If having the lock to your front door connected and operable through the internet is still a little too tech savvy for comfort, then perhaps something that isn't so accessible but still as convenient is a more reasonable option.
The Remock Lockey is basically a dead bolt with an antenna that can be opened by a keyfob similar to what you have for a car. At $163 it is definitely more expensive than a regular deadbolt, but not outrageously priced. Since my Korean is non-existent, I'm not sure this is true, but unlike the other remote controlled door lock options we have shown you, this one doesn't have a keypad in case the remote doesn't work. That could make for a bad situation when you get home in the middle of the night.