Thank for help but warning third party application.
do not worry
imtoken is an application for a lot of people trust and use
I think it better security myetherwallet
do worry!
MyEtherWallet is an open source wallet which you can go to github and download the source code and see it for yourself, and it is easily trusted for that reason.
this application is a closed source wallet which you do not know what it is doing in the background and it is from China. not exactly what you call "trusted".