I am a newbie by using your GTD web app for my personal & work week planning as I have been done it by using Google Calendar since its inception. I synced all my more than 15 calendars with i.doit.im. I use each calendar as a sort of project or context, so for me your GTD app is what I was looking for. Also I am using your Android 4.0+ app.

I set on your Preferences > General Settings > Time Zone: Preferences > General Settings > Time Zone: to (GMT-6) Central America and when it synchronizes with Google Calendar, it moves all my calendars one hour earlier. A task schedule made for 08:00 on i.doit.im appears at 07:00 on Google Calendar.

Please advice asap for get your full version.