It's not really cooler. It's a battery operated device that is stuck over you existing twist lock to mechanically twist it for you. It doesn't do much good for doors that have to be shoved a little because of tight fits or thick weather stripping. It also looks like a big white brick on your door. Kevo is definitely cooler but the lack of support for current Bluetooth is terrible.
About that app...
Once you're up and running, you can use the Kevo app to send eKeys to friends, family, and anyone else who may require entry into your home. These eKeys are really just an e-mail message instructing them on how to download the Kevo app and authorize their phones to open your lock. You'll be able to see when people "accept" the eKeys you send out, and you'll also be able to see when everyone is coming and going on a handy timeline. If needed, you'll also be able to delete or temporarily disable those eKeys, too.
While the hardware execution and the general concepts behind Kevo are things worth taking a look at, the platform feels half baked for anyone that doesn't fit the handful of use cases being supported here. Installing this lock on my front door meant uninstalling a Z-Wave capable deadbolt made by Kwikset, and while my current deadbolt lacked Bluetooth proximity detection and a convenient touch ring it works with every device I've ever thrown at it. My existing lock also has a keypad, so people without smartphones (like my children) and people who don't regularly install apps and create accounts for smart things (like my father) can quickly enter and exit my home when I've given them permission to do so. For my personal use, Kevo feels like a step backward.