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This app is perfect at solving but the $2 for puzzles above 8x8 is kinda too much, at least raise it to 10x10 before you charge
Not enough ratings yet to assess Hashi Solver.
Hashi Solver appears to be a legitimate app. AppsHunter Legitimacy Score for Hashi Solver is 80/100.
Based on 80 of 100 points across 7 verification signals from App Store and developer data.