Kubaj: Volume CalculatorKubaj: Volume Calculator Support
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Tell us what happened, which iPhone and iOS version you use, and include a screenshot if you can.
Frequently asked questions
Which formula should I use?
Smalian uses both end diameters, Huber uses the middle diameter, and Newton-Riecke uses both ends and the middle for higher accuracy. Use the method required by your local standard or buyer.
Can I use Kubaj without signal?
Yes. All calculations run on your device and work offline.
How do I move my data to a new phone?
There is no iCloud sync. Use the backup option to move your settings, customers, sales and prices. Saved measurements are not part of that backup, so export them as CSV or PDF reports if you need a copy.
How do I restore my subscription on a new or reset iPhone?
Sign in with the same Apple ID, open the app's Settings screen or the paywall and tap Restore Purchases. Your subscription comes back. Your app data does not, unless you restore a backup.
How do I cancel my subscription?
Open the iPhone Settings app, tap your name, then Subscriptions, and choose this app. Cancel at least 24 hours before renewal to avoid the next charge. Deleting the app does not cancel the subscription.
How do I contact support?
Email us at [email protected]. Include your iPhone model and iOS version if you are reporting a problem.
How do I ask for a refund?
Refunds are handled by Apple. Visit reportaproblem.apple.com, sign in and choose the purchase.