Are you constantly on the go and sometimes forget to lock the front door, then realize it halfway to your destination? Lockitron has designed a lock system that allows you to check and lock the doors to your home through your smartphone. The device fits over the deadbolt lock already installed on your door and has built in WiFi that runs off of your home internet connection and allows you control from anywhere. The device is compatible with any smartphone and can even be used with older phones through text message commands. It uses the same security that is used in online banking making it as safe as can be. The device itself is $179 and the smartphone application is free.