- Caller id:  That Helps you identify caller name by to find out who is calling you ;
- Block call:  block calls ;
- phone Number lookup:  lookup name associated with those phone numbers ;
- Name Lookup: Lookup number associated with those names ; 
- Caller ID app is free of charge But require internet connections.
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# All users  must grant needed permissions in order for caller id and call blocking to work properly .

# Profile deletion: You can delete your profile from My Profile view.

# subscriptions : you can manage the  subscriptions in one of the following ways:

1- On Android, open the Google Play Store, then tap Menu > Subscriptions.
2-On a computer, go to play.google.com, then in the left menu click My  
subscriptions.

On either Android or a computer, use the URL  
http://play.google.com/store/account/subscriptions to open the user's list  
of subscriptions.
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Please Note:
In comply with Google Play developer policy, below is an explanation of needed permissions.

Block call feature:
The caller ID or Block call will not work if you don't grant the below permission:
android.permission.CALL_PHONE
android.permission.READ_CALL_LOG (Android 9.0+)
- Caller ID: We will access calls information to perform search in our server and get the caller name
- Call Blocker: We will access calls information to perform block

Search feature:
-To be able to use the search feature, you need to grand the below permission:
android.permission.READ_PHONE_STATE

Chat feature:
-To be able to provide chat functionality with your contacts who have the app and are available to chat, you need to grant the below permission:
android.permission.READ_CONTACTS
- We will access your contacts frequently to check for new or updated users who you can chat with.

- the Device ID: In order to properly provide you the search feature, we identify your device by accessing the device id and generating a unique id.

- Below permission is needed to be able to keep caller id feature functional even after the mobile device is rebooted.
android.permission.RECEIVE_BOOT_COMPLETED

-Below permission is needed to be able to keep caller id and call blocker features functional even if the app was in background for long time.
android.permission.WAKE_LOCK

-Below permission is needed to be able to display the Caller Name info on your device screen when you receive a call
canDrawOverlays

Real Caller : Caller identification and phone number lookup.