Email lokman782782@gmail.com. Please include your iPhone or iPad model, iOS version and the exact values and units you entered.
What is Horizontal Run?
The level distance measured horizontally, not the length along the slope. RiseSpan shows the sloped length separately as Slope length.
How do I enter feet and inches?
Type values such as 2' 3", 2ft 3-1/2in or 2 1/4". A leading minus applies to the whole value, for example -(2ft 3in). Under each field, "Read as" shows how your entry was understood.
Why is the grade "Undefined"?
With a Horizontal Run of 0 the slope is vertical (±90°) and a percentage can't be calculated.
Why does the diagram say "Not to scale"?
Very shallow or very steep slopes are exaggerated so the triangle stays readable.
Does RiseSpan check building or accessibility codes?
No. It is a geometry calculator only and doesn't measure anything with the phone's camera or sensors.
How do I restore RiseSpan Pro?
Open Settings & Help in the app and tap Restore Purchases while signed in with the Apple Account used for the purchase.
Where is my data?
Only on your device. See the Privacy Policy.