Two Devices

[Bmack]

I have two phones i88 & i860. The Geo on the i88 is set for 500 ft and the geo for the i860 is set for 100 ft. They are both in the same vehicle but the i88 at 500 ft notified me 1st that my target had left the area. Just thought you might want to know. Still Happy! Bmack....

[ATSupport]

First, 100 ft geofence will eventually annoy you a lot in that the GPS signal fluctuation is within that range, you'll likely get quite a lot false alerts or no alerts (that's why the geofence setting page says at least >300 ft).

The fence within the GPS noise range has a good chance of messing up the alert.

False alerts:

Suppose the phone is in the small fence that is within the range of GPS signal variation. This variation will make it look like you are jumping out and into the fence from time to time, even you stand still inside the fence. Thus false alerts.

No alert:

In your case, the i860's GPS data has probably never been inside that small fence because of the signal fluctution, so AccuTracking never saw you cross the fence (in the extreme case, imagine that you have a fence with 1 ft radius, what's the chance of a jumping ball being inside that fence).

All in all, don't use small fences less than 300 ft. Keep in mind the GPS signal has margin of errors.

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