I have an iphone 5s and am looking for the best fitness tracker?

I have the New Balance body TRNr and it has given me nothing but problems. I have tons of trouble synch-ing and the battery runs our very fast. What is the best brand/name that works well with the iphone 5s that's not too complicated to sync and will track my distance, steps and calories, etc?

Well, to track like running, Nike + is amazing. It gives a great estimate with what your (running) workout gave you. As with calories burned throughout the day, invest a little in a heart rate monitor, it will give you better results than an app

I think Apple is going to release a fitness app later this year, everyone says iwatch but I'm guessing its going to be a fitness related device.

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