Keybase is the best and secure messaging and file-sharing app which is supported on Android, iOS, macOS, and Linux. It has a built-in Stellar wallet where you can securely store, receive, and send your XLM balance. It is completely free to use and another interesting fact is, this app does not show any sorts of aggressive ads to irritate you while using.
Some of the interesting facts about Keybase:-
Last time Keybased launched one of the biggest airdrop named "The Big Stellar Space Drop" with the help of SDF(Stellar Development Foundation).
It is an open-source platform you can check here https://github.com/keybase/client
It has more than 407,163 active users from all around the world
It supports different wallet addresses like Bitcoin, Zcash, and Stellar, etc
On May 7, 2020, Keybase was acquired by Zoom Video Communications
Advantages over other similar Apps
This app has so many exceptional features. If you are concerned about the security of your personal chatting messages, it can be the best option for you because all messages are secure, end-to-end encrypted. The developer team has a long story behind it. They have worked very hard to make it the best messaging app. You can also check it to feel the difference. By using the Keybase app, you can write securely to any twitter, Reddit, Facebook, GitHub, and hacker news user. It supports multi-device: your messages survive and transfer with encryption to new phones & computers.
Development team
Chris Coyne, Max Krohn, others
Photo
Brief instructions for use
First of all, decide on which device are you planning to install Keybase software. I have included download links for some major OS below.
Now, install the app on your device
Sign up for an account it is easier to do
Fill in your profile with the required information and Prove ownership of other supported accounts(social media accounts) / websites inside the app.
At last, do not forget to create a paper key which is very important to access your account in the future. I suggest you create at least one paper key and link your account with another device say your PC.
(Note:-Myself, I have tested this app. If you have any doubts and questions, you might ask me questions on this topic. Thanks for your time😊.)
Relevant links
https://keybase.io/
For iOS devices:-https://apps.apple.com/us/app/keybase-crypto-for-everyone/id1044461770
For Android:-https://play.google.com/store/apps/details?id=io.keybase.ossifrage&hl=en
For Windows Devices:-https://keybase.io/docs/the_app/install_windows
https://en.wikipedia.org/wiki/Keybase