Carat app , for iOS and Android devices , was produced by University of Helsinki and University of California , Berkeley computer scientists . Uses crowdsourced data to investigate a phones ' energy consumption . Monitors phone usage a week , feeding data to a central server . Information is analysed and personal power-saving tips given to users . Suggestions include shutting certain apps down or upgrading software . The longer the app is used , the more tailored the suggestions become .
Carat app , for iOS and Android devices , was produced by University of Helsinki and University of California , Berkeley computer scientists . Uses crowdsourced data to investigate a phones ' energy consumption . Monitors phone usage over a week , feeding data to a central server . Information is analysed and personal power-saving tips given to users . Suggestions include shutting certain apps down or upgrading software . The longer the app is used , the more tailored the suggestions become .