Samsung S Planner has stopped syncing with Windows 8 calendar

I have a Samsung phone and have been using s planner as my calendar app.  I also have a MS Surface Pro tablet and use the native calendar app on it.  These two calendars have always synced (in both directions) until recently.  Now there is no syncing in either direction.  The only changes that I can think of were an Android update (to version 4.4.2) and I also uninstalled an old version of the Outlook app on the phone (a new version had already been installed so had both on the phone for a while).

Is anyone aware of anything that might have changed to stop this from working?
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vanderfieldAuthor Commented:
Does anyone have any comments on this problem?
Scott Fell, EE MVEDeveloper & EE ModeratorCommented:
Have you looked at the playstore to make sure you have the latest version and that it is compatible or perhaps that app is no longer supported?

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RobOwner (Aidellio)Commented:
These two calendars have always synced
To what account?  I'm assuming your Microsoft one?

If so, then check your browser online  Create a calendar entry on your android and your surface pro and see which ones appear in your online calendar.
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