August's 4th-generation smart lock, the August Wi-Fi Smart Lock, eliminates the bulk from previous generations and builds Wi-Fi support right into the lock.
Built-in Wi-Fi is just the beginningWi-Fi built-in (no external bridge required)Nearly 50% smallerImproved gripInstalls in 10 minutes or lessDon't need to completely remove existing deadbolt (renter-friendly)Shorter battery lifeUncommon CR123 batteries
The 3rd-generation August Smart Lock Pro requires an external August Connect bridge to connect to your home's Wi-Fi network, and it's quite a bit larger than the August Wi-Fi Smart Lock. On the bright side, it's got twice the battery life.
Still great for prosLonger battery lifeAA batteriesInstalls in 10 minutes or lessDon't need to completely remove existing deadbolt (renter-friendly)Can work offline with Z-Wave hubs like SmartThingsRequires external bridge for Wi-Fi connectivityLarger
Four generations of excellenceThe fourth-generation August Wi-Fi Smart Lock not only shrinks the physical size, but it also packs Wi-Fi connectivity right in.Still a great smart lock
Easy and long-lastingThe August Smart Lock Pro (3rd-gen) is still one of the easiest smart locks to install and use, and it's got fantastic battery life, too.