iTrail now works while in the background ! Whether you
take a call, listen to music or surf the web, iTrail will continue
recording your location. This will work for all users of iPhone 4 and
3GS running iOS 4.
But, please be aware, continued use of GPS running in the background can
dramatically decrease battery life.
Below is a screen-shot of the home screen from iTrail. To start iTrail measuring your location, altitude, speed and distance, just press the start button on the bottom left, to stop measuring press the stop button on the bottom right. To reset everything press reset, the bottom middle button. Used in this way iTrail will not record any performance data to its internal database. See below to understand how to record this data.
iTrail has a lockable screen so that recording your trail will be less
disrupted by environmental conditions. Just press the padlock to lock,
then slide the slider to unlock.
Data can me shown in metric units, meters and kilometres, or in
imperial units, miles and feet. You can switch between these two modes
by using the settings menu accessed by pressing the Settings button on
the right of the tab bar.