I've just got back from Vietnam and used the My Tracks app on my Google Nexus 4 to see where I went for certain trips. It was pretty effective and didn't use a lot of battery, even for a 4 hour track. I just turned on My Tracks and put the phone in my pocket. Features such as the dropped blue pushpin on my phone were saved and I opened the tracks as .kml files from Google Drive - most features except for speed colour coding came across to the desktop. Neat feature.
