I also want a delay on sync frequency. I also use a lot of apps while journalling. For example: calendar, calculator, gallery, notes, dictionary, google maps. I use these apps simultaneously. It annoys me when Diarium pops up the sync window and temporarily blocks me from journalling every time i go back to the app. Yes, it blocks for a few seconds but it happens frequently.
I wish there was a delay. Like if a sync was recently done within the last 10 minutes, it won't sync again. That would lessen the interruptions.