Your home security when you aren’t at home is about protecting your possessions, saving you from making costly insurance claims and destroying your sense of safety in your own home. This doesn’t mean that you can ignore your home security when you are inside the house, though. When you’re inside, there is something much more valuable than possessions inside your home … you and your family. Knowing who is on the other side of the door is critical to your personal safety and home security -- but what product helps assure your safety best?
Peepholes

These were once common in homes, but have recently fallen out of favor. They don’t always do what they are designed to, as intruders could easily duck out of the peephole's way, or turn their back. Our natural curiosity means that we usually open the door anyway! Open style peepholes are a safety risk, with people able to poke things through them. And even if nobody who means you harm ever comes to your door, people can't escape the uncomfortable feeling that someone can see them, but they don’t have the same ability, when there is a peephole in a door.
Video door phones
Obviously, despite the problems with peepholes, they are the cheapest way to add to your home security by discovering who is knocking on your door. Most models today are quite vandal-resistant, and some have built in infrared illumination to allow you to see who is at your door even in dark conditions. While the audio version is obviously cheaper, being able to see exactly who is at your door gives you greater opportunity to assess their intentions and truthfulness.
Door viewers
In technicality, these land somewhere between ordinary peepholes and video door phones. They also land somewhere in the middle price wise, and are currently the preferred solution for many home security experts. You can get up to around 200 degree viewing angle quite easily, and while they need more knowledge for installation, builders are usually sufficient -- not as expensive as electronics experts. Look for one with an inner privacy lens cover, and expect to pay between $20 and $50.
