It creates fun opportunities and surprises — such as teasing a birthday cake before wishing someone a happy birthday.

You can learn more about Google Duo by reading our article as we go hands-on with Google’s new video calling app.

The reason that Facebook Messenger is perhaps the best choice on this list is the fact that you probably already have it, and most of your friends do too. Simply open up the app, press on the person you want to call, and tap the camera button in the top-right corner.

In i OS 10 you can add those favorites as a widget and start a Face Time call from your lock screen.

Face Time certainly doesn’t offer the most bells and whistles of any client on our list, but it’s already integrated within i OS and doesn’t require any additional software or advanced setup.

The app will let callers know the video is visible to the other person.

You can only do this with people who are already in your contacts, and if you decide that this isn’t something you like, you can disable it in settings.

Seeing an opportunity to connect people even further, a duo from Sweden unveiled Skype in 2003.

The service — now one of the most popular chat clients in the world — conveniently allows users to see one another using a webcam while talking as if they were facing each other in the same room.

making them the lowest-cost form of videotelephony.

Despite the low cost, the resolution offered at present (2015) is rather impressive, with low-end webcams offering resolutions of 320×240, medium webcams offering 640×480 resolution, and high-end webcams offering 1280×720 (aka 720p) or even 1920×1080 (aka 1080p) resolution.

A webcam is a video camera that feeds or streams its image in real time to or through a computer to a computer network.

When "captured" by the computer, the video stream may be saved, viewed or sent on to other networks via systems such as the internet, and emailed as an attachment.

Facebook Messenger is available for i OS, Android, and also via any web browser logged into your Facebook account.