Is it possible to use only region monitoring + GSM and to get not more than 5 km horizontalAccuracy?

Question

I would like to share the info of my performed testing scenarios and to ask you to share your experience with region monitoring. So, I have registered two opposite regions (

Answer 1

In my experience, the region monitoring is pretty accurate without a significant loss to battery life. I have a use scenario of regions that are only 30-50 meters wide. No issues at all with accuracy. One thing I will say, I have only targeted iPhone 4 devices and up. I will need to implement some of the changes you talk about if I want to support the 3GS models.

When relying purely on -startMonitoringForRegion, your updates automatically trigger on the -didEnter and -didExit events. These are triggered through a combination of location tracking events. Significant changes, cell tower transfers, connection to WiFi, another app requests location, and a few others. The OS handles when the callbacks are triggered from these other shared location events. In my experience, it has been very accurate. But this is only for iPhone 4 and up.

I also used the example app from Apple to get things set up, but there isn't a lot of detail in the documentation about the specifics of the when/where you will get your trigger. You can read up on what Apple provides in the Location Awareness Guide. Hope this helps.