Docs

What this is built on, and how it behaves.

Two sets of documents. The principles argue a position about money and state their numbers honestly, including the ones that soften the argument. The guides describe how each part of the app behaves, what it refuses to do, and where its figures stop being certain.

The principles

Read in order they make one argument. Read alone each one still stands, and each one names what it costs you as well as what it claims.

The app guides

Written against the product rather than around it, because a tool that measures your money should be legible before you trust it with anything.

The models these principles produce are published in full, identical for every visitor, each with its own worst year printed on it.

Read the published models