# Knock Knock - Who's there — Contact integration management

> Intelligent contact and email management for business professionals. (iPhone/iPad app by Weway (Shenzhen) Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/knock-knock-whos-there/id1323376028 (this page in markdown: same URL + `.md`)
- Developer: [Weway (Shenzhen) Network Technology Co., Ltd.](https://appshunter.io/developer/971252989)
- Category: Productivity, Business
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 96 MB
- Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan)
- Released: 2018-05-11
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/knock-knock-whos-there/id1323376028/reviews.md

## What is Knock Knock?

【Knocknock】Help you to work efficiently and intelligently manage business cards, emails, and contacts.

Knocknock AI Address Book, an era-defining and life-changing app,was rewarded with “The Best App of the Year” prize by CIWEEK, 2018 Innovation Prize by Top Digital 2018, and is among the first South Korea’s officially recommended DApps on Kakao public Chain.

 “Traditional mobile address books are something we have for so long taken for granted. We become ignorant of how much trouble they can actually cause us and their inconvenience. Luckily, now we have Knocknock AI address book. It’s an absolute boon companion to businesspersons and will definitely boost business talks and daily communication. Perhaps we can say that Knocknock had redefined mobile address books.”                      --Sspai

For today’s business world, Knocknock is a truly all-encompassing, convenient digital address book.

What’s News：
· Add an identity phone call review process
· Email signature can customized by business card
· Support left and right sliding mode to switch to read mail
· Click on the avatar to launch a high-definition image

Contact management
· Support management of local contacts, corporate contacts, business cards, emails, WeChat, etc.

Business card intelligent recognition
· Automatically scan business cards, efficiently identify business card information, and liberate your business card holder.
· Support WeChat mini program "business card", open the WeChat contact with one click.
· Synchronize the business card information, never worry about the partner's work transfer or phone number change.

Intelligent dialing
· Support multiple contact search methods, you can find the person you are looking for within 3 seconds

Mailbox management
· Multi-mailbox, full support for existing mainstream mailboxes, perfect support for corporate email services.
· Email signature intelligent resolution, self-extracting contact identity information, try to call the email contact.
· Isolation and distribution of mail, bulk mass mailing becomes one-to-one single mail, mass mailing can also show respect.
· Quick reply, the phone only takes 1 second to process the email, and the reply can be revoked within 3 seconds.
· Support left and right sliding mode to switch to read emails, mail reading is smoother, improve mail processing speed.
· Support mail signature to mount custom business cards, send mail is to distribute business cards.

Security
· The key is self-sustaining, so that your email content will not be stolen.
· Personal private key authorized access, your contact information will not be read by third parties.

Any comments or suggestions can be told by [Settings] - [Feedback].

Feel free to contact us on Knocknock APP (Weibo) and Knocknock APP (Wechat Official).
Official Website：http://www.knocknockai.com

To renew your access to Knocknock, check out the following terms and policies:
Terms of Service https://www.knocknock.ai/static/legal_declaration.html
Privacy Policy https://www.knocknock.ai/static/privacy.html

## Key features

- AI business card recognition
- Contact and email management
- Intelligent dialing
- Customizable email signatures
- Bulk email distribution
- Secure private key access

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/knock-knock-whos-there/id1323376028/reviews.md

### 5/5 — 很好用！

*2018-11-14*

很好用，超級推薦的，名片和郵箱一體，很方便

## Frequently asked questions about Knock Knock

### What is Knock Knock?

Knock Knock is an intelligent address book designed to help business professionals manage contacts, business cards, and emails efficiently. It offers features like AI-powered business card scanning and streamlined email handling.

### Does Knock Knock have ads?

No, Knock Knock is ad-free, allowing for an uninterrupted user experience.

### What devices does Knock Knock support?

Knock Knock is available for iPhone and iPod devices.

### How often is Knock Knock updated?

The app was last updated on July 28, 2023, indicating regular maintenance and potential feature additions.

### What are the key features of Knock Knock?

Key features include AI business card recognition, comprehensive contact and email management, intelligent dialing, customizable email signatures, and secure private key access for data protection.

### Is Knock Knock suitable for personal use?

While designed for business professionals, Knock Knock's robust contact and email management features can also benefit individuals seeking better organization.

### How does Knock Knock ensure data security?

Knock Knock utilizes self-sustaining keys and personal private key authorization, ensuring that email content is not stolen and contact information is not read by third parties.

### What is the user rating for Knock Knock?

Knock Knock has a perfect rating of 5.0 stars based on one user review.

## Version history (last 5 releases)

### 2.0.0 — 2023-07-28

优化了产品体验

### 1.9.1 — 2021-08-10

1. Optimize data storage
2. Fix the display error of some users

### 1.9.0 — 2021-01-26

1. Optimize homepage search
2. Optimize the dial function
3. Fix the identity display

### 1.8.9 — 2021-01-06

1. Optimize the display of multi-language version
2. Optimize the display of homepage search
3. Fix the homepage avatar display

### 1.8.8 — 2020-12-31

1. Optimize the display of multi-language version
2. Optimize the delay problem that pops up on the user dial interface

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*