This Privacy Policy explains what information Book Trader ("the App," provided by AIDoingIt) collects and how it is used.
If you choose to enter your own Kalshi API Key ID and private key in Settings, that information is stored locally on your device (iOS UserDefaults / browser localStorage) and never leaves your device except as described here.
When you place, cancel, or close an order, or when the App loads your own positions and resting orders, your Key ID and private key are sent to our server over an encrypted HTTPS connection as two request headers (X-Kalshi-Key-Id and X-Kalshi-Private-Key) attached to that request only - never to requests that load public market data. Our server uses your key in memory to cryptographically sign that one request to Kalshi's API on your behalf, then discards it; we do not write your private key to disk, to a database, or to logs, and we do not retain a persistent copy of it on our servers. We do not sell, rent, share, or use your credentials for any purpose other than signing the order you directly initiated.
To display live prices, order books, positions, and trade history, the App communicates with our server, which in turn communicates with Kalshi's API. Your positions, balances, and order activity are read from your Kalshi account only to display them to you within the App. These read-only requests never include your API Key ID or private key - the key is attached only to the trading actions described above (place, cancel, close) and to loading your own positions and orders, never to a price refresh, chart load, or any other market-data request.
We do not collect advertising identifiers, do not run third-party analytics or ad SDKs, and do not sell personal data to third parties.
Your API credentials remain on your device until you clear them in Settings or delete the App. We do not retain a persistent copy of your private key on our servers.
The App relies on Kalshi, Inc.'s API to function. Your use of Kalshi is governed by Kalshi's own privacy policy and terms, separate from this one.
Questions about this policy can be directed to: support@aidoingit.com