Interesting and open-source Android apps

Paul57 appsUpdated Apr 4, 2018

A list of interesting and open source https://alternativeto.net/software/android/ apps.

Spectre
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Spectre (prev. Master Password) is a password manager which uses it's own, original algotithm: Instead of saving and sending passwords across the internet, Spectre calculates the password you need, only when you need it, then throws it away again.
Cost / License
Free
Open Source
Application type
Password Manager
Platforms
Mac
Linux
Online
Android
iPhone
Paul’s note
Master Password is not another password manager. This app will replace all your passwords with new strong passwords generated from your new master password; passwords are stored nowhere and need no sync, cloud or backups. This app will securely generate strong and unique passwords for any purpose, in a way that nobody can log or trace. Better yet, even if you somehow lose everything, you can effortlessly recreate all your passwords.
Bitwarden
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Open-source password manager with AES-256 encryption and device sync. Store and access encrypted logins across platforms like iOS and Android.
Cost / License
Freemium
Open Source
Application typeApplication types
Password Manager
Authenticator
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
+11
Paul’s note
bitwarden is 100% open source software. The source code for bitwarden is hosted on GitHub and everyone is free to review, audit, and contribute to the bitwarden codebase.
Android IMSI-Catcher Detector
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Detects fake mobile towers, alerts about Man-In-The-Middle attacks, monitors signal anomalies, silent SMS messages, and tower inconsistencies for privacy protection.
Cost / License
Free
Open Source
Application type
Network Analyzer
Platforms
Android
Paul’s note
AIMSICD is an Android app to detect IMSI-Catchers. These devices are false mobile towers (base stations) acting between the target mobile phone(s) and the real towers of service providers. As such they are considered a Man-In-The-Middle (MITM) attack. This surveillance technology is also known as "StingRay", "Cellular Interception" and alike.
OpenKeychain
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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...
Cost / License
Free
Open Source
Application typeApplication types
File Encryption Software
Privacy Tool
Platforms
Android
Android Tablet
K-9 Mail
Paul’s note
OpenKeychain helps you communicate more privately and securely. It uses 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 systems.
FreeOTP
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FreeOTP is a two-factor authentication application for systems utilizing one-time password protocols with support for Android (6 or later) and iOS (11 or later). Tokens can be added easily by scanning a QR-code or by manually entering in the token configuration.
Cost / License
Free
Open Source
Application type
Authenticator
Platforms
Android
iPhone
Android Tablet
iPad
Paul’s note
FreeOTP is a two-factor authentication application for systems utilizing one-time password protocols. Tokens can be added easily by scanning a QR code. FreeOTP implements open standards: HOTP and TOTP. This means that no proprietary server-side component is necessary: use any server-side component that implements these standards. We recommend FreeIPA.
Android Terminal Emulator
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Android-Terminal-Emulator - A VT-100 terminal emulator for the Android OS.
Cost / License
Free
Open Source
Application type
Terminal Emulator
Platforms
Android
+1
Paul’s note
Android Terminal Emulator is a terminal emulator for communicating with the built-in Android shell. It emulates a reasonably large subset of Digital Equipment Corporation VT-100 terminal codes, so that programs like "vi", "Emacs" and "NetHack" will display properly.
Termux
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Access a full Unix environment on Android without rooting. Automate tasks with command-line tools, ssh, and package installs via Apt.
Cost / License
Free
Open Source
Application typeApplication types
Terminal Emulator
Shell
Platforms
Android
Android Tablet
F-Droid
zsh
GNU Bourne Again SHell
Paul’s note
Termux is a terminal emulator and Linux environment bringing powerful terminal access to Android.