Dedicated Inch-Fraction & Decimal Conversion Calculator

Despite the user building a web app for inch-fraction math, many woodworkers and tradespeople still prefer physical tools. There's a clear problem with cumbersome fraction calculations. A specialized physical calculator, designed specifically for inch-fraction arithmetic, with features like direct input for fractions, conversion between decimal/fraction/mm, and showing nearest fractions with error margins, would cater to this demographic. It would offer a convenient, robust solution for accurate measurements without relying on phones or complex scientific calculators.