Handheld GPS devices are nowadays increasingly replaced by smartphones with
Android-based GPS applications. Moreover, it becomes a matter of concern, given that the
position derived with this application is taken for granted, with over-reliance from users not
aware of potential misleadings and errors the position can befall. For this purpose, two
mobile devices were fitted at fixed point in south Croatia, previously determinated by
differential means. At this obstruction-free location, positioning applications are launched
and received positions have been recorded during hours. After several recordings and data
post-processing, analysis have been carried out in order to determine position deviations in
all directions. Here, the results obtained are presented, giving an insight in GPS positioning
accuracy at the time of observation. The paper represents the basis for further work, where
the same cell phone application will be elaborated in various, more critical situations.