Speed Number Locator VPN is a free application developed by ILYAMMOS for Android users in the Utilities & Tools category. The app claims to provide mobile number information, STD code, and ISD code with its mobile number locator feature. It also promises to show caller information location with network details, allowing users to easily check who is calling.

The app includes a caller location feature that displays the caller's name, operator name, and location on the map for each call. However, it's worth noting that the app doesn't display the actual physical location of the caller. Additionally, the app doesn't upload any personal data such as user's contacts and location to the server, ensuring user privacy and security.

Overall, Speed Number Locator VPN seems like a useful app for those looking to identify unknown callers and get location details. However, it's important to keep in mind the limitations of the app's location feature.