Kalk: Plain Text Calculator

Kalk is a calculator you write in like a notes app. Type words and numbers together, the way you'd jot something down: "Rent 1 200 + utilities 180", "Coffee 4.50 × 20 workdays", "100 EUR in USD". Every line with a calculation shows its answer on the right, as you type. No keypad, no equals button, no lost history: the whole calculation stays readable and editable. WRITE THE WAY YOU THINK • Words around numbers are simply ignored, so notes and math share a line • Headings with #, comments with // • Big numbers the easy way: 1 250 000, 45k, 2.5M, 1bn • Decimal point or comma, whichever you're used to MATH, PERCENT, UNITS • Brackets, powers, negative numbers • Percentages the way people say them: 100 + 15%, 20% of 80, Price − 10% • Convert length, weight, volume, speed, temperature, time and data: 6 ft in cm, 180 lb in kg, 38 °C in °F CURRENCIES AND CRYPTO • Live exchange rates for world…