[aldarn]

Check out Dialpad (https://dialpad.com) - it has native apps for all the platforms that you listed, and no attachment to social networks. You will also receive a phone number.

Feel free to ping me if you have any questions.

Disclaimer: I am affiliated with Dialpad.

[xevb3k]

Page opens to geoip set language with no obvious way to change it... so I gave up.

[aldarn]

Not sure what you mean by this? Where are you based? The language can be set in the top left corner.