Google Calendar is a great online GTD tool and one of the web services I use a lot on a daily basis. However, as GTD, of course, I want to be able to achieve mobile phone synchronization, which can make GTD more effective. CalsynS60 also introduced a synchronization tool that can synchronize mobile phone Calendar and Google Calendar before, but the use experience is not very good. Google has also released its own Google service Sync tool, Google Sync, but the S60 phone can only sync contacts to Google contacts. I have been looking for a suitable Google Calendar synchronization tool. Today, I used GooSync, and finally found the Google Calendar synchronization tool on the S60 mobile phone. I feel very good after using it, and recommend it to everyone.