Syncing depends on where you have assigned your data and what service you have setup on all devices.
On your Android, informant syncs to google calendar automatically, there is no setup for this within Informant. Look in your google/native calendar app on your android and make sure it matches the data in your google calendar online. Once that app looks good, then informant will show you the same data.
Then for any of the other services (informant sync, google task, or toodledo) go to informant settings>sync login and complete a sync. (you must first complete a sync with informant sync to unlock the app and have the option to sync to google task or toodledo). * you only need a single subscription to informant sync to use that account across all devices.
After that, you just need to assign your data to the service you want to sync to.
For example on Android informant just edit an event and go to the 'calendar' option, tap that to see a list of all your calendars with the icon of their sync service - G for google or blue cloud for informant sync. Or for task or note edit the item and look at the top of the entry for the sync service. Tap that area to see a list of all services available to choose from.
If you still have trouble, please contact support and let us know the sync service you are trying to sync to and we can focus on that.
Please also check our Youtube channel as we have some great tutorial videos there on syncing. https://www.youtube.com/channel/UCpU7aW58LSn6pqJ4PxWzdCw/videos