20 years using numerous garmin and magellan handheld units in exploration industry. This is a very good app with a really good variety of uses/pages, however advice, email communication and tutorial from designers seems lacking. Once you figure out the tabs and selections and protocols for using and visualizing this and that, then you realize the potential. The +/-4m accuracy compares in speed and accuracy to the $300-$600 units. I need to know though how many hundreds if not thousands of points I can capture likewise the amount and density of line/track/path data I can create in real time... I am currently using this every day in a remote area and need to ensure how to save the data for easy use on a laptop, google earth and on a conventional gps.. either way, once you spend the ~$12 it is well worth it, spend the time on trial and error, learn to test the buttons and choices, export and important data asap in case of the usual crashing/theft etc.
So far so good; I just got the app and haven't been able to test it very well. I will rate it again later, after that I get a chance to play with it a little bit.
This ap now works great after they fixed the blank map screen issue with my Samsung S8+.
Has all the bells and whistles
The only GPS that I can find with downloadable maps. Also rather accurate
Smart card sim card
*** FIXED BLACK MAP ON GALAXY S8, NOTE 8 and some others with irregular dimensions. ***
*** Includes other optimizations for the Galaxy S8 and Note 8.