Názor jiného, zřejmě znalého:
http://www.mountainsafety.co.uk/Nav-GPS ... -Apps.aspxP.S.
K aplikacím se tam praví:
Position Only Apps
Limited in functionality, these apps do one thing, which is to display your position as calculated from GPS satellites, as a BNG grid reference. If you have a smartphone, you should have one of these apps installed as a backup to your GPS unit. If you don’t have a dedicated GPS receiver, this type of app is better than nothing.
There are a number of such apps available, with the one opposite & detailed below being one that I’ve used. Basic, but useful, and takes hardly any phone memory (this good for battery life) and it's accurate, in my experience.
Grid Reference App - click :
A word of warning: most of the apps are free downloads, so you would be well advised to test out the accuracy of them whilst at known locations, before needing your position in a situation when you are mis-located. Licence conditions for the software will effectively say that the software has no warranty to actually work.
Remember also that your smartphone will be of limited use in the wet, or if dropped. A dedicated GPS unit is more robust in that respect, but again, a GPS app is better than nothing.