I have used this app and this app just work like a truecaller. Through this app you will get to know the name( not always) and location of the person using that phone number. The location entirely depends upon from where the sim has been bought. I would like to tell you about this app as below-
Concept-The concept of the app is to track the location of the mobile number be it known or unknown. The app provides us with STD and ISD codes which can come in handy anytime.
Layout and design-The layout and design of the app is not good at all. More than half of the screen is filled with ads and is very disturbing. They could have developed a more attractive interface.
Features and functions-The features and functions provided by the app is same like truecaller app. They have just come up with the STD amd ISD manual otherwise everything is similar.
Usefulness-The app will never tell you the exact current location of the phone number. Instead it will just tell you the details of the mobile number which everyone registers during buying new sim.
Conclusion-I would suggest everyone to use more reliable app like truecaller.