来 Google Play 网购吧！购买内容之后，立刻就可以在您的 Android 手机或平板电脑上享用，摆脱一切同步烦恼。
Sync My Mail app allows you to set the time(s) to download your new email from all GMAIL accounts set in your phone.
Main intention is to save battery life. You can disabled the automatic synchronization settings (which are constantly checking for new incoming email and lower your battery lifetime), and your mail will be checked at a user given time.