Simplify Strava heatrate monitors please!

paulclarke

I thought I was a google expert until now, this is a little frustrating, I know there are a few different solutions out there but there has to be a clear leader or best hearrate monitor for my situation. Very simple, I want to use my iphone 5 and Strava. I don't want an antennae based solution but a monitor that uses the lightweight bluetooth. There are all kinds of options, some come with rechargable batteries, some don't. What is the best heartrate monitor that is well integrated with Strava and has good battery life? Thanks for the help!