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Answers and rating deltas for

how to detect whether user had installed this app before

Author Votes Δ
Juan Catalan 1 +2.92
Andrea 1 +0.63
Lajos Arpad 0 -0.22
George 0 -0.95
dpizzuto 0 -1.14
Sandeep Agrawal -2 -4.13
Last visited: Nov 13, 2015, 5:25:21 PM