Good Open Source Android Apps


  • Lineage OS

    Free Android Website

    A free and open-source operating system for smartphones and tablet computers, based on the Android mobile platform. It is the successor to the highly popular custom ROM CyanogenMod, from which it was forked in December 2016 when Cyanogen Inc. announced it was discontinuing development and shut down the infrastructure behind the project. Since Cyanogen Inc. retained the rights to the Cyanogen name, the project rebranded its fork as LineageOS.

    LineageOS was officially launched on December 24, 2016, with the source code available on GitHub. Since that time, LineageOS has been described as highly popular and forcibly developed; within 4 months from the initial announcement, LineageOS development builds covered more than 160 models of phone, and over a million users, having doubled its user base in the month February–March 2017.

     

    Lineage OS icon
  • Replicant

    Free Android Website

    Replicant is a distribution of Android that is 100% Free Software.

    Most of Android is licensed freely under the Apache License 2.0. The Linux core is mostly Free Software under the GPLv2. However, there are numerous components of the default software stack on the devices that are proprietary software. Most notably, nearly any component that touches the hardware directly is proprietary software. Replicant lacks location tracking (anti)features.

    On the Replicant Wiki you can find a list of open source apps that can be used to replace the proprietary Google apps (Market, Gmail, Maps, etc.). Most notably, it suggests to use F-Droid instead of Google Market.

     

    Replicant icon
  • CopperheadOS

    Free Android Website

    A hardened open-source operating system based on Android with PaX, OpenBSD malloc and much other privacy/security features.

     

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  • F-Droid

    Free Web Android Android Tablet Website

    F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform.

     

    F-Droid icon
  • Yalp Store

    Free Android Website

    Yalp Store lets you download apps from Google Play Store as apk files. It can search for updates of installed apps and lets you search for other apps. Yalp saves downloaded apks to your default download folder. Other features include browsing categories, viewing and leaving reviews, black/white-listing apps for updates, filtering apps by being free/paid and containing/not containing ads.

    To supplement the features related to Google Play, Yalp Store has ordinary package manager features: listing, running, installing and uninstalling local apps.

    If root is available, Yalp Store can update your apps in background, install and uninstall system apps.

    By default Yalp Store connects to Google services using a built-in account, so you do not have to own a Google account to use it. The only reason to use a live Google account is to access the paid apps you own.

     

    Yalp Store icon
  • KISS Launcher

    Free Android Website

    KISS is a fast launcher for your Android. Search through your apps, contacts and settings lightning fast.

     

    KISS Launcher icon
  • OpenLauncher

    Free Android Website

    This an open source Android launcher project, started from scratch. We aim to create a powerful and community driven Android launcher.

     

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  • Termux

    Free Android Android Tablet zsh Bash Website

    A terminal emulator and Unix environment bringing powerful terminal access to your Android-powered devices.

     

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  • ProtonMail

    Freemium Web Android iPhone iPad Website

    Secure email with absolutely no compromises, brought to you by MIT and CERN scientists.

    Swiss Based
    ProtonMail is incorporated in Switzerland and our servers are located in Switzerland. We are outside of US and EU jurisdiction and all user data is protected by strict Swiss privacy laws.

    Zero Access
    Because of our end-to-end encryption, your data is already encrypted by the time it reaches our servers. We have no access to your messages, and since we cannot decrypt them, we cannot share them with third parties.

    Backwards Compatible
    ProtonMail works out of any modern web browser, there is nothing to install. We are also backwards compatible with other email providers so you can continue sending and receiving emails from friends who are not using ProtonMail.

    Forever Free
    We believe privacy is a fundamental human right and should be available for everyone. That's why we offer multi-tiered pricing including a free version that anyone can use. Let's bring privacy back to the people!

    Fully Anonymous
    We do not log IP addresses or require any personal information to sign up. We accept bitcoin and cash payments for paid accounts to ensure even paid account users have complete privacy.

    Cross Platform
    ProtonMail works on all devices, including desktops, laptops, tablets, and smartphones. It's as simple as visiting our site and logging in. There are no plugins or apps to install - simply use your favorite web browser.

     

    ProtonMail icon
  • K-9 Mail

    Free Android Android Tablet Website

    K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable notifications and more.

     

    K-9 Mail icon
  • Simplenote

    Free Mac Windows Linux Web Android ... iPhone Android Tablet iPad Kindle Fire Website

    Made by the company behind Small WordPress iconWordPress , Simplenote is an easy way to keep notes, lists, ideas, and more. Your notes stay updated across all your devices. No buttons to press. It just works. Your notes are synced across your devices when you create, add to or change them.

    Registration is required but the app and service are free.

     

    Simplenote icon
  • FBReader

    Free Mac OS X Windows Linux Android iPhone ... S60 Blackberry Android Tablet BSD iPad Website

    FBReader is an e-book reader for various platforms.

    Features:

    Supported e-book formats are:
    ePub, an international e-publishing standard.
    fb2, a Russian e-books standard de facto.
    Non-DRM'd version of Mobipocket, a popular commercial e-book format (Small Mobipocket eBook Reader iconMobipocket eBook Reader).
    plain text is supported, however FBReader might not always correctly split text into paragraphs.
    some subsets of RTF and MS Word Doc.

    Direct reading from tar, zip, gzip and bzip2 archives. (Multiple books in one archive are supported.)
    Automatic library building.
    Automatic language and character encoding detection is supported.
    Automatically generated contents table.
    Embedded images support.
    Footnotes/hyperlinks support.
    Position indicator.
    Keeps the last open book and the last read positions for all opened books between runs.
    List of last opened books.
    Automatic hyphenations. Liang's algorithm is used. The same algorithm is used in TeX, and TeX hyphenation patterns are used in FBReader. Patterns for Czech, English, Esperanto, Finnish, French, German, Italian, Norwegian, Portuguese, Russian, Spanish, Swedish and Ukrainian are included in the current version.
    Text search.
    Full-screen mode.
    Screen rotation by 90, 180 and 270 degrees.

    Currently FBReader works on

    Linux desktop.
    Windows XP/Vista computer.
    MacOS X (port of Stanislav Gobunov).
    FreeBSD computer.
    Various linux-based mobile devices:
    Sharp Zaurus with Qtopia-based ROMs, pdaXrom or OpenZaurus ROM.
    Archos PMA430.
    Siemens Simpad with Opensimpad 0.9.0/Opie ROM.
    Nokia 770/N800/N810 Internet Tablets (maemo).
    PepperPad 3 handheld web computer.
    Motorola A1200 smartphone.
    Motorola E680i/A780 smartphones. (This port is available from the third-party site.)
    IRex iLiad. (This port is available from the third-party site.)

     

    FBReader icon
  • LibreOffice

    Free Mac OS X Windows Linux Android BSD Website

    LibreOffice is a free and open-source office suite that is compatible with other major office suites, and is available on all operating systems. It is an independently-developed version of the OpenOffice.org suite.

    The office suite includes:

    Small LibreOffice - Writer iconLibreOffice - Writer, a word processor with similar functionality and file support to Small Microsoft Office Word iconMicrosoft Office Word . It has extensive WYSIWYG word processing capabilities, but can also be used as a basic text editor.

    Small LibreOffice - Calc iconLibreOffice - Calc , a spreadsheet program, similar to Small Microsoft Office Excel iconMicrosoft Office Excel . It has a number of unique features, including a system which automatically defines series of graphs, based on information available to the user.

    Small LibreOffice - Impress iconLibreOffice - Impress , a presentation program resembling Small Microsoft Office Powerpoint iconMicrosoft Office Powerpoint . Presentations can be exported as SWF files, allowing them to be viewed on any computer with Adobe Flash installed.

    Small LibreOffice - Draw iconLibreOffice - Draw , a vector graphics editor and diagramming tool similar to Small Microsoft Office Visio iconMicrosoft Office Visio . It provides connectors between shapes, which are available in a range of line styles and facilitate building drawings such as flowcharts. It also includes features similar to desktop publishing software such as Small Scribus iconScribus and Small Microsoft Office Publisher iconMicrosoft Office Publisher .

    Small LibreOffice - Math iconLibreOffice - Math , an application designed for creating and editing mathematical formulae.
    Small LibreOffice - Base iconLibreOffice - Base , a database management program, similar to Small Microsoft Office Access iconMicrosoft Office Access .

     

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  • MuPDF

    Free Windows Linux Android iPhone iPad ... Xfce Website

    MuPDF is a lightweight PDF and XPS viewer.

    The renderer in MuPDF is tailored for high quality anti-aliased graphics. It renders text with metrics and spacing accurate to within fractions of a pixel for the highest fidelity in reproducing the look of a printed page on screen.

    MuPDF is also small, fast, and yet complete. It supports PDF 1.7 with transparency, encryption, hyperlinks, annotations, searching and more. It also reads OpenXPS documents.

    We don't support interactive features such as form filling, javascript and transitions. MuPDF is written modularly, so such features can be added on by integrators if they so desire.

     

    MuPDF icon
  • LibreTorrent

    Free Android Website

    LibreTorrent is a Free as in Freedom torrent client for Android 4 and later, based on libtorrent. Download and share files directly on your device.

     

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  • Orbot

    Free Android Android Tablet Website

    Orbot is an open source Small Tor iconTor Proxy App for Small Android iconAndroid Phones. If the phone is rooted, it can even transparently route all phone internet traffic through the Small Tor iconTor network. Should be installed alongside Orweb, an open source Tor web browser that will automatically use Orbot.

     

    Orbot icon
  • FreeOTP

    Free Android iPhone Android Tablet iPad Website

    Open source implementation of the two-factor authentication HOTP and TOTP schemes.

     

    FreeOTP icon
  • Silence.im

    Free Android Kindle Fire Website

    Protect your communication in transit and on your phone. Silence (formerly SMSSecure) is a full replacement for the default text messaging application: all messages are encrypted locally and messages to other Silence users are encrypted over the air.

     

    Silence.im icon
  • NewPipe

    Free Android YouTube Website

    NewPipe is a lightweight YouTube front-end for Android.

    It doesn't need the YouTube-API or any Google Play Services, as NewPipe only parses the YouTube website in order to gain the information it needs.
    Therefore this app can be used on devices without Google Services installed. Also, you don't need a YouTube account to use NewPipe, and it's FLOSS.

    Features

    Search videos
    Display general information about a video
    Watch YouTube videos
    Listen to YouTube videos (experimental)
    Select the streaming player to watch the video with
    Download videos
    Download audio only
    Open a video in Kodi
    Show Next/Related videos
    Search YouTube in a specific language
    Watch age restricted material
    Display general information about channels

     

    NewPipe icon
  • AFWall+

    Free Android Website

    AFWall+ is an improved version of Small DroidWall iconDroidWall (front-end application for the powerful iptables Linux firewall). It allows you to restrict which applications are permitted to access your data networks (2G/3G and/or Wi-Fi and while in roaming).
    Note: If DroidWall/Avast doesn't work on your device, AFWall+ also will not work.

     

    AFWall+ icon
  • Android IMSI-Catcher Detector

    Free Android Website

    Detect attacks of fake base stations such as IMSI-Catcher and StingRay on your GSM/UMTS network. Look for silent SMS used by police and intelligence services.

     

    Android IMSI-Catcher Detector icon
  • Haven

    Free Android Website

    Haven uses an Android app and on-device sensors to protect personal spaces and possessions privately.

     

    Haven icon
  • OpenKeychain

    Free Android Android Tablet K-9 Mail Website

    OpenKeychain helps you communicate more privately and securely. It uses high-quality modern encryption to ensure that your messages can be read only by the people you send them to, others can send you messages that only you can read, and these messages can be digitally signed so the people getting them are sure who sent them. OpenKeychain is based on the well established OpenPGP standard making encryption compatible across your devices and operating systems.

    Modern encryption is based on digital “keys”. OpenKeychain stores and manages your keys, and those of the people you communicate with, on your Android. It also helps you find others’ keys online, and interchange keys by touching devices. But its most frequent use is in using those keys to encrypt and decrypt messages.

     

    OpenKeychain icon
  • Open Camera

    Free Android Android Tablet Website

    Open Camera is an Open Source Camera app for Android phones and tablets. Features:

    Option to auto-stabilise so your pictures are perfectly level no matter what.
    Expose your camera's functionality: support for focus modes, scene modes, color effects, white balance, ISO, exposure compensation/lock, face detection, torch.
    Video recording (supports all available resolutions including HD).
    Handy remote controls: timer (with optional voice countdown), auto-repeat mode (with configurable delay).
    Option to take photo remotely by making a noise (e.g., voice, whistle), or by voice command "cheese".
    Configurable volume keys.
    Optimise GUI for left or right-handed users.
    Zoom via multi-touch gesture and single-touch control.
    Ability to lock orientation to portrait or landscape for photo or video.
    Choice of save folder (including support for Lollipop's Storage Access Framework).
    Disable shutter sound.
    Overlay a choice of grids (including "rule of thirds") and crop guides.
    Optional GPS location tagging (geotagging) of photos and videos; for photos this includes compass direction (GPSImgDirection, GPSImgDirectionRef).
    Apply a date and timestamp, location coordinates, and custom text to photos; store date/time and location as video subtitles (.SRT).
    Yes you can take a selfie (also known as front camera), includes support for "screen flash".
    Support for (some) external microphones.
    Widget to automatically take a photo after launching.
    Support for Android 5 Camera2 API: manual focus distance; manual ISO; manual exposure time; RAW (DNG) files.
    Support for HDR and Exposure Bracketing (Camera2 only).
    Dynamic range optimisation mode for better quality photos.
    Small file size.
    Completely free, and no ads in the app. Open Source.

     

    Open Camera icon
  • Aperture Gallery

    Free Android Website

    This app is still currently in development and is an unreleased EARLY ALPHA. This is by no means a final version, and should NOT be treated as a final version. Feature Graphic is NOT final, and is subject to changes.

     

    Aperture Gallery icon
  • AdAway

    Free Android Website

    An ad blocker that uses the hosts file. The hosts file contains a list of mappings between hostnames and IP addresses. When an app requests an ad, that request is directed to 127.0.0.1 which does nothing. There are options to run a web server to respond to blocked hostnames and to direct requests to the IP address of your choosing. You can automatically download hosts files from the app but it is possible to use your own and to add certain sites to the white- and black-lists.

     

    AdAway icon
  • AntennaPod

    Free Android Website

    A free and open source podcastmanager for Android, allowing you to subscribe to podcasts (via iTunes database & OPML), automatically download episodes using powerful mechanisms and listen to them the way you like (speed, balance adjustments, etc).

     

    AntennaPod icon
  • Slide for Reddit

    Free Android Website

    Slide for Reddit is a rock-solid material-designed unofficial browser for Reddit with an easy to use UI and tons of customization. Slide is ad-free, open source, and is packed with many unique features.

     

    Slide for Reddit icon
  • Transportr

    Free Android Website

    Transportr is the public transport companion that respects your privacy and your freedom. Transportr is a non-profit app developed by people around the world to make using public transport as easy as possible wherever you are. Currently, it works best in Europe, but also supports many places world-wide. If you live in an unsupported area, consider adding it to Transportr. It finds directions from your home, your current position or a given station to wherever you want to go. You can also save entire trips as favorites and find next trips with one click. Discover nearby stations and show upcoming departures including the delays (if there are any).

     

    Transportr icon
  • OsmAnd

    Freemium Android iPhone Blackberry Android Tablet iPad ... OpenStreetMap Kindle Fire Website

    OsmAnd is a map and navigation application with access to the free, worldwide, and high-quality Small OpenStreetMap iconOpenStreetMap data.
    Enjoy voice and optical navigator, viewing POIs (points of interest), creating and managing GPX tracks, using contour lines visualization and altitude info (through plugin), a choice between driving, cycling, pedestrian modes, OSM editing and much more.

    Navigation
    • Works online (fast) or offline (no roaming charges when you are abroad)
    • Turn-by-turn voice guidance (recorded and synthesized voices)
    • Optional lane guidance, street name display, and estimated time of arrival
    • Supports intermediate points on your itinerary
    • Automatic re-routing whenever you deviate from the route
    • Search for places by address, by type (e.g.: restaurant, hotel, gas station, museum), or by geographical coordinates

    Map Viewing
    • Display your position and orientation
    • Optionally align the picture according to compass or your direction of motion
    • Save your most important places as Favorites
    • Display POIs (point of interests) around you
    • Display specialized online tiles, satellite view (from Bing), different overlays like touring/navigation GPX tracks and additional layers with customizable transparency
    • Optionally display place names in English, local, or phonetic spelling

    OSM Data
    • High-quality information from the best collaborative projects of the world
    • OSM data available per country or region
    • Compact offline vector maps updated at least once a month

    Safety Features
    • Optional automated day/night view switching
    • Optional speed limit display, with reminder if you exceed it
    • Optional speed-dependent zooming
    • Share your location so that your friends can find you

     

    OsmAnd icon
  • Tomahawk

    Free Mac Windows Linux Android Website

    Tomahawk gives you to access to all of your favorite music in one powerful media player. Seamlessly jump from playing a song off your local machine, to one streaming from your other machines, to a recommendation from Spotify, to a pre-release on SoundCloud to your favorite indie band on Jamendo.

    Tomahawk lets you plug-in multiple content sources, connect to your friends across a range of networks and breaks down the barriers between true social music experiences by enabling data portability and sharing across music services and licensing territories.

    Features

    Multi-Source
    Stop chasing your music across different machines, services and websites. No matter where your content is, Tomahawk can find it and play it.

    Focused
    Think of it as "antiTunes". It's a music player that is optimized for one thing... to play, discover and share music.

    Social
    Connect to your other machines and friends via Jabber, Google Chat and Twitter. Browse and play their libraries, playlists and stations.

    Cross Platform
    A Mac connected to Windows machine connected to a Linux machine? Sure... no problem. Betas are now available for OS X, Windows & Linux.

    Custom Stations
    Yeah, it's like a "genius" playlist... only smarter, and continuous. Whatever you are in the mood for, we've got the knobs and dials to find it for you.

    Extensible
    Check out the Tomahawk ecosystem that already exists, pretty cool, eh? And we are just getting started. How about you join us?

    Playlist Importer
    Metadata from playlists from all over the web - and other media players - can easily be imported into Tomahawk.

    Open-Source
    Tomahawk is totally Free & Open-Source Software.

     

    Tomahawk icon
  • Signal

    Free Mac Windows Linux Android iPhone ... Android Tablet iPad Chrome Website

    TextSecure and RedPhone have been merged to create Signal!

    Using Signal, you can communicate instantly while avoiding SMS fees, create groups so that you can chat in real time with all your friends at once, and share media or attachments all with complete privacy. The server never has access to any of your communication and never stores any of your data.

    • Say Anything - Send high-quality group, text, picture, and video messages, all without SMS and MMS fees.
    • Speak Freely - Make crystal-clear phone calls to people who live across town, or across the ocean, with no long-distance charges.
    • Be Yourself - Signal uses your existing phone number and address book. There are no separate logins, usernames, passwords, or PINs to manage or lose.
    • Stay Secure - We cannot hear your conversations or see your messages, and no one else can either. No exceptions. You can even tap and hold on a contact's name to see advanced identity verification options. Everything in Signal is always end-to-end encrypted and painstakingly engineered in order to keep your communication safe.
    • Go Fast - Signal is optimized for speed without compromise. Our state-of-the-art Axolotl protocol is unmatched in its performance, strength, and reliability.
    • Remain Connected - Push notifications let you know when new messages have arrived, and they'll be waiting for you even if your battery dies or you temporarily lose service.
    • Get Organized - Unique archive functionality makes it easy to keep track of the conversations that matter to you right now.
    • Pay Nothing - Signal is supported by a team of dedicated developers, community donations, and grants. There are no advertisements, and it doesn't cost anything to use.
    • View Source - All of our code is free, open, and available on GitHub (http://github.com/WhisperSystems ).
    • Join Movements - Technology developed by Open Whisper Systems is trusted and used by millions of people around the world every day.

     

    Signal icon
  • Tachiyomi

    Free Android Website

    A free and open source manga reader for Android. It takes manga from sources like Batoto, KissManga, etc.

     

    Tachiyomi icon
  • Amaze File Manager

    Free Android Android Tablet Website

    Amaze File Manager is an intuitive, open-source file manager for Android that's both free and ad-free (no upgrade offers, no popups, no ads at all). It's based on Material Design guidelines so it sits very nicely alongside the stock Android experience from Google and being open-source, concerns about privacy and security, should they exist, can easily be addressed.

    FEATURES

    • No ads at all
    • Lightweight and super fast
    • Based on Material Design guidelines
    • Basic features like cut, copy, delete, compress, extract etc. easily accessible
    • Work on multiple tabs at same time
    • Multiple themes with cool icons
    • Navigation drawer for quick navigation
    • App Manager to open, backup, or directly uninstall any app
    • Quickly access history, access bookmarks or search for any file
    • Root explorer for advanced users

     

    Amaze File Manager icon



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