What's New
- Interface update (Dark mode management).
App Description
learn concentration and directions
App Changes
- September 11, 2011 Initial release
- September 12, 2011 Price increase: FREE! -> $0.99
- June 06, 2013 New version 1.1
- June 15, 2013 New version 1.2
- June 14, 2019 New version 1.3
- September 16, 2023 New version 1.4