Knocknock refines the traditional system address list, intelli-
gently manages business card, mailbox and contact person
of the address book, creating a truly easy-to-use all-round
address list to help users realize efficient mobile office.
Knocknock, which adopts the new UI, has a further experi-
ence upgrading in vision and operate.

New UI updating, smoother operation experience.
Newly increased cool black mode, upgrade visual
experience, extend the battery life of the mobile
phone, using it at night to protect your eyes, and
feel the dark that pleasing to the eye together.

The digital identity DApp recommended by the first
wave of Kakao public chain in South Korea can be
synchronized to the blockchain for security backup.
Multiple encryption technology ensures that the
identity and address book data are completely
controlled by individuals, and can only be accessed
through the authorization of personal private key,
so as to realize the private security and indepen-
dent control of identity data.

T9 keyboard assisted search, input several numbers, and easily
complete all-round search of local, enterprise, email and wechat
contacts in Knocknock.

Comprehensively surpassing the traditional OCR tech-
nology, learning and processing the identity background
information of business card independently, realizing the
technological leap from “identification” to “understand-
ing”.

Examine the contact’s history track, and the change
of personal information can be seen at a glance in
Knocknock’ s address book.

It supports one key for copying of important per-
sonal information such as name, phone, company,
address, etc. text information is more convenient
to copy and paste.

We are not only concerned about your experi-
ence, but also about your address list security
and privacy protection. One more backup, one
more reassurance.

With a powerful email signature resolution engine,
the received email signature can be saved as a
more portable contact card.

Use emoticons to reply email quickly, making communication
more efficient.

You can choose to cancel sending within
3 seconds after sending the email, so as
to avoid the mistake of sending the email
accidentally after saying the wrong words
or typing the wrong words.

Mass mailing recipients: don’t see other recipients.
The distribution mode can be selected for mass
mailing, and the other party will receive the inde-
pendent mails separately displaying the recipients,
without the feeling of receiving mass mailing.

Set the carefully prepared business card as the
email signature, and every email sent can be turned
into a personal business card.

E-mails of the same contact are displayed separately in
the form of dialogue, which makes e-mail communica-
tion more intuitive and simple.

Support a variety of domain name email,
gesture operation to process email quickly,
free you from the massive mailbox informa-
tion.