Originally Posted by KeithNorCal
Personally, I prefer not to use my iPhone for the battery reasons everyone has mentioned. I have a Garmin 820 and like it, but I don't use any remote sensors (yet).
Originally Posted by RonHarvey
I have used the mobile phone to track travelled distance and speed, but the battery juice drains a lot. Hence, I had to give up the idea of using the phone. I bought Fitbit surge which logs the accurate speed of the user. You can view the speed in the Fitbit dashboard.
I used an iPhone 5c for just over 2 years that had three BlueThooth sensors connected to it. After doing some tweaking to the individual apps and phone settings, I was using 10% battery life/hour. Earlier this month, we upgraded all our phones to iPhone 6SE. I still use my iPhone as a bike computer with the same three BT sensors connected to it and now use less than 5% battery life/hour. If done right, you don't need multiple devices to accomplish the same thing you can do with a phone. I don't have anything against standalone GPS devices but since I carry my phone with me anyway, it just makes no sense to me to have a duplication of service and have to spend more money to do so.