Use phone gps to improve accuracy

Your phone's accuracy will be LESS than the watch when running or otherwise engaged in an activity.

There are plenty of people who use their phones as a GPS recorder in my running group and all of them have FAR worse accuracy and tracks than my Fenix. It's not even a close comparison.

Phones cheat when doing turn-by-turn -- they look at direction and velocity of travel to figure out which side of the road you're probably on. In addition when in a car the phone has a clear view of the sky through the windshield and is not bouncing around, so the aspect (angle of incidence) of the sensor to the satellites is not constantly changing, as it is when you're running.

I'm just wondering why one would buy a $750 GPS watch yet use their phone for GPS... the whole reason I bought mine is to leave my phone at home

I'm just wondering why one would buy a $750 GPS watch yet use their phone for GPS... the whole reason I bought mine is to leave my phone at home

I swim laps so it is my main reason to buy the watch. From there it makes sense to monitor all my activities from the same device but carrying my phone while running is not a problem at all for me. I also want to monitor my sleep time and my everyday HR so I want an everyday watch. Although I could find a cheaper device doing what I "really" need, I don't want to wear a fitness band in my everyday life. I was hesitating with the F5 but I could use the map functions in other outdoor activities (hiking, kayaking) even though I probably won't use it so often.

Your phone's accuracy will be LESS than the watch when running or otherwise engaged in an activity.

There are plenty of people who use their phones as a GPS recorder in my running group and all of them have FAR worse accuracy and tracks than my Fenix. It's not even a close comparison.

Phones cheat when doing turn-by-turn -- they look at direction and velocity of travel to figure out which side of the road you're probably on. In addition when in a car the phone has a clear view of the sky through the windshield and is not bouncing around, so the aspect (angle of incidence) of the sensor to the satellites is not constantly changing, as it is when you're running.

Hi, interesting to know as I thought it was the opposite from this : http://fellrnr.com/wiki/GPS_Accuracy

I will test as well when my watch arrives :-)

A vendor that will only be known as FB, tried to convince people that using GPS off the phone was just as good as having it on the watch (after they failed to release a GPS device and their stock price fell). ALL vendors have a few friendly bloggers that will parrot the company line..

But trusting your phone's GPS is probably like using a 300 baud modem to back up your high speed internet! :)

A vendor that will only be known as FB, tried to convince people that using GPS off the phone was just as good as having it on the watch (after they failed to release a GPS device and their stock price fell). ALL vendors have a few friendly bloggers that will parrot the company line..

But trusting your phone's GPS is probably like using a 300 baud modem to back up your high speed internet! :)

Thanks for making it clear ;-)

Hi, interesting to know as I thought it was the opposite from this : http://fellrnr.com/wiki/GPS_Accuracy

I will test as well when my watch arrives :-)

I believe cell tower triangulation is also a factor there somewhere too.