Yale, one of the oldest lock manufacturers in the world, has announced an all-new retrofit smart lock, the Yale Approach Lock with Wi-Fi. Affordably priced at $129.99, the lock is also available bundled with Yale’s exterior keypad for $179.99. The primary appeal of installing a retrofit smart lock is that it doesn’t require the wholesale replacement of your existing lock. The smart component fits over the interior element of the deadbolt that’s already in place. That makes retrofit locks like the Yale Approach a great option for people looking for an easy smart home upgrade, homeowners who don…