Google recently announced the App “Inbox” which is rolled out on invite only basis.
I requested an invite and received the invite and went ahead and try out this. While trying out I realized the IOS Native mail app is crashing in all my iOS device even though I installed only in the iPad.
It seems, the Google Inbox trying to change some settings in the email server which affects the other mail app when try to fetch the emails from that account. After a while when I opened the mail app on my iPhone I don’t see any of the emails in my account. It’s dated back to 2013 emails.
Informed to Google Inbox Team @InboxGoogle via twitter. Still awaiting for there response. But I can still see those emails from the web interface of Gmail.
Not sure this is a known bug. I recommend if you want to try out the Inbox, please use some dummy account .