This is an incomplete list of notable applications (apps) that run on iOS which meet guidelines for free software and open-source software.

Table info: Application name, Description, License, Sourc...
Application nameDescriptionLicenseSourceNotes
Brave browser Mobile web browser MPL 2.0 git Also available for Android, Windows, macOS and Linux.
BitwardenPassword managerGPLv3gitAlso available for Windows, Linux, macOS and Android.
ChatSecureEncrypted XMPP clientGPLv3git
Collabora OnlineOffice suite compatible with Microsoft Office, enterprise ready LibreOfficeMPLv2.0gitAlso available for Android, ChromeOS, iPadOS, Windows, macOS and Linux.
DuckDuckGoDuckDuckGo search engine clientApache 2.0gitAlso available for Firefox, Chrome, Safari and Android.
ElementMatrix collaboration client for iOSApache 2.0gitAlso available for Android, Web and Linux.
Firefox FocusMobile web browserMPL 2.0gitAlso available for Android.
Firefox for iOSMobile web browserMPL 2.0git
Infomaniak DriveFile sync and share - The secure cloudGPLv3gitAlso available for Windows, Linux, macOS and Android.
JamiSoftphone and instant messengerGPLv3gitAlso available for Windows, Linux, macOS and Android.
JoplinNote taking and to-do application with synchronization capabilitiesMITgitAlso available for Android, Windows, macOS and Linux.
KickstarterApp for the website kickstarter.comApache 2.0gitAlso available for Android.
LinphoneVideo SIP/VoIP clientGPLv2gitAlso available for Android.
MAPS.MEOffline maps and navigation using OpenStreetMap dataApache 2.0gitAlso available for Android.
MuPDF PDF reader AGPL v3+ git Also available for Android and Windows and unix-like systems.
NetNewsWireRSS readerMITgitAlso available for macOS.
NextcloudFile sync and share, with encryption possibleGPLv3gitAlso available for Android, Windows, macOS and Linux.
Nextcloud TalkChat, voice and video callingGPLv3gitAlso available for Android.
OnlyOfficeOpen-source office suite compatible with Microsoft OfficeAGPL v.3gitAlso available for Android, Windows, macOS and Linux.
Open Food FactsOpen-source and open-data food scannerApache 2.0gitAlso available for Android.
Onion BrowserAn open-source, privacy-enhancing web browser for iOS, utilizing the Tor anonymity networkowngit
Organic MapsOffline maps and navigation using OpenStreetMap dataApache 2.0gitAlso available for Android and on F-Droid and AppGallery.
OsmAndOffline maps and navigation using OpenStreetMap dataMITgitAlso available for Android.
OwnCloudFile sync and share (the official ownCloud app)GPLv3gitAlso available for Android, Windows, macOS and Linux.
ProtonMailE-Mail client ProtonMailGPLv3gitAlso available for Android.
SignalEncrypted instant messaging, voice and video callingGPLv3gitAlso available for Android, Windows, MacOS and Linux.
SimplenoteEncrypted notesGPLv2gitAlso available for Android, Windows, MacOS and Linux.
SurespotEncrypted instant messagingGPLv3gitAlso available for Android.
TelegramInstant messagingGPLv2gitAlso available for Android, Windows Phone, and Firefox OS.
TutanotaEmail clientGPLv3gitAlso available for Android, Windows, MacOS and Linux.
VimA port of the UNIX based text editor to iOS, with syntax highlightingFree softwaregit
VLC for iOSA port of the free VLC media playerMPL 2.0
GPLv2+
git
The White HouseThe official White House appMITgit
wikiHowwikiHow appGPLgit
WikipediaThe official Wikipedia appMITgitAlso available for Android, webOS and Kindle.
WireEncrypted instant messaging, voice and video callingGPLv3gitAlso available for Android, Windows, MacOS and Linux.
WordPressThe official WordPress appGPLv2gitAlso available for Android.
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