sumiplot is built for a laptop or desktop, at least 1,024 px wide. Your board is saved in this browser, so it will be here when you switch.
Shown in the header.
System follows your device and updates when it changes.
Rename, add or remove.
Rename the axes, rating and quarters.
Export a backup or load one.
Remove every item and start over from the welcome panel. Export first if you want a backup.
Rename, add or remove. Categories are listed A to Z. The two-letter code shows on each item. Removing a category moves its items to another one.