta Emulator screenshot 1
    Delta Emulator screenshot 1
    Delta Emulator screenshot 2
    +1
    Delta Emulator screenshot 3
  8. RetroArch icon
     Like

    Emulate games from many different consoles on iPhone.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Blackberry
    • iPad
    • F-Droid
    • Steam
    • Raspberry Pi
    • Playstation
    • Xbox
    Main view
    Online updater
    Screen keyboard
    +6
    Playlist
  9. Productivity

  10. LocalSend icon
     Like

    An amazing, cross-platform app that acts similarly to Airdrop. Once two devices are on the same network, they can share files.

    License model

    • FreeOpen Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • AppImageHub
    • Snapcraft
    • Flathub
    • F-Droid
    • Chocolatey
    LocalSend screenshot 1
    LocalSend screenshot 1
    LocalSend screenshot 2
    +5
    LocalSend screenshot 3
  11. A basic app to block out hours during the day to be more productive.

    License model

    • FreeOpen Source

    Platforms

    • iPhone
    • iPad
    • Mac
    Hour Blocks screenshot 1
    Hour Blocks screenshot 2
    Hour Blocks screenshot 3
  12. An open-source, end-to-end encrypted, cross-platform alternative to Google Photos.

    License model

    • FreemiumOpen Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Flathub
    • F-Droid
    • Flatpak
    Ente Photos screenshot 1
    Ente Photos screenshot 2
    Ente Photos screenshot 3
  13. AdGuard icon
     Like

    Block ads in Safari and across iOS.

    License model

    • FreemiumOpen 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
    AdGuard screenshot 1
    Very good app for blocking ads. Use it!
    AdGuard screenshot 2
    +4
    AdGuard screenshot 3
  14. Signal icon
     Like

    One of the best and most popular cross-platform end-to-end encrypted messaging apps.

    License model

    • FreeOpen Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • iPad
    • Flathub
    • Ubuntu
    • Debian
    Signal screenshot 1
    Signal screenshot 1
    Signal screenshot 2
    +4
    Signal screenshot 3
  15. Notesnook icon
     Like

    An excellent app for end-to-end encrypted notes that is cross-platform

    License model

    • FreemiumOpen Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Google Chrome
    • Flathub
    • F-Droid
    • Software as a Service (SaaS)
    • Flatpak
    Notesnook screenshot 1
    Notesnook screenshot 1
    Notesnook screenshot 2
    +6
    Notesnook screenshot 3
  16. A dictionary app.

    License model

    • FreeOpen Source

    Platforms

    • iPhone
    • iPad
    • Android
    WordDefiner screenshot 1
    WordDefiner screenshot 1
    WordDefiner screenshot 2
    +9
    WordDefiner screenshot 3
  17. A great app to scan documents that doesn't contain ads or donation requests.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPhone
    Open Scanner screenshot 1
    Open Scanner screenshot 2
    Open Scanner screenshot 3
  18. Open source URL shortener for iPhone.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPhone
    • iPad
    • Android
    ShortenMyURL screenshot 1
    ShortenMyURL screenshot 1
    ShortenMyURL screenshot 2
    +4
    ShortenMyURL screenshot 3
  19. Habo icon
     Like

    A basic, yet effective open source habit tracker.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • Android
    • iPhone
    Habo screenshot 1
    Habo screenshot 2
    Habo screenshot 3
  20. A mobile-friendly version of the desktop office suite. It's great for editing Microsoft Office files on the go.

    License model

    • Free PersonalOpen Source

    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
    ONLYOFFICE screenshot 1
    ONLYOFFICE screenshot 1
    ONLYOFFICE screenshot 2
    +7
    ONLYOFFICE screenshot 3
  21. Nextcloud icon
     Like

    On-premises file sync, universal access, integrated collaboration, real-time communication with privacy and data control focus.

    License model

    • FreeOpen Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • F-Droid
    • Cloudron
    • Snapcraft
    • Docker Hub
    • Raspberry Pi
    Simple and powerful file sync & share
    Simple upload even for people who don’t have Nextcloud
    Great Android & iOS apps to sync your files.
    +3
    Very easy theming
  22. An alternative to Google Meet or Microsoft Teams.

    License model

    • FreeOpen Source

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Apple Watch
    • F-Droid
    Jitsi Meet screenshot 1
    Jitsi Meet screenshot 1
    Jitsi Meet screenshot 2
  23. Email aliasing service.

    License model

    • FreemiumOpen Source

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Microsoft Edge
    • Google Chrome
    • Safari
    • F-Droid
    • Mozilla Firefox
    Open source solution to protect your email address.
    Create alias quickly with SimpleLogin Chrome & Firefox extension.
    Alias management dashboard.
    +1
    Visualize all emails sent to or replied from an alias.
  24. Ente Auth icon
     Like

    An alternative to Microsoft authenticator.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Flathub
    • F-Droid
    • Flatpak
    • WebApps
    Ente Auth screenshot 1
    Ente Auth screenshot 1
    Ente Auth screenshot 2
    +7
    Ente Auth screenshot 3
  25. Brave icon
     Like

    My favorite cross-platform web browser.

    License model

    • FreeOpen Source

    Application types

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Snapcraft
    • Flathub
    • Homebrew
    • Chocolatey
    Brave screenshot 1
    Brave screenshot 1
    Brave screenshot 2
    +4
    Brave screenshot 3
  26. 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.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • iPad
    Tie Tracker screenshot 1
    Tie Tracker screenshot 2
    Tie Tracker screenshot 3
  27. Finance

  28. Cashew icon
     Like

    A great budget app for storing information on-device.

    License model

    • FreemiumOpen Source

    Platforms

    • Online
    • Android
    • iPhone
    • iPad
    Cashew screenshot 1
    Cashew screenshot 2
    Cashew screenshot 3
  29. SplitBill icon
     Like

    Scan receipts and split them amongst your group.

    License model

    • FreeOpen Source

    Platforms

    • iPhone
    • iPad
    SplitBill screenshot 1
    SplitBill screenshot 2
    SplitBill screenshot 3
  30. Spliit icon
     Like

    A cool minimalist app to share expenses.

    License model

    • FreeOpen Source

    Platforms

    • Online
    • iPhone
    Optimized reimbursements
    Expense list
    Automatic receipt scanning
  31. A simple expense tracker.

    License model

    • FreeOpen Source

    Platforms

    • iPhone
    Dime: Budget & Expense Tracker screenshot 1
    Dime: Budget & Expense Tracker screenshot 2
    Dime: Budget & Expense Tracker screenshot 3
  32. A simple expense tracker.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPad
    • iPhone
    Klug Saver screenshot 1
    Klug Saver screenshot 2
    Klug Saver screenshot 3
  33. A simple expense tracker.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPhone
    • iPad
    Squirrel - Expense Tracker screenshot 1
    Squirrel - Expense Tracker screenshot 2
    Squirrel - Expense Tracker screenshot 3
  34. Exercise and Nutrition

  35. OutRun icon
     Like

    A great app for tracking runs, cycling, walking, etc. All data is stored locally on-device.

    License model

    • FreeOpen Source

    Application types

    Platforms

    • iPhone
    OutRun screenshot 1
    OutRun screenshot 2
    OutRun screenshot 3
  36. Keep track of your push-ups with a clean interface.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPhone
    • iPad
    Minimalistic Push screenshot 1
    Minimalistic Push screenshot 2
    Minimalistic Push screenshot 3
  37. Currently available in beta for iOS. Keep track of your calorie intake.

    License model

    • FreeOpen Source

    Platforms

    • Android
    • iPhone
    • iPad
    • Android Tablet
    OpenNutriTracker screenshot 1
    OpenNutriTracker screenshot 2
    OpenNutriTracker screenshot 3
  38. This app lets you scan and view health information on a wide variety of food products.

    License model

    • FreeOpen Source

    Platforms

    • Online
    • Android
    • iPhone
    • iPad
    Open Food Facts screenshot 1
    Open Food Facts screenshot 2
    Open Food Facts screenshot 3
  39. Weather

  40. A fun weather app with some 3D elements.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPhone
    • iPad
    Sky Wizard screenshot 1
    Sky Wizard screenshot 2
    Sky Wizard screenshot 3
  41. 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...

    License model

    • FreemiumOpen Source

    Application type

    Platforms

    • iPhone
    • iPad
    SaxWeather screenshot 1
    SaxWeather screenshot 2
    SaxWeather screenshot 3
  42. 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

    • FreeOpen Source

    Application type

    Platforms

    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    OSS Weather screenshot 1
    OSS Weather screenshot 2
    OSS Weather screenshot 3
  43. A very simple weather app with iOS widgets.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPhone
    • iPad
    Minimal Weather screenshot 1
    Minimal Weather screenshot 2
    Minimal Weather screenshot 3
  44. AI Tools

  45. Best open source option for accessing AI in the cloud.

    License model

    • FreeOpen Source

    Platforms

    • Mac
    • Online
    • iPhone
    • iPad
    HuggingChat screenshot 1
    HuggingChat screenshot 1
    HuggingChat screenshot 2
  46. fullmoon icon
     Like

    Provides iPhone users with the ability to run AI models on device.

    License model

    • FreeOpen Source

    Platforms

    • Mac
    • iPhone
    • iPad
    • visionOS
    fullmoon screenshot 1
    fullmoon screenshot 1
    fullmoon screenshot 2
    +5
    fullmoon screenshot 3
  47. MLC LLM icon
     Like

    Run AI locally with a large variety of models to choose from.

    License model

    • FreeOpen Source

    Application type

    Platforms

    • iPhone
    • iPad
    • Android
    • Linux
    • Mac
    • Windows
    • Python
    • Online
    MLC LLM screenshot 1
    MLC LLM screenshot 2
    MLC LLM screenshot 3
  48. Not as good as most visual intelligence apps, but it is cool that it is open source.

    License model

    • FreeOpen Source

    Platforms

    • iPhone
    • iPad
    HuggingSnap screenshot 1
    HuggingSnap screenshot 2
    HuggingSnap screenshot 3
  49. Music Practice Tools

  50. Tuneo icon
     Like

    A great tuner for any instrument.

    License model

    • FreeOpen Source

    Platforms

    • iPad
    • iPhone
    • Android
    Tuneo screenshot 1
    Tuneo screenshot 2
    Tuneo screenshot 3
Page 1 of 2

Thanks for stopping by and checking out some great open source apps for iOS. If you have any suggestions, let me know.


This list was created by Alternative Software Mar 20, 2025 and was last updated May 27, 2025. The list has 56 apps.

You can create your own lists from our large database of apps either for your own sake or if you want to share some great apps with other people.


Comments

Darlene Sonalder
Apr 10, 2025
0

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 icon Spliit

1 reply
Alternative Software
May 14, 2025

Great suggestion! I just added it. I'm surprised I haven't seen it before. 😉

Darlene Sonalder
Apr 8, 2025
0

Great update ! I discovered multiple new interesting open source app for iOS, thank you !

Shaz Shah
Apr 1, 2025
1

Good list of cross-platform apps. I gave up on iOS a while back and I use quite a few of the listed apps.

Gu