Kerfy Privacy Policy

Effective 2026-11-10

Kerfy is a construction calculator made by Pupik Studio. This policy is short because there isn't much to say.

What Kerfy collects

Nothing. Kerfy has no accounts, no servers, no analytics and no advertising. It does not connect to the internet to do its work, and nothing you type leaves your iPhone or iPad.

What Kerfy stores

On your device only:

• Your calculation history (the tape).
• The jobs and results you save.
• Your settings, such as the fraction precision and appearance.

Deleting the app deletes all of it. If you back up your iPhone or iPad, Apple includes this data in your backup like any other app's.

Purchases

Kerfy Plus is a one-time purchase sold through Apple's in-app purchase system. Apple handles payment and your billing details; Kerfy only receives a signed confirmation of the purchase. See Apple's privacy policy.

Sharing

When you share a result or a job, Kerfy hands the text to the iOS share sheet and you choose where it goes. Kerfy does not see or keep where you send it.

Children

Kerfy collects no data from anyone, including children.

Changes

If this policy changes, the new version will be posted at this address with a new date.

Contact

Pupik Studio — see pupik.studio for the support address.