EMFB 4.18 update.. v4.17 and the free "June trial copy" will quit working by mid July
Please check the GOOGLE PLAY store in a few days for an update to 4.18+
This will fix the "won't start bug" that sometimes makes EMFB fail to start if there is no data connection when you first open it..
(error: "file not found")
It will also use "ft" instead of meters for accuracy and altitude.
YOUR "old" 4.17 will stop working by the middle of this month due to the "won't start bug".
.. So be sure and update to 4.18+ before then.
Be SURE and download the newest version of Google MAPS..
It allows for LARGE area "pre-caching"
I was able to download almost the entire Smoky Mountain National Park and "no signal" was no longer a problem.