This is the worst caller ID app I have seen till today. When installing it demands you permission like your contacts & your bank information. If you deny those permissions then you are not allowed to use the app. It has been also proved from the reports that it secretly steals our data & sells it. I got to know about it when like whenever I do any payment from my mobile then it sends me a notification of money deducted & current balance in my account. Also this is not required for caller ID app to access bank Information. Whenever I got a missed call it just annoys like by sending notification of missed call even when I have seen that & if you try to turn off the notification permission then this will not show yo caller ID when someone calls you.