I have the Inreach Explorer and really love the texting capabilities and sense of security of the S.O.S, however the actual GPS functions, although work, are in my opinion leaving a lot to be desired. I dont want to drop another $400 on a GPS so I was wondering if guys are just using their smartphones and apps primarily like GAIA and OnX by downloading the area maps before going in. Have these proven to be accurate and useful?. Thank you.