Kindara Bluetooth BBT thermometer

What do yall think of this new wireless/Bluetooth BBT thermometer? It syncs wirelessly to the Kindara app and claims to do all your tracking for you.
I've never charted my BBT before so I don't have any experience doing it with a regular thermometer. Does this fancy Kindara thermometer sound like it's worth the price for the convenience? ($79 intro price) it's called the "Wink"  I think... 
I've always been intimated by BBT charting and this looks like it would make it a little easier. I know charting BBT is arguably the best method out there for fertility tracking! Thoughts??