KerfCalc — Support

Woodworking calculators for the weekend workshop

Need help, found a bug, or want a feature?
Email dql2888@gmail.com. It goes straight to the developer, and a reply usually takes a day or two.

If you are reporting something wrong with a calculation, a screenshot and the numbers you typed in are the fastest way to get it fixed.

Common questions

How do I type a fraction?
Type it the way you would say it. 1-3/4 is one and three quarters. The keypad has a – key for the whole-number part and a / key for the fraction, plus one-tap shortcuts for the common sixteenths and eighths. Whole numbers and bare fractions both work on their own: 4 and 3/4 are fine.
I bought the unlock but the paid tools are still locked.
Open any padlocked tool and tap Restore purchase. That re-checks with the App Store or Google Play using the account you bought it with — a different account on the same device will not find it. The unlock is a one-time purchase, so restoring never charges you again.
Does it work without a signal?
Yes. Every calculation runs on the device, and the app is built to work in a shed with no reception. The only thing that needs a connection is the initial purchase, and your unlock keeps working offline afterwards.
Why does a result sometimes show a ~?
Because that value cannot be marked exactly on a tape. The app rounds to the nearest 1/64" for display and tells you when it has had to, rather than showing a number that looks exact and is not.
Can I work in millimetres?
Yes — the Inches / Millimeters toggle at the top of the home screen switches the whole app, and it remembers your choice. Fraction entry stays available in either mode.
A 2x4 is not 2 by 4. Does the app know that?
It does. The board feet screen has one-tap buttons for common nominal sizes, and they fill in the actual dimensions — a 1x6 becomes 3/4" × 5-1/2".
Where does my data go?
Nowhere. Saved cut lists, your board inventory and your preferences live on your device and are never sent anywhere. There are no accounts, no analytics and no ads. See the privacy policy.
How do I delete everything?
Uninstall the app. All of it lives in the app's own storage, so removing the app removes the data with it.

Refunds

Purchases are handled by the store, not by us, so refunds go through them: reportaproblem.apple.com for the App Store, or Google Play's order history for Android. If something is wrong with the app, email first — it may be quicker to fix than to refund.

Contact

dql2888@gmail.com