Ova temp

Katie • Stay at home mommy as of 6/30/16!!!
This am well on Facebook I noticed an app and sponsor that popped up in my newsfeed.  It was called ova temp.  a thermometer that syncs with your Bluetooth on your phone and helps you track trying to get pregnant and your body temperature under the tongue and you get a reading instanly you track on the app. The tracking remind me a lot of the glow app. It seems pretty interesting it's about $75 I think but the app pops up a coupon for $20 off limited amount of them. It comes with a little video which is a little cheesy but it helps explain it maybe I'll look on YouTube and find more information about it with more videos.  I'm
In my TWW and crossing my fingers I won't need this but if not I'm considering it. I have heard and I could be wrong saying this but from friends I've heard that it is tedious to track bbt. My gf with 3 did it once and said forgery it for the other 2.
Has anybody heard of this? Or tried it? Just want to get more information before I decide if I really wanted or not thanks