Stack: Firewood & BTU Calc — Privacy Policy

The short version

Stack does not collect, store, or transmit any personal data. Everything you enter stays on your device.

What we collect

Nothing. The app has no user accounts, no analytics, no advertising SDKs, and no third-party trackers. We do not collect your name, email, location, device identifiers, or usage data.

What we store on your device

The app saves your preferences and entries (units, your saved wood stacks, and moisture-meter readings) locally on your device using the system preferences store. This data:

• Stays on your device only
• Is not transmitted anywhere
• Is removed if you delete the app

In-app purchases

Stack offers a one-time Stack Pro purchase ($6.99) that unlocks the seasoning tracker, winter planner, wood-vs-other-fuels comparison, and per-species value pricing; the cord & stack calculator, the species BTU chart, and the Burn Safe reference are free. Purchases are processed by Apple through StoreKit. We do not see your Apple ID, payment method, or billing information — Apple handles all of that under their own privacy policy. The app only learns whether a successful purchase is associated with the active Apple ID on this device.

What we share

Nothing. We have nothing to share because we collect nothing.

Third-party services

None. Stack does not integrate with or send data to any third-party services, including analytics, advertising, crash reporting, or AI providers.

Network access

The app does not require an internet connection to function. The only network calls it can make are to Apple's StoreKit servers (to fetch the unlock price or restore a prior purchase). No other network requests are made.

Children's privacy

Stack is not directed at children. We do not knowingly collect information from anyone, including children, because we collect nothing.

Your rights

Since no personal data is collected or stored off your device, there is nothing for us to access, correct, or delete on your behalf. To remove all locally stored app data, delete the app from your device.

Changes to this policy

If the app changes in a way that affects this policy, we will update this page and revise the effective date above.

Contact

Questions about this policy? Email roman.kopaliani@gmail.com.