Open Source iPhone Apps

Browse 1,614 Open Source iPhone Apps on AlternativeTo with popular options like iPhone and iPhone + Open Source.

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  1. Mozilla Firefox icon
     7780 likes

    Open-source browser with Gecko engine, supporting HTML add-ons and providing privacy features like Enhanced Tracking Protection and third-party cookie blocking.

    Cost / License

    • Free
    • Open Source

    Application type

    Since

    • Since 2008

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • BSD
    • HUAWEI AppGallery
    • iPad
    • AppImageHub
    • Snapcraft
    • Linux Mobile
    • Flathub
    • Samsung Galaxy Store
    • PortableApps.com
    • Haiku
    • Flatpak
    • Homebrew
    • Chocolatey
    • Gecko
    • F-Droid
    • US flagUnited States
    More protection from the start
    Firefox Desktop (Light Theme)
    Firefox Desktop (Dark Theme)
    +8
    Firefox iOS (Light Theme)
    274 alternatives
    4.2
    Very Good283 ratings
  2. VLC Media Player icon
     7955 likes

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

    Cost / License

    Application type

    Since

    • Since 2009

    Platforms

    • Mac
    • Windows
    • Linux
    • Windows Mobile
    • Android
    • iPhone
    • Android Tablet
    • BSD
    • HUAWEI AppGallery
    • iPad
    • AppImageHub
    • Apple Watch
    • Snapcraft
    • Google Chrome
    • Apple TV
    • Flathub
    • PortableApps.com
    • F-Droid
    • Kindle Fire
    • Haiku
    • Android TV
    • OpenAPK
    • Homebrew
    • Chocolatey
    • Xbox
    • Android Auto
    • FR flagFrance
    • European Union flagEU
    VLC Media Player screenshot 1
    VLC Media Player screenshot 1
    VLC Media Player screenshot 2
    +4
    VLC Media Player screenshot 3
    212 alternatives
    4.4
    Very Good204 ratings
  3. Bitwarden icon
     1519 likes

    Open-source password manager with AES-256 encryption and device sync. Store and access encrypted logins across platforms like iOS and Android.

    Cost / License

    Application type

    Since

    • Since 2016

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Apple Watch
    • Snapcraft
    • Microsoft Edge
    • Vivaldi
    • Google Chrome
    • Flathub
    • Microsoft SQL Server
    • Tor Browser
    • Safari
    • F-Droid
    • OpenAPK
    • Software as a Service (SaaS)
    • Flatpak
    • Cloudron
    • Docker
    • Opera
    • Chocolatey
    • Mono
    • Brave
    • AppImage
    • Mozilla Firefox
    • US flagUnited States
    Bitwarden screenshot 1
    Bitwarden screenshot 1
    Bitwarden screenshot 2
    +11
    Bitwarden screenshot 3
    279 alternatives
    4.7
    Excellent166 ratings
  4. LocalSend icon
     521 likes

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

    Cost / License

    Since

    • Since 2023

    Platforms

    • Windows
    • Chocolatey
    • Mac
    • Homebrew
    • iPhone
    • iPad
    • Android
    • Android Tablet
    • F-Droid
    • Obtainium
    • OpenAPK
    • Linux
    • AppImage
    • Flatpak
    • Flathub
    • Snapcraft
    • Arch Linux
    • Nix Package Manager
    • DE flagGermany
    • European Union flagEU
    LocalSend screenshot 1
    LocalSend screenshot 1
    LocalSend screenshot 2
    +5
    LocalSend screenshot 3
    175 alternatives
    4.8
    Excellent63 ratings
  5. Signal icon
     1504 likes

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

    Cost / License

    Application type

    Since

    • Since 2011

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • iPad
    • Snapcraft
    • Android Auto
    • Flathub
    • F-Droid
    • Ubuntu
    • Debian
    • OpenAPK
    • US flagUnited States
    Signal screenshot 1
    Signal screenshot 1
    Signal screenshot 2
    +6
    Signal screenshot 3
    279 alternatives
    4.5
    Excellent102 ratings
  6. Brave icon
     1341 likes

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

    Cost / License

    Application type

    Since

    • Since 2016

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Snapcraft
    • Epic Games Store
    • Flathub
    • Samsung Galaxy Store
    • F-Droid
    • Homebrew
    • Chocolatey
    • US flagUnited States
    Brave screenshot 1
    Brave screenshot 1
    Brave screenshot 2
    +4
    Brave screenshot 3
    282 alternatives
    4.0
    Very Good167 ratings
  7. Proton Mail icon
     1163 likes

    Secure Swiss-based email with end-to-end encryption and zero third-party access. Available across devices, offering a free version to promote privacy.

    Cost / License

    Application type

    Since

    • Since 2014

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • iPad
    • Snapcraft
    • Flathub
    • OpenAPK
    • Tor
    • CH flagSwitzerland
    Proton Mail screenshot 1
    Proton Mail screenshot 1
    Proton Mail screenshot 2
    +9
    Proton Mail screenshot 3
    118 alternatives
    4.0
    Very Good101 ratings
  8. CoMaps icon
     208 likes

    CoMaps is a new community-driven map app project born out of the desire to create a truly open, transparent, and community-focused navigation app.

    Cost / License

    Application type

    Since

    • Since 2025

    Platforms

    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Android Auto
    • Obtainium
    • Flathub
    • F-Droid
    • OpenAPK
    • Flatpak
    • Apple Car Play
    • Global
    CoMaps screenshot 1
    CoMaps screenshot 2
    CoMaps screenshot 3
    63 alternatives
    4.9
    Excellent21 ratings
  9. Nextcloud icon
     1273 likes

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

    Cost / License

    Application type

    Since

    • Since 2016

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • HUAWEI AppGallery
    • iPad
    • Self-Hosted
    • Snapcraft
    • Flathub
    • F-Droid
    • OpenAPK
    • Raspberry Pi
    • Cloudron
    • Docker Hub
    • DE flagGermany
    • European Union flagEU
    Nextcloud screenshot 1
    Nextcloud screenshot 1
    Simple and powerful file sync & share
    +5
    Simple upload even for people who don’t have Nextcloud
    191 alternatives
    4.6
    Excellent64 ratings
  10. Joplin icon
     959 likes

    Open source note-taking app with Markdown support, to-do integration, and synchronization with cloud services like Dropbox and OneDrive.

    Cost / License

    Application type

    Since

    • Since 2017

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • AppImageHub
    • Snapcraft
    • Google Chrome
    • Flathub
    • PortableApps.com
    • F-Droid
    • Cloudron
    • Homebrew
    • Chocolatey
    • Termux
    • Mozilla Firefox
    • FR flagFrance
    • European Union flagEU
    Joplin screenshot 1
    Joplin screenshot 1
    Joplin screenshot 2
    +7
    Joplin screenshot 3
    269 alternatives
    4.5
    Excellent99 ratings
  11. ONLYOFFICE icon
     733 likes

    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.

    Cost / License

    Application type

    Since

    • Since 2010

    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
    • LV flagLatvia
    • European Union flagEU
    OnlyOffice 9.3 Document running in Windows 11
    OnlyOffice 9.3 Spreadsheet running in Windows 11
    ONLYOFFICE screenshot 2
    +13
    ONLYOFFICE screenshot 3
    113 alternatives
    4.1
    Very Good69 ratings
  12. Element icon
     851 likes

    A secure collaboration app with end-to-end encryption and interoperability across web, desktop, and mobile. Includes chat, voice, and video calls.

    Cost / License

    Application type

    Since

    • Since 2016

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Snapcraft
    • Matrix.org
    • Flathub
    • F-Droid
    • OpenAPK
    • Cloudron
    • GB flagUnited Kingdom
    Element screenshot 1
    Element screenshot 1
    Video calls for desktop and mobile
    +3
    Collaboration widgets
    371 alternatives
    4.3
    Very Good45 ratings
  13. Mastodon icon
     644 likes

    Federated and open-source social network with no ads, 500-character limit, custom emojis, and content warnings, emphasizing privacy and personal interaction.

    Cost / License

    Application type

    Since

    • Since 2016

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • F-Droid
    • OpenAPK
    • Cloudron
    • DE flagGermany
    • European Union flagEU
    Screenshot of the Mastodon web interface
    Social networking, back in your hands
    You're in control. You decide who you see in your home feed. No surprises.
    +6
    Build an audience. Connect with diverse folks across thousands of servers.
    152 alternatives
    4.3
    Very Good72 ratings
  14. Wikipedia icon
     1703 likes

    Free content, multilingual online encyclopedia written and maintained by a community of volunteers through a model of open collaboration, using a wiki-based editing system.

    Cost / License

    • Free
    • Open Source

    Application type

    Since

    • Since 2009

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • HUAWEI AppGallery
    • iPad
    • Samsung Galaxy Store
    • F-Droid
    • Kindle Fire
    • OpenAPK
    • MediaWiki
    • visionOS
    • US flagUnited States
    Wikipedia screenshot 1
    Wikipedia screenshot 1
    Wikipedia screenshot 2
    +5
    The home page of Wikipedia.
    68 alternatives
    4.1
    Very Good47 ratings
  15. Kodi icon
     1572 likes

    Open-source media player supporting Linux to iOS, highly customizable with plug-ins, supports 4K and diverse formats, privacy-centric and ad-free.

    Cost / License

    • Free
    • Open Source

    Application type

    Since

    • Since 2009

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • BSD
    • iPad
    • Flathub
    • Flatpak
    • Raspberry Pi
    • Fire TV
    • Apple TV
    • HUAWEI AppGallery
    • Xbox
    • F-Droid
    • US flagUnited States
    Kodi screenshot 1
    Kodi screenshot 1
    Kodi screenshot 2
    +8
    Kodi screenshot 3
    110 alternatives
    3.6
  16. KDE Connect icon
     439 likes

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

    Cost / License

    Since

    • Since 2014

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • HUAWEI AppGallery
    • iPad
    • KDE Plasma
    • F-Droid
    • Sailfish OS
    • Plasma Mobile
    • Chocolatey
    • OpenAPK
    • DE flagGermany
    • European Union flagEU
    KDE Connect screenshot 1
    System Settings Module
    KDE Connect screenshot 2
    +4
    KDE Connect screenshot 3
    127 alternatives
    4.3
    Very Good37 ratings
  17. Proton VPN icon
     588 likes

    Swiss-based VPN that ensures online privacy with a high-speed network, advanced encryption, and no-logs policy, offering a free version. Supports multiple platforms and unblocks content worldwide.

    Cost / License

    Application type

    Since

    • Since 2017

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Google Chrome
    • Apple TV
    • Flathub
    • F-Droid
    • Kindle Fire
    • Android TV
    • OpenAPK
    • Flatpak
    • Fire TV
    • Mozilla Firefox
    • CH flagSwitzerland
    Proton VPN screenshot 1
    Proton VPN screenshot 1
    Proton VPN on Fedora
    +7
    Proton VPN screenshot 3
    251 alternatives
    4.4
    Very Good65 ratings
  18. Stremio icon
     2748 likes

    Media center supporting movies, series, YouTube, and smartTV casting via DLNA/Chromecast. Offers HD, subtitles, add-ons, with no registration needed. Notice of new episodes.

    Cost / License

    Application type

    Since

    • Since 2015

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • AltStore
    • Flathub
    • Tizen OS
    • Android TV
    • Flatpak
    • Meta Quest
    • BG flagBulgaria
    • European Union flagEU
    Stremio screenshot 1
    Stremio screenshot 1
    Stremio screenshot 2
    +9
    Stremio screenshot 3
    116 alternatives
    4.3
    Very Good33 ratings
  19. Free, open-source, local-first task manager and time tracker for desktop, web, Android and iOS, with Pomodoro focus and optional self-hosted sync.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Since

    • Since 2017

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • iPad
    • Self-Hosted
    • AppImageHub
    • Snapcraft
    • Flathub
    • F-Droid
    • Flatpak
    • AppImage
    • Obtainium
    • DE flagGermany
    • European Union flagEU
    Task List and Calendar Panel side by side
    The task list view
    Scheduel Page with some tasks
    +3
    Customizable boards (Kanban, Eisenhower Matrix, etc.)
    420 alternatives
    4.8
    Excellent52 ratings
  20. RustDesk icon
     328 likes

    Open source tool for secure remote access and screen sharing, supporting cross-platform use and self-hosting for complete data control.

    Cost / License

    Application type

    Since

    • Since 2021

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Flathub
    • F-Droid
    • Flatpak
    • OpenAPK
    • SG flagSingapore
    RustDesk screenshot 1
    Main window
    RustDesk screenshot 2
    +2
    File transfer window
    165 alternatives
    4.1
    Very Good34 ratings
  21. Git icon
     1158 likes

    Git is a free & open source, distributed version control system designed to handle everything from small to very large projects with speed and efficiency.

    Cost / License

    • Free
    • Open Source

    Application type

    Since

    • Since 2009

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Chrome OS
    • Android Tablet
    • BSD
    • Linux Mobile
    • Haiku
    4.7
    Excellent23 ratings
  22. WordPress icon
     1706 likes

    Open-source software for creating websites and blogs with an emphasis on accessibility, ease of use, performance, and security.

    Cost / License

    Application type

    Since

    • Since 2009

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • PHP
    • Cloudron
    • Google Chrome
    • Safari
    • US flagUnited States
    WordPress screenshot 1
    WordPress screenshot 1
    WordPress screenshot 2
    +1
    WordPress screenshot 3
    188 alternatives
    3.8
  23. Protect your accounts with Proton Authenticator, a private and secure cross-device two-factor authentication (2FA) that works offline. Created by Proton, the creators of Proton Mail, Proton VPN, Proton Drive, and Proton Pass.

    Cost / License

    Application type

    Since

    • Since 2025

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • F-Droid
    • OpenAPK
    • CH flagSwitzerland
    Proton Authenticator screenshot 1
    Proton Authenticator screenshot 1
    Proton Authenticator screenshot 2
    +3
    Proton Authenticator screenshot 3
    80 alternatives
  24. Jellyfin icon
     396 likes

    Free open-source media system alternative to proprietary options, supports Chromecast, 4K streaming, plugin extensions, with privacy focus.

    Cost / License

    Application type

    Since

    • Since 2018

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Self-Hosted
    • Flathub
    • Tizen OS
    • F-Droid
    • Android TV
    • Cloudron
    • Kodi
    • Docker
    • Fire TV
    • Roku
    • Kindle Fire
    • Chrome OS
    • Flatpak
    • AppImage
    • Apple TV
    • Xbox
    • US flagUnited States
    Jellyfin screenshot 1
    Jellyfin screenshot 1
    Jellyfin screenshot 2
    +5
    Jellyfin screenshot 3
    102 alternatives
    4.6
    Excellent27 ratings