So I mainly use this for tracking while walking. It seemed pretty accurate the first few times. My app reported I had covered a mile in roughly the same spot and within 21-25 minutes. So today I walked in a completely different state so I went completely offline and walked at a faster pace and my app reported I had walked a mile in 37 minutes. So pretty wild. As I walk I run two apps tracking and they both report the same distance so I don't think they are apps. I think it's a GPS device. This is really bad because I wanted this thing to work. But actually it's not. If you want accurate results, don't buy this thing. UPDATE: So I tried some other things with this one. I've tried holding it in my hand while walking and once it went a little better, when I tried again it turned out to be completely malfunctioning again so I ordered a Garmin Glo and it ran a lot better. I took screenshots of the walk from the mapmywalk app. One uses dual GPS and the other Garmin Glo. You can see Glo has been much more consistent. FYI, I don't work for Garmin. If you look at my reviews you will see that I have written reviews of Garmin.
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