Iphone

[Outofframe]

Time for a statement about used GPS devices.
My focus is logging hiking tracks.
Using my Iphone 3GS was satisfying, except the poor running time. Logging GPS-Data at with the Everytrail-App isn´t possible longer then 3 hours! Anything else, means logging, taking pictures and load them up, edit trips and load them up is comfortable and nearly perfect, but I am tired of bearing an additional charging device including batteries with me. So I decided to use a GPS mouse which is able to save my trips and allows me to read out logfiles after finishing my daily trips or, due to the storage capacity, of the whole trip. So I use a WINTEC G-Rays 2. This device runs more then 8 hours and is able to log more then 300 000 trackpoints. Charging with USB needs around one hour. The software to read data logs is TimemachineX.

[dodfr]

iPhone 3GS (or any other iOS/Android device) could be used much longer time if EveryTrail add a feature to activate GPS only every xx minutes instead of keeping it active all the time. This feature is useless for biking or car driving because you go too fast and each point would be too far from previous one to get a reliable/precise trace path but for Hiking, I think it is useless to keep GPS chipset active all the time and 5 or 10 minutes time-to-time activation would be enought.

[otto_zickel]

Last weeks I tried out my iPhone 4 to record hiking data during 5 to 9 hours. During the trips I shot up to 50 fotos. Data roaming was deactivated. I used the App "Trails" which switches off the screen in the pocket. Only the longest tour brought the iPhone to the limits - it switched off 10 minutes before my destination (= starting point).
Another issue is worse: The altitude measurements are rather useless. On the trip between 1500m and 3200m NN the iPhone showed errors of 100-200m.
Is there any possibility of calibrating the measurements? (sign posts, refuges)

[chris]

The "Trails" app is not created by us, I would recommend contacting them for any issues you faced with that app.