BubbleDo is a Google Calendar client with additional todo lists functionality with intuitive and friendly user interface.
The common differences from other clients are
1) In todo functionality which makes able you to manage deals by groups, priority in views like bubbles. In this case your deals also may be mapped to Google calendars events and groups are mapped to Google calendars.
2) In ability to represent many parallel events in like Microsoft Outlook style. It may be useful when your work with many calendars at the moment.
It also supports two way offline syncing for calendars and events. Any changes made by client make updates in Google calendar as soon as you go online. Google calendar changes are synced by timeout that can be set from settings.
It supports list, day, week and month calendar represents.
IT DOESNT SUPPORT TWO-STEP GOOGLE VERIFICATION!!!