新特性V.1.3.1Added server sync time preference setting.Support ios platform communicationBugs fixedV.1.2.5Added new function to support meetup point.Changed UI scenario.V1.2.4Added hide function to make yourself invisible from your friend.Support international standard and imperial metrics system.V1.2.3Added UTF8 name decodeV.1.2.2Fixed bug to reconnect GPS.Added preference storage.V.1.2.1Added distance view.