Does the full, paid version of GSam Battery Monitor run on the Galaxy S5 or must one also install the GSam Battery - Root Companion to root the S5 to be able to run it?
GSam Battery Monitor will work on an unrooted S5, but the thing to keep in mind is that on devices running KitKat, not all GSam features will work (mostly wakelock detecting). If you root your phone, then GSam can detect and list your wakelocks.