For a few years now, smartphone users have been concerned about the possibility that someone or some security agency might be spying on their communications. That is why certain developers started creating apps like RedPhone: an end-to-end call encryption application that featured the options listed below.

RedPhone 2.0 Main features

End-to-end call encryption.

Uses regular phone numbers for outgoing and incoming calls, without the need for ID.

No voice minutes consumed, just data or WiFi plan.

All calls are free.

Uses the regular default dial pad and contact apps.

The service is free and open source.

This is an app that hasn't been updated for several years and has had no developer support, so it might not work properly. However, there is a good reason for this: its creators are from the Open Whisper Systems studio, which currently runs the Signal app. If you liked their calling encryption app, we recommend you download this messaging app, which is also all about end-to-end message encryption and is available on Malavida.

RedPhone 2.0 Requirements and additional information:

Minimum operating system requirements: Android 2.3.

RedPhone 2.0 NewS

Concerned that your phone calls might be being spied on? Get RedPhone and converse at ease in the knowledge that your communications are encrypted