Advertisements are a part of this application. The app is often downloaded by Micromax and Panasonic users. It's free of charge to download the .apk setup package of Caller ID Announcer and you can take a look at users' reviews on Droid Informer. This application installer requires 5 MB of free space to run on Android 4.4 and higher.
According to the antivirus report, the app doesn't contain viruses or any kind of malware.
As users see it, you can get such a benefit of this application as a nice user interface.