Not very useful as app stands – Battery Alert: Alert when battery low or full level Review

App should give option to set battery level to get a low battery alarm and should be running all the time in the background. Selected Alarm levels for low battery at 40% or 30% or 20% , etc. would be helpful. As batteries age they become unpredictable and my phone goes off when battery state is 30%. I have an extended battery case and if the low battery alarm went off I would have the extended battery kick in to charge iPhone battery.
Review by discouraged mike on Battery Alert: Alert when battery low or full level.