What are the best messaging apps for iOS?

Platforms:Android, iOS, Linux, Windows, Mac OS X

End-to-end encryption:Yes

Audio recording:Yes

VoIP:Yes

Platforms:Web, Android, iOS, Windows, Linux, macOS, BSD, Windows phone, UWP

End-to-end encryption:Secret chats

Audio recording:Yes

VoIP:Yes

Platforms:Web iOS Android OSX Windows Linux

End-to-end encryption:Yes

Audio recording:No

VoIP:Yes

Platforms:Web / iOS / Android / OSX / Chrome

End-to-end encryption:No

Audio recording:No

VoIP:Yes

Platforms:Android / iOS / WP / BB / Symbian / Windows / OSX / Linux

End-to-end encryption:Yes

Audio recording:Yes

VoIP:Yes

Platforms:Android, iOS, Web, Mac, Windows, Windows Phone

End-to-end encryption:Yes

Audio recording:Yes

VoIP:Yes

Platforms:Web, Windows, Linux, Mac, iOS, Android

Audio recording:No

Videoconferencing:Yes

Groups:Yes

Platforms:Android / iOS / WP

End-to-end encryption:Yes

Audio recording:Yes

VoIP:No

Platforms:Android / iOS

End-to-end encryption:Yes

Audio recording:Yes

VoIP:Yes

Platforms:Web, Windows, Linux, Mac, iOS, Android

Platforms:Windows, Linux, Mac, Mobile

End-to-end encryption:Yes

VoIP:Yes

Videoconferencing:Yes

Platforms:Android / iOS / WP

End-to-end encryption:No

Audio recording:Yes

VoIP:Yes

Platforms:Android / iOS

End-to-end encryption:no

Audio recording:no

VoIP:no

Platforms:iOS, Android, WP, OSX, Windows, Linux, Web. Blackberry. Chrome OS. BSD, iPadOs

End-to-end encryption:yes(optional)

Audio recording:yes

VoIP:yes