Ultrya Design

Building simple, useful tools

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Independent developer & maker, building free calculator and conversion apps for everyday use — CalculatorHex, FamilyCalculator, and more coming.Independent developer & maker, building free calculator and conversion apps for everyday use — CalculatorHex, FamilyCalculator, and more coming.

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Gone streaking

Maker History

CalculatorHexHex, binary & color conversion — no Googling required
Sep 2026

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Joined Product HuntAugust 3rd, 2026

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1d ago

CalculatorHex - Hex, binary & color conversion — no Googling required

CalculatorHex is a free toolbox built for developers tired of Googling the same conversions. Hex to decimal, hex to binary, hex to RGB, ASCII to hex, and 30+ more calculators — all in one clean, fast app. No sign-up, no clutter, no ads in your way. Just open it, convert, done. Built by a small team frustrated with re-searching hex-to-color conversions for the hundredth time. Free on iOS and Android.