This is a great app that completely transforms my iPhone into a high performance cycling computer. I use it with multiple external sensors simultaneously including a Garmin cadence sensor, speed sensor, and a heart rate monitor and everything works like a charm. For my training rides under three hours, my phone has absolutely no issues with the battery. Battery life is the main limitation for anything longer than that, but I easily managed to solve this for longer rides by using a portable battery pack. I also love that I can save my history files in FIT format to upload them to Gemini for evaluation, review, and training program development. I highly recommend Cadence app definitely performs.

ECO. Roger