I ran into this company called Secfone (or navayo?). They have an app that provides end-to-end encryption calls and messages. The privacy policy seems fairly clean, no analytics.
The only issue I found so far is their website doesn't have a secure HTTPS connection.
Things don't seem very updated probably because its not very popular.
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Also, there are good foss projects for instant messaging. First thing I look whenever I search for app or program to use is their foss-ness. Its great condition for transparency of that project
@nikolal We already have Wire and Signal as great messengers so I think we're fine.
I wasn't even able to use the Secfone app, it wanted me to choose my PIN, but every PIN I tried gave me an error since the app is broken or not supported. It was last updated almost a year ago.
Even their website shows copyright of 2016, thats almost 4 years.