Plot Log
Keep score across problems
A Plot Log is private and needs no account and no email: it lives at a link only you have. It shows each skill's attempts, how many were right, your last ten, and which skill to practise next.
This browser remembers a Plot Log: open it.
Or check any problem and press start a private Plot Log with this attempt. Free logs hold 100 attempts; with the Plot Pass, 5,000 and a CSV export. Plot Pass $1.95/month or $19.50/year · Free during preview.