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Frequently Asked Questions
Is TB Logic free to try?
Try the Plain mode calculator for free — running tape, history, and deep-link sharing. Pro unlocks exact feet-inch-fraction math, Construction mode, trade formulas, and the AI assistant for $5.99/month or $65.99/year, with a 30-day free trial.
What calculator modes are available?
Try Plain mode for free. Construction mode — built for framers and concrete crews, with formulas covering studs, rake and arch walls, stairs, rafters, roofing, concrete volume, and more — is included with Pro.
How does the AI assistant work?
The AI assistant is a Pro feature powered by Anthropic's Claude. Ask it questions in plain English — like 'How many studs for a 20-foot wall on 16-inch centers?' — and it walks you through the answer step by step with framing context.
What data does the AI use?
The AI only processes what you explicitly send to it. We do not share your calculation history or usage data with AI providers. See our Privacy Policy for full details.
How do I share a calculation?
Tap the share icon on any result. It generates a deep link that opens the exact calculation in TB Logic on iOS or Android.
What languages does TB Logic support?
The app runs in 8 languages. Open Settings in the app to switch — menus, buttons, and labels update across Plain and Construction modes. No extra download required.
How do I cancel my Pro subscription?
You keep Pro access until the end of your billing period after cancelling. iPhone/iPad: Settings → Apple ID → Subscriptions → TB Logic. Android: Google Play → Profile → Payments & subscriptions → Subscriptions → TB Logic.
I found a bug or the app crashed. What should I do?
Email us at support@toolbeltlogic.com with a description of what happened and your device type and OS version (iOS or Android). We try to respond within 24 hours.
Is TB Logic available on Android?
Yes — TB Logic is available on both iOS (App Store) and Android (Google Play). Try the Plain mode calculator for free on either platform.