Privacy Policy
Last updated: 2026-07-03
Short version: we don’t collect your personal data. DuctSizer runs 100% offline · no account · no analytics.
What we store
Your sizing inputs, saved jobs, and settings are stored locally on your device only. Nothing is uploaded to a server, and we don’t operate any backend that could receive it.
No account, no tracking
There is no sign-up or login. DuctSizer does not run advertising or third-party tracking or analytics SDKs inside the app, and we do not sell data — because we never collect any.
Purchases
The Pro unlock (one-time purchase, no subscription) is processed by Apple and managed via RevenueCat to verify your unlock. RevenueCat receives only the information needed to validate a purchase (an anonymous device/purchase identifier) — never your name, contact details, or usage data from us. This mirrors what DuctSizer discloses in its App Store “App Privacy” section.
Data shared with third parties
Other than the purchase-verification exchange with Apple and RevenueCat described above, DuctSizer does not share any data with third parties, because none is collected.
Changes to this policy
If this policy changes, we’ll update this page and the “Last updated” date above.
Questions
Email hello@alicanbasak.com.
Independent HVAC duct sizing tool. Not affiliated with or endorsed by ASHRAE, ACCA, or Trane.