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Knock Knock - Identify HK popular phone numbers

By 7th Playground

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Knock Knock Caller helps you to identify the caller before answering a cold call. Our database contains over 15,000 HK popular numbers and keep updating. Including banks, financial advisers, beauty centers, fitness centers, delivery service providers, telecoms, insurance companies, etc.

You install and run the App once, iPhone would automatically download our database regularly. So you would always receive the latest numbers in a fully automatic way.

There is no Ad in this App, 1-click Complete, Auto Update.

How it works:
Knock Knock Caller uses iPhone "Background App Refresh" technology. It downloads the latest database automatically when the iPhone is ready.
Database is then imported into your contact lists, when someone calling, his/her identity can be shown.

Due to the iPhone App restriction, Knock Knock Caller would not decline phone calls. You can still choose to accept or decline.
We use the database of

What's New in Version 1.2

* Use https
* Faster download

iPhone Screenshots

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Knock Knock - Identify HK popular phone numbers
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  • $3.99
  • Category: Utilities
  • Updated:
  • Version: 1.2
  • Size: 1.5 MB
  • Languages: English, Traditional Chinese
  • Seller:

Compatibility: Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

We have not received enough ratings to display an average for the current version of this application.