What is free in Span64?
The Calculator is free, with no ads. It includes exact feet-inch-fraction arithmetic, conversions, the equation display, and Calculator entries on your Tape.
Span64 Support
Practical help, without the runaround.
Span64 is an offline construction calculator for iPhone and iPad. There is no account to recover and no subscription to manage.
Email supportCommon questions
How Span64 works
What does Span64 Pro unlock?
A single non-consumable purchase unlocks all seven jobsite Tools: Triangle / Right-angle, Area & Volume, Concrete, Board Feet, Stairs, Roof / Rafter, and Studs / On-center. It is not a subscription.
How do I restore a previous purchase?
Open Settings or the Span64 Pro paywall and choose Restore Purchases. Use the same Apple Account that made the original purchase. If no matching purchase exists, Span64 will say “No previous purchase found.”
Does Span64 work offline?
Calculations, Tools, and the Tape work offline. Purchasing or restoring Span64 Pro requires a network connection so the App Store can verify ownership.
Where are my measurements stored?
Calculator entries, Tool inputs, results, and notes stay on your device. Span64 has no account system and does not sync your Tape to a server.
How does optional telemetry work?
Telemetry is off by default. If you explicitly enable it in Settings, Span64 may send limited anonymous usage and crash information. Measurements, Tape entries, and calculation results are never included.
Still stuck?
Tell us what happened.
Email roberto@irakai.com with your device model, iOS version, Span64 version, and the steps that led to the problem. Do not include private measurements you do not want to share.
Support is provided in English and Spanish.