K-@ Mail Pro - email evolved apk v1.49 free download

Here is the only e-mail client on android-

K-@ MAIL PRO - EMAIL EVOLVED

SHORT DESCRIPTION- 
K-@ Mail Pro (Kat Mail Pro), the first and only email client for Android that combines a gorgeous graphical design with great user experience and the power of K-9 “under the hood”.

Genius Scan+ - PDF Scanner apk v1.3.4 free download

Here is an app which turns your android into pocket scanner-

GENIUS SCAN + - PDF SCANNER

SHORT DESCRIPTION- 
Genius Scan+ is a scanner in your pocket. It enables you to quickly scan documents on the go and email the scans as JPEG or PDF with multiple pages.

K-@ Mail Pro - email evolved apk v1.47 free download

Here is the only e-mail client on android-

K-@ MAIL PRO - EMAIL EVOLVED

SHORT DESCRIPTION- 
K-@ Mail Pro (Kat Mail Pro), the first and only email client for Android that combines a gorgeous graphical design with great user experience and the power of K-9 “under the hood”.