Stop Over charging app is very useful to prevent battery from overcharging when battery reached to 100% charging. The battery full alarm app will alert you when the battery is fully charged. Another feature is that when someone unplug your phone from charger it will also give you an alert, user can turn ON/OFF this feature from the setting.
Stop over charging app will also give you an alert when battery reaches to its low level, you can turn on/off this feature from setting and can also set low battery notification level.
Sometime we are very busy and forget to check battery status, so in this case battery alarm app is very useful for over charge protection and to alert us when battery is fully charged and prevent battery from overcharging because overcharging will damage battery life.