Support

What's included in the free version?

The Slab calculator is completely free with no limits. Calculate concrete volume, bag counts, cost estimates, and truck loads for slabs, patios, and driveways at no cost.

What does ConcreteCalc Pro include?

Pro unlocks all 8 calculators (Slab, Round Slab, Footing, Column, Wall, Stairs, Rebar, Blocks/CMU), plus job saving with photos, professional PDF estimates with company branding, home screen widget, and Siri shortcuts.

How do I manage or cancel my subscription?

Open your device Settings > tap your name (Apple ID) > Subscriptions > ConcreteCalc Pro. From there you can change your plan or cancel. Your Pro features remain active until the end of your current billing period.

How do I restore my purchase on a new device?

Open ConcreteCalc Pro > tap the Pro badge or go to Settings > tap "Restore Purchases". Make sure you're signed in with the same Apple ID used for the original purchase.

How accurate are the calculations?

Calculations use industry-standard formulas and bag yield data from Quikrete TDS No. 1101. Building code references follow IRC R311.7, ACI 318-19, and NCMA TEK standards. Always verify calculations independently and add a waste factor (we recommend 10%) for real-world conditions.

Is my data private?

Yes. All your data (calculations, saved jobs, photos, company info) stays on your device. We don't have servers, accounts, or analytics. Nothing ever leaves your phone. See our Privacy Policy for details.

How do I request a refund?

Refunds are processed by Apple. Visit reportaproblem.apple.com, sign in with your Apple ID, find ConcreteCalc Pro, and select "Request a Refund".