6 Best Open Source Android Apps 2021

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If you are looking for the Best Open Source Android Apps 2021 to download for free, look no further.

Our expert panel of reviewers has tested dozens of apps and we have compiled a list of the 6 Best Open Source Android Apps 2021 that passed our tests.

Check out our list of the 6 Best Open Source Android Apps 2021, tried and tested by our expert reviewers.

6 Best Open Source Android Apps 2021

1. Telegram

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“Pure instant messaging — simple, fast, secure, and synced across all your devices. One of the world’s top 10 most downloaded apps with over 500 million active users.

FAST: Telegram is the fastest messaging app on the market, connecting people via a unique, distributed network of data centers around the globe.

SYNCED: You can access your messages from all your phones, tablets and computers at once. Telegram apps are standalone, so you don’t need to keep your phone connected. Start typing on one device and finish the message from another. Never lose your data again.

UNLIMITED: You can send media and files, without any limits on their type and size. Your entire chat history will require no disk space on your device, and will be securely stored in the Telegram cloud for as long as you need it.

SECURE: We made it our mission to provide the best security combined with ease of use. Everything on Telegram, including chats, groups, media, etc. is encrypted using a combination of 256-bit symmetric AES encryption, 2048-bit RSA encryption, and Diffie–Hellman secure key exchange.

100% FREE & OPEN: Telegram has a fully documented and free API for developers, open source apps and verifiable builds to prove the app you download is built from the exact same source code that is published.

POWERFUL: You can create group chats with up to 200,000 members, share large videos, documents of any type (.DOCX, .MP3, .ZIP, etc.) up to 2 GB each, and even set up bots for specific tasks. Telegram is the perfect tool for hosting online communities and coordinating teamwork.

RELIABLE: Built to deliver your messages using as little data as possible, Telegram is the most reliable messaging system ever made. It works even on the weakest mobile connections.

FUN: Telegram has powerful photo and video editing tools, animated stickers and emoji, fully customizable themes to change the appearance of your app, and an open sticker/GIF platform to cater to all your expressive needs.

SIMPLE: While providing an unprecedented array of features, we take great care to keep the interface clean. Telegram is so simple you already know how to use it.

PRIVATE: We take your privacy seriously and will never give any third parties access to your data. You can delete any message you ever sent or received for both sides, at any time and without a trace. Telegram will never use your data to show you ads.

For those interested in maximum privacy, Telegram offers Secret Chats. Secret Chat messages can be programmed to self-destruct automatically from both participating devices. This way you can send all types of disappearing content — messages, photos, videos, and even files. Secret Chats use End-to-End Encryption to ensure that a message can only be read by its intended recipient.

We keep expanding the boundaries of what you can do with a messaging app. Don’t wait years for older messengers to catch up with Telegram — join the revolution today.”

2. Amaze File Manager

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“Overview:
* Open Source, light and smooth
* Based on Material Design guidelines
* Basic features like cut, copy, delete, compress, extract etc. easily accessible
* Work on multiple tabs at same time, support drag / drop gestures
* Multiple themes with cool icons
* Navigation drawer for quick navigation
* App Manager to open, backup, or directly uninstall any app
* FTP / FTPS Server support
* SMB, SFTP Client support
* Quickly access history, access bookmarks or search for any file
* Root explorer for advanced users
* AES Encryption and Decryption of files for security (Jellybean v4.3+)
* Cloud services support (Jellybean v4.3+ / requires additional plug-in)*
* Inbuilt Database Reader, Zip/Rar Reader, Apk Reader, Text Reader
* No ads
lots more…

You can support us by purchasing our cloud plugin through Play Store (Amaze Cloud) or through in-app donations (Amaze Settings > About menu).

This is the full version of app, you do not unlock anything on donations within the application.

Join Telegram to discuss and help in the improvement of app, take part in development
https://t.me/AmazeFileManager

Source Code
https://github.com/TeamAmaze/AmazeFileManager

XDA thread
https://forum.xda-developers.com/android/apps-games/app-amaze-file-managermaterial-theme-t2937314

Team Amaze :
Arpit Khurana
Vishal Nehra
Emmanuel
Raymond Lai”

3. DuckDuckGo Privacy Browser

Download the App on the Google Store by clicking this Button
“Tired of being tracked online? We can help. At DuckDuckGo, we believe online privacy should be simple.

With one download you get a new everyday browser that offers seamless protections from third-party trackers while you search and browse, and even access to tracking protections when receiving email. With DuckDuckGo, privacy can be your default.

Search Privately — DuckDuckGo Private Search comes built-in so you can search the web without being tracked.

Escape Website Tracking — Tracker Radar automatically blocks hidden third-party trackers we can find lurking on websites you visit in DuckDuckGo, which stops the companies behind those trackers from collecting and selling your data.

Enforce Encryption — Smarter Encryption forces sites you visit in DuckDuckGo to use an encrypted (HTTPS) connection where available, protecting your data from prying eyes.

Block Email Trackers (Beta) — 70% of emails track you as soon as you open them. Enabling Email Protection is the easy way to block email trackers and hide your address without switching services. Join the private waitlist for the free beta version through the app settings menu.

The DuckDuckGo app has the browsing features you expect, like tabs and bookmarks, plus privacy controls you’ll love. Taking control of your privacy doesn’t have to mean making tradeoffs.

Tap Fire Button, Burn Data — Clear your tabs and browsing data with one tap of the Fire Button.

Signal Your Privacy Preference with GPC — Built into the app, Global Privacy Control (GPC) intends to help you express your legal opt-out rights automatically. This will tell websites not to sell or share your personal information under future legal frameworks (e.g., CCPA, GDPR) in various states or countries.

You don’t need to wait to take back your privacy. Join the millions of people using DuckDuckGo and protect many of your everyday online activities with one app. It’s privacy, simplified. 


About Us: https://duckduckgo.com/about
How It Works: https://duckduckgo.com/app
Privacy Newsletter: https://duckduckgo.com/newsletter
Privacy Policy: https://duckduckgo.com/privacy
Open Source: https://github.com/duckduckgo/Android”

4. SoundSpice Music Player

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“SoundSpice is a light-weight and minimalist music player built while keeping aesthetics and user experience in mind. It uses Android’s latest & powerful audio engine to bring high quality sound to your ears.

FEATURES

1.100% free to use, no ads
2. Dark Mode
3. Realtime & automatic lyrics lookup
4. Skip certain folders from scan
5. Create playlists and add your favourite music
6. Share, rename, or delete music files
7. Morph navigation structure according to your needs

SoundSpice is open-source under an MIT license. You can check out the source code at https://github.com/farshed/SoundSpice-mobile

To report problems or request features, open an issue at https://github.com/farshed/SoundSpice-mobile/issues or 👍 an existing one. You can also shoot me an email at faisalarshed28@gmail.com.

UPCOMING FEATURES

– Built-in metadata editor
– Automatic album art downloader
– Sync data across devices
– Ability to experiment with music using sound equalizer
– Online radio stations”

5. Firefox Fast & Private Browser

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“Go bold with more control of your internet experience than ever before. Now you can see your open tabs, recent searches and favorite sites all in one place. The new Firefox home screen adapts to you. The more you use it, the smarter it gets. Firefox makes it easier for you to pick up right where you left off.

When it comes to your life online, you have a choice: accept the factory settings or put your privacy first. When you choose Firefox as your default browser, you’re choosing to protect your data while supporting an independent tech company. Firefox is also the only major browser backed by a non-profit fighting to give you more openness, transparency and control of your life online. Join hundreds of millions of people who choose to protect what’s important by choosing Firefox.

TL;DR
– Feel more in control of your internet experience. The new home screen lets you pick up right where you left off every time
– Even more industry-leading privacy and security from the most trusted name in tech

PERSONALIZED HOME SCREEN
Pick up right where you left off. Now you can see all your open tabs intuitively grouped and displayed along with your recent searches, bookmarks and favorite sites. You’ll also see popular articles recommended by Pocket, updated daily.

MOVE THE SEARCH BAR WHERE YOU WANT IT
Firefox lets you choose the default placement of the search bar, either at the top or the bottom of your screen. Sometimes it’s easier to search for things if you put the search bar at the bottom — especially if you’re using one hand.

FAST. PRIVATE. SAFE.
Keep what’s personal private without sacrificing speed. With Firefox, you can have more control to decide what to share online and when, because your life is your business. We designed Firefox with smart browsing features that let you take your privacy, password and bookmarks with you safely wherever you go.

MAKE FIREFOX YOUR OWN
Make Firefox your go-to, get-it-done, default browser. And with Firefox widgets, you can jump right to searching the web or using private-browsing mode straight from your phone’s home screen. And Firefox makes password management easy by remembering your passwords across devices.

PRIVACY CONTROL IN ALL THE RIGHT PLACES
Firefox gives you greater privacy protection while you’re on the web. By default, Firefox blocks trackers and scripts such as social media trackers, cross-site cookie trackers, cryptominers and fingerprinters. You can also easily choose to search in private browsing mode. And when you close private browsing mode, your browsing history and any cookies are automatically erased from your device.

FIND IT FAST WITH FIREFOX’S SEARCH BAR
Get search suggestions in the search bar and quickly access the sites you visit most. Type in your search question and get suggested and previously searched results across your favorite search engines.

COLLECTIONS
Open as many tabs as you like and organize them into Collections to stay on task. Collections can also be shared across devices so you get more done no matter where you are or what device you’re using.

GET ADD-ONS
Full support for the most popular add-ons, including ways to turbo-charge powerful default privacy settings and customize your experience.

SHARE ANYTHING IN A FEW TAPS
The Firefox web browser makes it easy to share links to web pages or specific items on a page with easy, quick access to your most recently used apps.

LEARN MORE ABOUT FIREFOX WEB BROWSER:
– Read about Firefox permissions: http://mzl.la/Permissions
– Learn more about what’s up at Mozilla: https://blog.mozilla.org

ABOUT MOZILLA
Mozilla exists to build the Internet as a public resource accessible to all because we believe open and free is better than closed and controlled. We build products like Firefox to promote choice and transparency and give people more control over their lives online. Learn more at https://www.mozilla.org.”

6. [Discontinued] Navigation Gestures–Swipe Controls

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“THIS APP IS NOT COMPATIBLE WITH ANDROID 11 AND LATER!
NAVIGATION GESTURES WILL NOT BE RECEIVING ANY MORE UPDATES!

Jealous of the cool new gesture navigation features on newer phones?
With Navigation Gestures, you don’t have to buy a new phone or wait for the next Android update to get swipe gesture controls. Navigation Gestures brings swipe gestures to any Android device! Replace the navigation bar buttons and get gesture controls with Navigation Gestures!

Best of all, Navigation Gestures can completely hide the stock navigation bar
without root! This is the first gesture control app with this feature.

Swipe left, right, up, or down. Swipe up and hold. Tap. Double tap. Long press. Go crazy and split the pill in 3! There’s a lot of ways you can use the gesture bar to control your phone. Don’t like how the gesture pill looks? Customize it!

Here’s everything you can do:

Gestures

Taps

– Single tap
– Double tap
– Tap and hold (long press)
Swipes

– Swipe up and hold
– Swipe left
– Swipe left and hold
– Swipe right
– Swipe right and hold
– Swipe up
– Swipe down
Split Pill

– Swipe up from left
– Swipe up and hold from left
– Swipe up from center
– Swipe up and hold from center
– Swipe up from right
– Swipe up and hold from right

Actions

Free

– Home
– Back
– Recent apps
– Toggle split-screen (Android Nougat+)
– Open previous app (Android Nougat+)
– Open Assistant
– Hide pill
– Toggle navigation bar
Premium

– Pull down notifications
– Pull down quick settings
– Open power menu
– Skip to previous media track
– Skip to next media track
– Play/pause current media track
– Show keyboard switch dialog
– Launch app
– Lock screen
– Take screenshot
– Kill all background apps
– Rotate screen
– Toggle flashlight
– Toggle Bluetooth
– Toggle WiFi
– Toggle battery saver
– Toggle screen timeout
– Open volume panel
– Launch Activity
– Launch Shortcut
– Trigger Tasker Event
– Send Intent
– Toggle auto brightness
– Lower brightness
– Raise brightness
– Open app drawer
– Lower volume
– Raise volume
– Cycle ringer mode
– Toggle media volume mute
– Kill all background apps
Root

– Hold back
– Go forward
– Open menu
– Kill current app
– Accessibility button (Android Oreo+)
– Choose accessibility button (Android Oreo+)
– Send keycode
– Send long-press keycode
– Send double-press keycode

Appearance (all free)

– Customize pill color
– Customize pill transparency
– Customize pill border color
– Customize pill corner radius
– Customize pill width/height
– Customize pill X/Y position

Behavior (all free)

– Blacklist pill/show NavBar in selected apps
– Customize sensitivity
– Customize vibration duration
– Customize animation duration
– Automatically hide pill after delay
– Many more

TROUBLESHOOTING:

Setting up ADB: https://www.xda-developers.com/install-adb-windows-macos-linux/

– If your system navigation bar keeps hiding itself, run this ADB command:

adb shell settings delete global policy_control

Or, hit the “PROBLEMS?” button on the main screen and select the option that describes this issue.

– If you uninstalled the app without turning off “Hide Navigation Bar,” run this ADB command:

adb shell wm overscan reset

– If your lock screen icons are cut off, go to Settings>>Behavior>>Blacklisting and enable Don’t Hide NavBar on Lock Screen

Please visit this page for more details on the latest release and to find answers to frequently asked questions.

Check out the official XDA forum thread to leave feedback.

Please visit the GitHub page to report any issues you find.”