can everytrail pro on iphone work without data plan?

[kakachi]

Hi intending to visit Sedona and Flagstaff, AZ soon.
As overseas data roam is expensive I intend to switch off data connectivity on my iphone 4. Wondering if I can still get GPS tracking on the downloaded maps I have on everytrail pro. Thanks.

[chris]

Yes, GPS will work without a data plan, but assisted GPS will not, which means that it may take longer to find a signal than when using wifi for help.