Imo

imo provides free video and audio calling along with messaging, aimed at keeping family and friends connected across devices including Android, iOS, Windows and Mac. Privacy features include end-to-end encryption, a Time Machine feature and disappearing messages, alongside two-step verification and spam blocking for account security, positioned on the site under the headings Audio & Video, Private and Secure, describing the service as free, simple and secure.

The app also offers instant message translation intended to support conversations across languages, described on the site as effortless translation for seamless cross-language conversations.