New! Check Button gives you the option to remove incorrect paths.

This update from Apple will improve the functionality of this app. No new features are included.

New! Check Button gives you the option to remove incorrect paths.
Updated for iPhone X and iOS 11

Universal - play on any iPhone or iPad
Added support for iOS 10.
Added support for iCloud, Game Center.
New setting allows player to select one of 3 coloring schemes for number rings.
Improved drawing speed and clarity.

Added 20 new, extra-large puzzles, bringing total puzzle count to 189.
Support for iOS 8!
Support for iPhone 5, 6, 6+

Changes: zippier play, sound effects added.

Improved support for iOS4.x

Added: Advanced Levels section with 25 new, challenging puzzles.