Japkin

Japkin is free communication app that uses your phone’s Internet connection (4G/3G or Wi-Fi, as available) to message and call friends and family. Switch from SMS to Japkin to send and receive messages, make HD video and voice calls, share HD photos, videos, and attachments.

Here's what you get with Japkin:

* IM Style Chat

* Group Chat

* Make Live Video/Voice Calls

* Make Live Group Video/Voice Calls

* Make App to Mobile Browser Live Video/Voice Calls

* Make App to Desktop Browser Live Video/Voice Calls

* Make App to Desktop Browser to Mobile Browser Live Video/Voice Calls

* Join Desktop & Mobile Browsers in Live Video/Voice Calls

* Share Video Messages in HD (720p) Up To 10 Minutes in Length

* Share Video Messages with Groups

* Share Photos in HD (Full Resolution)

* Share Photos with Groups

* Share Voice Messages Up To 10 Minutes in Length

* Share Voice Messages with Groups

* Share Large Attachment Files (More than 25mb) e.g. PDF, Word, Excel

And much more!