Originally posted by lt-m-grow: I posted this on this thread http://tradgang.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=1;t=150522 but will offer it here too.... whenever I hear - I use this cellphone app - I cringe. They are great for the back woodlot, horrible choice for the mountains. Why? Low grade GPS, poor screen visibility in sunlight, it will use up your battery and bringing a backup battery pack seems silly, it isn't durable if you drop it or fall on it, and will not handle moisture...and probably more. Please never use a cellphone app as your only source for direction in big country.For me it is printed map, gps and a compass. And I even have maps on my gps and still carry a printed map.