Progress tracker
Tick each domain as you cover it. Progress is weighted by how much of the real exam that domain carries, so the number tells you how much of the paper you can actually answer, not how many boxes you have ticked.
Everything is stored in your own browser. Nothing is uploaded, there is no account, and clearing your browser data clears your progress.
How to use it
Tick a domain when you could answer a scenario question about it without notes, not when you have finished reading about it. The weighting does the prioritizing for you: on the Developer exam, covering Applications and integration alone moves the bar by a third, while Claude Code moves it by three points.
The milestones come from the preparation guidance in the official exam guides. The one people skip is building something real, and it is the one that separates candidates who pass comfortably from candidates who find the scenarios unfamiliar.
When the bar is high and a mock exam agrees, book. Rescheduling is free until 24 hours before the appointment, so an early booking costs nothing and gives you a deadline.