01
The Calculator stays free
Add, subtract, multiply, divide, and convert dimensions with stacked fractions and a full equation display. No ads.
iPhone & iPad · Offline · No account
Construction math that works where you do.
Span64 gives you exact feet-inch-fraction math, a persistent Tape, and focused jobsite Tools without ads or a learning curve.
Coming soon on the App Store
Free CalculatorSeven Pro ToolsOne-time purchase
CalculatorExact 1/64″
11′ 7 1/2″ + 2′ 4 5/8″
14′ 0 1/8″
Tape
11′ 7 1/2″ + 2′ 4 5/8″14′ 0 1/8″
Clear by design
Free math. Pro depth.
02
Span64 Pro is one purchase
Unlock all seven jobsite Tools forever. There is no subscription, trial countdown, or account to maintain.
03
Your numbers stay with you
Calculator entries, Tool inputs, results, and notes stay on your device. Optional telemetry is off by default.
Span64 Pro
Seven Tools. One unlock.
Preview each Tool with your own measurements before deciding. A single non-consumable purchase reveals the useful numeric results.
- 01Triangle / Right-angle
- 02Area & Volume
- 03Concrete
- 04Board Feet
- 05Stairs
- 06Roof / Rafter
- 07Studs / On-center
Built for the jobsite
No signal. No account. No subscription.
Span64 keeps the arithmetic precise and the product model simple.