FillBook Reviews — Discover what people think of this product.

Most Kalshi traders can tell you their best trade off the top of their head. Almost none can tell you their real win rate by category with fees folded in.

FillBook fixes that. Paste a read-only Kalshi API key and it pulls in your fills, groups them into positions, and shows you what actually makes you money: real P&L with fees included and correct settlement to $1/$0, win rate and average win/loss by category (politics, sports, econ, weather, crypto), and edge decay by holding duration. Every position takes notes and tags, so it works as a real journal, not just a dashboard. CSV import is there too.

Read-only from day one, so it can never place orders. Free plan keeps unlimited trades with a 60-day analytics window; Pro ($15/mo) unlocks your full history. Built in public by a solo maker. Feedback very welcome.