I was doing a trial and not only can I not switch between portrait and landscape view, but it only allowed me to see and partially finish (49%) of a puzzle. In addition, it secured in place a puzzle piece that did NOT belong where it was and would not allow me to move it. I cannot easily find info on whether or not I’d be able to switch views and correct other issues with the paid version. Other puzzle apps are more user friendly and let you accomplish an entire puzzle before paying and point out which features are available with the paid version as you go.
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