Free, i OS and Android Missing some of the bells and whistles that the other apps on this list have, Imo offers a simple, streamlined way to send messages and make video and voice calls.
That's great for people who just want to make a call and then move on.
If you have an i Phone or i Pad, your top choice would likely be Face Time, since its built into the operating system and works well.
But if you're rocking an Android phone or tablet, you'll need to pick another app to help you stay connected.
What's not: The app can be glitchy, especially when trying to hang up a video call. Since it got its start sending text-based messages, that's still where Viber shines.
Free for i Phone users, it asks to link to your Facebook to access your location, photos, interests, plus ‘friends’ who are signed up too.Google's own video and messaging app is one of the most popular ways to make voice and video calls from your Android phone, and that's not just because the app usually comes pre-installed.The app grabs contacts from your Google account and phone's address book so that you can send text messages, place voice calls and start a Hangout, which is what Google calls a video chat.And if you have a Google account, you can already use Hangouts -- there's no need to sign up for anything new.What's great: Hangouts organizes your conversations by person, and you can send messages, and start voice and video calls from one place.