This is the Donation key for the App called Polarity Checker. Purchase this key if you want to support development or if you want to remove Ads. Notes: Removing Ads will work from Polarity Checker version 1. 2 and up. If you uninstall this key, the Ads will show up again. This Key won't showup as an extra App in your app drawer.
It's secure to download the app. Polarity Checker has been originally developed by DWA ICT Solutions and it relates to the Music & Audio category. Over 100 users downloaded and installed the tool and the most recent update was on Apr 12, 2013.
Google Play shows that this application is rated 4.3 by its users. It's free to download the installer of Polarity Checker , also, you can take a look at users' reviews on Droid Informer. The app works fine on Android 1.5 and higher.