"So when did the battery run down?" I can answer that query. Here we can check automatically in the background the amount of battery remaining and plot it on a time series graph.This shows us why and when the battery runs down. Further, when it runs down suddenly or goes below the set volume it will notify you with an alarm. This enables you to prevent the battery running out unexpectedly. This will let you use the iPhone with confidencePlease make use of the "BatteryAlarmer!". -This lets you grasp the battery data for today and the past 10 days. -It is possible to use 3 more setting values for the alarm in addition to when the battery suddenly runs down.-In the case of using,please turn on the Background App Refresh switch in Settings.