Last updated: November 8, 2026
Summary: Fast Bitcoin sends some data to our servers and to RevenueCat, so that alerts work and your subscription stays active. The website and the iPhone, iPad, and Mac apps also send usage data to PostHog, so that we can make them better. We do not use advertising trackers. We do not collect wallet addresses or payment-card details. We do not sell your data.
Fast Bitcoin is a Bitcoin price app for the web, iPhone, iPad, Mac, Apple Watch, and Apple TV. This policy tells you which data the apps send, where the data goes, and why.
The apps make a random ID for your device and keep it in your iCloud account, so that your devices use the same ID. The ID does not contain your name, your email address, or your Apple Account. Our servers use the ID to keep your alerts and your notification settings.
Our servers run on Amazon Web Services in the United States. They keep this data with your device ID:
When you send feedback in the app, we receive your message and your device ID by email.
Sometimes the app asks how it works for you. Each step of that question sends one event: the step (for example, the question was shown, or you answered "Good"), the reason that the app asked, the platform, and the app version. These events do not include your device ID or another identifier, so we cannot link them to you, to your subscription, or to your contact details. We keep them for 400 days to count the answers.
The website fastbitcoin.app uses PostHog to learn how people use it. When you use the website, PostHog receives:
PostHog keeps a random ID in a cookie and in the local storage of your browser, so that it can count a visitor who comes back. The ID does not contain your name or your email address. PostHog keeps this data in the United States.
If your browser sends Do Not Track or Global Privacy Control, PostHog does not record your visit.
The iPhone, iPad, and Mac apps also send usage events to PostHog: when the app opens and closes, the screens that you open, the time range and the exchange that you choose, when you make, change, or delete an alert (the type of alert, not its price), and the result of a subscription purchase. Each event includes the app version, your operating system and device model, your access state (trial, subscribed, or not subscribed), and your IP address, which PostHog uses to find your approximate location. The apps use a random ID that PostHog makes for each install. This ID is not your device ID, and the apps do not link it to your alerts, your subscription, or your contact details. The apps do not record the screen. The Apple TV app and the Apple Watch app do not use PostHog. Refer to the PostHog privacy policy for its data practices.
Apple processes all payments. We do not receive your payment-card details or your Apple Account password.
The apps send your App Store transactions to RevenueCat, which counts the subscriptions for us. RevenueCat receives the transactions, your device ID as the customer ID, and technical details such as the app version and the operating system version. Refer to the RevenueCat privacy policy for its data practices.
Fast Bitcoin keeps your display preferences (for example, the selected exchanges, the font size, and the display settings) on your device. These preferences:
Fast Bitcoin gets price data from public cryptocurrency exchange APIs:
Price data comes directly from the exchange APIs or through our price servers. The apps also use these services:
Refer to the privacy policy of each service for its data practices.
Fast Bitcoin is not for children under 13.
We can change this privacy policy. We put each change on this page with a new date.
If you have a question about this privacy policy, send an email to: