Purchase model
Span64 costs $19.99 once. The Calculator is free, Span64 Pro unlocks the seven Tools forever, and nothing about the app expires or renews.
Straight answers
A construction calculator is a tool, not a service. It does the same arithmetic on the same device whether you bought it today or three years ago, so there is nothing to bill you monthly for. Span64 has no servers to run and no account to maintain, and the price reflects that.
The Calculator is free forever and has no ads: exact feet-inch-fraction arithmetic, multiplication and division, conversions, a full equation display, and Calculator entries on your Tape. You can also preview every Tool with your own measurements before deciding.
One purchase of $19.99 unlocks all seven jobsite Tools for good: Triangle / Right-angle, Area & Volume, Concrete, Board Feet, Stairs, Roof / Rafter, and Studs / On-center. There is no trial countdown, no tier above it, and no feature that later moves behind a second payment.
Span64 Pro is a non-consumable App Store purchase tied to your Apple Account. On a new device, open Settings or the Span64 Pro paywall and choose Restore Purchases with the same Apple Account. Restoring needs a network connection so the App Store can verify ownership; everything else works offline.
No. Measurements, Tool inputs, results and notes stay on your device. There is no account, no sync and no ad network. Optional anonymous telemetry is off by default and never includes what you measured.
Need a hand?
If a restore does not find your purchase, or the unlock did not appear after paying, the support page lists the steps and the address to write to. Try the free web calculators first if you want to see the math before buying anything.
Refunds are handled by Apple through your App Store purchase history.