Eight questions. Every one tells you why it matters, and the score is shown rather than hidden.
The verdict updates as you go. Nothing is sent anywhere.
This weighs the common factors. It is not legal or tax advice, and it cannot see your jurisdiction, your contracts or your history. Take the reasoning to an accountant rather than the verdict.
All nine boxes will be emptied on this device. There is no undo, and nothing is stored anywhere else.
Everything scattered across the site, in one download, kept current.
The three tools on this site ask for nothing and never will. This download is the exception, because it is the only thing here that has to be kept current: the benchmark is repriced every quarter, and a stale price is worse than none.