If you use strava, you have a device with GPS, like your phone or bike computer. alternatively you can use a watch with that all in one device. the key is that device needs GPS or there wouldn't be a way to tell Strava where and how far and fast you went.
any of the ANT/BLT HRM will work with that device (note, some cheap phones only have BLT, but most better HRM have both BLT and ANT)