The brand new Footnotes web App has been designed to work on many platforms, including tablet and desktop technology. Newly launched, you can sign up for free trial usage here. This allows you to save 2 grids at any one time.
If you enjoyed using this app then you can make a donation (minimum £10) to unlock your ability to save an unlimited amount of grids. All contributions will go towards helping us develop the app further, increasing functionality to make it even useful.