App support

Questions

How do I restore my Pro purchase?

Open Settings in the app and tap Purchases → Restore Purchases, signed in with the same Apple ID you bought Pro with. Pro is a one-time purchase, so restoring on a new iPhone or iPad costs nothing.

How do I get a refund?

Purchases go through Apple, so refunds do too. Request one at reportaproblem.apple.com or from your purchase history in the App Store.

What does Pro include?

Pro removes all ads and lifts the limit on saved projects. The calculators themselves are free.

How do I change the tracking or ad consent I gave?

Tracking permission is in iOS Settings → Privacy & Security → Tracking. Declining keeps ads non-personalised; buying Pro removes ads entirely.

Will my saved projects move to a new phone?

Saved projects live only on the device. They move with an iCloud or computer backup restored to the new phone; the app has no account or cloud sync of its own.

How do I switch between feet and metres, or change the language?

Both are in the app's Settings: Units → Unit System, and Language. The language can follow the system setting or be chosen separately.

Does the app work offline?

Yes. Every calculation runs on the device. Only ads in the free version need a connection.

Why does the app give a different number from another calculator?

Different tools use different rules of thumb. The formulas this app and site use are listed on the About page, and each calculator page explains its method and how it compares with common local rules.