All smartphone GPS systems are not created equal. Be aware that the various smartphone models available offer have different quality or functionality in that regard.
When the GPS tracking is on, the battery life of the phone decreases significantly. What this means is that the GPS phone may not last an entire work day without requiring at least one re-charge.
The actual trip recording length is dependent on the individual smartphones battery condition, temperature, the use of other running background applications and call usage.
As with all GPS receivers the quality of the GPS signal can vary depending on the amount of visible sky, satellite positions, foliage, weather conditions etc. And the GPS system will not reliably work indoors.
Under certain conditions the GPS signal can be lost easily; and this might negatively affect the quality of the travel log book reports within .
We use the OpenStreetMap to display your trips on an interactive map. Since OpenStreetMap‘s are run entirely on donated resources and have limitted capacity, heavy use of the OSM map might adversely affect other people's ability to use the map.
The app does not need a data connection or a phone signal to record your trips, and the location system on the smartphone may from time to time automatically use GPS data for location fixes, and we have no control over this. THEREFORE WE STRONGLY RECOMMEND SETTING DATA ROAMING OFF IF YOU ARE USING YOUR PHONE ABROAD AND TURN OFF CELLULAR DATA IF YOU ARE ON A FIXED DATA PLAN.
Inaccurate addresses in trip book
Our solution takes a pair of latitude / longitude coordinates taken by GPS smartphone, such as: 48.145676, 17.122345 and interpolates the nearest possible address that would equate to that location, such as: Grosslingova 54, 811 09 Bratislava, Slovakia. For this we use external service that is called reverse geocoding. Sometimes the service will not return the most accurate address. The reasons behind this are:
- The inaccuracy in the coordinate calculation of the GPS. Inaccuracies can be anywhere from 15m to over 100m (think the length of a small street).
- Unless the velocity of travel for a specific GPS point is known, multiple streets might be candidates for the closest street to the point.
- The underlying road contains only address ranges, not specific address points. This forces the reverse geocoding engine to guess at the address :)
Please be aware that addresses returned by the reverse-geocoding operation are best-guesses and might not be entirely accurate.