Bests & Worsts Reviews from Amazon

TLDR; The Strava app does not use external speed sensors by design and they don't appear to have any intention of changing this, so don't bother purchasing this combo if your sole aim is to use them directly with Strava. You can use the Wahoo app to track your ride and then have it uploaded to Strava, but this means you'd miss out on some of the premium features of Strava that you only get in-app and the Wahoo app is fairly horrible. Overall, the cadence sensor does what it's supposed to do, but I need not have bought the speed sensor since it is entirely pointless to me as someone who uses these exclusively with Strava connected via Bluetooth on my Android.