inputs.text: excellent trackmaster app - bought device purpose using trackaroo trackmaster app android evo 4g pros cons experience pros amazing battery life sleep features setup weekends track event leave forget accurate 5hz though tricky set see cons locks satellites fast even indoors wakes sleep mode bluetooth request helps lot battery life used two day motorcycle track event worked flawlessly cons included software bit mess works needs sort place setting sampling hz rate done special app not available apps gps setup menus battery life indicator no gradations dont know much power left plan use events practice commute work around town easy use setup take getting used dont want figuring five minutes session starts originally ordered 818x received device returned 818x received device decided keep really wanted expensive unit highly recommended bought one girlfriend rides track data isnt always kind ego hahaha