Facebook Messenger is one of the most popular messaging apps on the planet. We know that a lot of people don't like the app. We agree that it still needs a lot of work. However, there are so many people that use Facebook that Facebook Messenger just makes sense. The video chat experience works relatively well. Since most of the people you know are on Facebook, it's easier to use this app than to convince everyone to join a new platform. Plus, the new ads rolling out aren't great. It's not perfect, but it's perhaps the most convenient of the video chat apps on this list. At least it's free.
Imo is a simple video calling and chatting app. It boasts compatibility for 2G, 3G, 4G, and LTE networks. That makes it good for those stuck on worse connections. It's also compatible with both iOS and Android. Otherwise, there isn't much to this one. That's not necessarily a bad thing. Aside from text chatting and video calling, this app doesn't have any bloat holding you back from a simple experience. It's free to download and use. The only thing you'll need to deal with is some advertising.
Any smart doorbell worth its salt is equipped with a video camera that sends an alert to your phone along with a live video stream when the doorbell button is pressed. Video is accessed via a mobile app that is also used to install the device, configure wireless settings, and set up alerts. You'll pay more for doorbells that offer features like 1080p video, motion detection, two-way audio that lets you speak with whoever is out there, and on-demand video streaming. To avoid false alerts from passing cars, high winds, and any critters you may have roaming around your property, look for a doorbell cam that offers customizable motion zones.