ZipPath

ZipPath is a calm number-path puzzle for Android. Start at 1 and draw one unbroken line through every number in order. The line must also cover every tile on the board. Drag back over your path to rewind and try another route. Boards start small and grow as you go, and later levels add blocked tiles that bend the route. The game generates its levels, and you travel through themed worlds such as Pond, Snow, Desert and Jungle. Hints help when you get stuck, and there is a Daily Pond puzzle too. Free on Google Play.