It measures the charging current. Try to check if charging is slow measuring the charging current. For fast charging will be measured more than 1. 0 A. If the charging current is ". A" is unsupported devices.
Download the installation package of Ampere Meter 1.0 free of charge and check out users' reviews on Droid Informer. The app works flawlessly on Android 2.3 and higher. The download of this application is safe and secure. Robin android is the creator of Ampere Meter which can be found in the Tools category.
Over 10K users downloaded the app and the latest update was released on May 11, 2016. Users rated this application 2.7 on Google Play.