VersionCode 26 VersionName 1.7.8

MotoG(6)(any others?) can provide inaccurate gps location (perhaps using cell tower?) on first call to get location. So if horizontal signal accuracy is > 300m ignore it and wait to get more accurate position (which seems to occur on 2nd and subsequent locations provided by device.

VersionName 1.7.7 VersionCode 25

Updated for Android O, fixed tablet display.

Added min/max/current altitude to stats

Added gps altitude to stats.