Best app for temping?

I'm buying a basal thermometer today (any advice on best one?) and am going to start temping tomorrow morning. I'm in the middle of the book "Taking Charge of Your Fertility" and it's been very informative- highly recommend! In the book, the author reccomends and app called Ovagraph. Ice also downloaded Fertility Friend and a couple others. However, I find them all the be a bit confusing to navigate and poorly designed. Of all the apps I've tried over the years while tracking my period (not for ttc purposes) thus far, Glow is hands down the most user friendly and nicely designed app! I just wish it had more features geared toward temping (graph)