Does not synch well between devises

I purchased Planner Plus because I liked the layout, which was very similar to FC products. I purchsed a download for both my iphone and Mac Airbook, hoping to be able to keep calendars synched with a product whose layout I liked. I had a TERRIBLE time getting the Planner Plus to synch between both devises. Some functions were suppose to synch via the iCloud, other functions were suppose to synch with DropBox. I did not feel like they worked properly.
I contacted customer support about a different issue and they responsed within 48 hours. However, when I sent a second email, asking about the synching issue, I never did get a response.
I would use this product, if I felt like the synch process worked properly, but currently, I do not trust that it does - that means missed appointments and errors. If I was only using it on one devise, it might be OK

hmtsmith about Planner Plus - Daily Schedule, Task Manager & Personal Organizer