I guess it depends on your needs/intended usage, but I have a cheap indoor wi-fi connected cam with motion detection. It sends me a text when it detects motion, at which time I can open the device's app and view what the camera is seeing. Motion detection can be turned on/off via the app, so I only enable it when we're away for an extended period. Initially, I had the sensitivity for the motion detection set too high, and just the casting of shadows would trigger the motion detector, and I was getting multiple texts per day while on vacation, which was disconcerting. At that point in time I thought the device was going to be semi-useless. But after adjusting the sensitivity and the target "motion field", I've been pretty pleased.
Obviously, this is a very low tech, unsophisticated solution, but it's pretty good for first order security.