Number Caller Id and Tracker is a free Android app from Kantar TechApps that helps users identify unknown numbers offline by showing the caller's service provider name based on location, STD/ISD codes, city name, and state. The app also includes features for phone number location tracking, live phone address tracking, and finding nearby places such as food points, fuel stations, ATMs, hospitals, and stores.

With the Number Caller Id and Tracker app, users can easily locate their live phone address on a map using GPS service and save important details like latitude, longitude, title, address, and photos to mark any location. Additionally, the app provides information on bank IFSC codes, STD/ISD/PIN codes of all countries, and device and system information such as CPU, GPU, battery, screen, phone model, manufacture, Android versions, memory, sensors, and all the system info.

It's important to note that the app does not show the exact location or GPS location of the caller and does not present itself as a spying or secret surveillance solution. The location information provided is at the state or city level only. Users' sensitive data is not stored or transmitted and won't be misused at any cost. Overall, Number Caller Id and Tracker is a useful tool for identifying unknown numbers and finding nearby places.