Nice application by Gmail to manage your email account.
I am using Android version of Gmail application .We can manage multiple Gmail account through this as it provides functionality to add multiple accounts.
Whenever new email comes pop up appears in mobile phone.
We can manage Google Calendar, attachment download through this application.
We can send email also throug this.
I have been using this application since 2014 and it helps me to manage my professional life to read and reply to client mails without opening gmail in browser every time.
Application user interface is so simple and light weight app.