Simon Tatham's Puzzles (free, zero ads) mobile app: https://apps.apple.com/us/app/simon-tathams-puzzles/id622220631 https://apps.apple.com/us/app/simon-tathams-

Simon Tatham's Puzzles (free, zero ads) mobile app: https://apps.apple.com/us/app/simon-tathams-puzzles/id622220631 https://apps.apple.com/us/app/simon-tathams-puzzles/id622220... Also on other platforms. A dangerous time-sink. Take care if you love puzzle games but don't have much free time! Especially when you start to use the custom puzzle sizes for more challenging games!