Which app shows who is calling without an internet connection?

Question

Telephony

Which app shows who is calling without an internet connection?
and then why waste the battery)
free)

Answer 1

On iOS , any app that shows this kind of information does so without an internet connection.
The fact is that this is a security requirement so that application authors do not shoot who called you, how many times, at what time, etc. Therefore, Apple came up with the idea that the application should simply provide the system with a database with numbers, and the system itself shows it. At the same time, the application does not know who is calling when. With such a scheme, it makes no sense to check something on the Internet.

screenshot

How things are with the owners of Android - I do not know. But according to the mind, it should be the same.