Not very good
The app lets you pick up and see the top card from any position on the clock, not just the King slot (at the beginning) or the position of the card you just drew. This seems to make winning any game rather trivial, unlike any version of clock solitaire I've ever played. And finally, you can only see the card if you're actively touching it, making it hard to see what's behind your finger. Would not recommend this app.
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