Stack2One
Privacy Policy
The goal tracker stores the information you enter in your browser. Stack2One does not receive that tracker data through the application.
Effective date: September 13, 2026
Tracker data
Goals, starting holdings, and purchase entries are stored in localStorage on your device. The current application does not send this information to a Stack2One server or account. Clearing browser site data removes it. An exported backup is downloaded to your device and is your responsibility to protect. The browser requests a normalized public BTC/USD quote from Stack2One; the server retrieves it from Coinbase or Kraken without receiving calculator inputs. When you add or refresh a watch-only address, that public address is sent directly from your browser to mempool.space to validate it and retrieve its balance. Those providers receive standard request data under their own policies.
Information you send
If you email Stack2One, the message, address, and related metadata are handled by the email providers involved so the inquiry can be answered. Do not send wallet credentials or other sensitive financial information.
Technical logs
The hosting provider may process standard request information such as IP address, browser type, requested URL, timestamp, and security signals to deliver and protect the site. Retention and exact fields depend on the hosting configuration.
Cookies, analytics, and advertising
Stack2One requests Vercel Web Analytics on its production domain for aggregate visit measurement. No tracker balances, purchases, notes, or addresses are deliberately included in analytics events. This release uses an AdSense verification meta tag and ads.txt only; it does not load the advertising runtime or serve ads. Advertising will require published consent and opt-out controls and a policy update before activation.
Local storage
The tracker uses localStorage for its core function. The live-price system separately stores its mode, last custom price, and last validated public quote. These values are not used to follow activity across other websites. You can remove it using browser controls, but export a backup first if you want to retain the data.
Children's privacy
Stack2One is a general educational tool and is not directed to children. Do not submit personal information for a child through email.
Changes and questions
Material changes will be reflected on this page with a revised effective date. Questions can be sent to contact@stack2one.com.
Calculator inputs and price data
Calculator financial inputs stay in page memory and are not saved to tracker storage, put in URLs, or deliberately included in analytics events. The only saved price settings are the shared live/manual preference, most recent custom price, and last validated public quote; these use three isolated localStorage keys. Copy results includes entered financial values in your clipboard only when requested. Current-price controls call Stack2One's normalized endpoint without sending calculator inputs. Historical calculations request selected dates directly from Coinbase Exchange, which receives those dates and ordinary network information, but not your investment amount.