PerpYour worksheet stays with the browser
Calculator inputs are processed in the page. PerpFox does not request exchange credentials or connect to your trading account. Its market data is collected independently of your position.
Selected assets, watchlists and page-alert settings use browser storage. Session storage is the default. Choosing Remember on this device enables local persistence on that browser; it does not create an account or sync to another device. Both languages share the same saved contracts and stable rule identifiers.
Use the watchlist controls to remove items or disable persistent saving. Clearing this site's data in your browser removes its stored preferences. Downloads you have already exported remain wherever you saved them.
A public site still receives requests
Loading a page or reading the same-origin data service sends a normal web request. Hosting and delivery infrastructure may process IP addresses, request times, requested paths and browser headers. Operational logs are used for delivery, abuse controls and troubleshooting; this is not an anonymous offline application.
We use Google Analytics 4 to count visits and see which pages are used. It sets this site's cookies in your browser and sends Google the page address, referring page, device type and approximate location. Google signals and ad personalisation are turned off, and calculator inputs are not part of page addresses, so they are not sent. To opt out, block or clear this site's cookies or use your browser's tracking protection.
Links and voluntary messages
Following an external source or the disclosed Binance invitation link takes you to another operator. Its privacy terms apply there. Registration details should be submitted only on the exchange's own service, not by email to PerpFox.
If you contact us, the message includes the address and information you choose to send. Keep reports limited to the issue. For a privacy enquiry or a request concerning a message you sent, contact PerpFox; do not send additional identity documents unless a specific, appropriate verification need has been explained.