Life Tools
Calculators, unit conversion, dates and random pickers for daily life
BMI CalculatorCalculate your Body Mass Index (BMI) from height and weight, graded by Chinese adult standards with a normal weight range. Fully local.Random Groups / Name PickerEnter a list to randomly split groups, pick a name, or draw items. Uses cryptographically secure randomness.Percentage / Discount CalculatorFind a percentage, calculate a ratio, measure change, or work out a discount price — four calculators in one, fully local.Kinship Term CalculatorType a relationship chain (e.g. "father's older brother") and get the correct Chinese kinship term.Online CalculatorAn online calculator with arithmetic, parentheses, powers and scientific functions (trig, logarithm, root). Fully local.Chinese CalendarA perpetual calendar with Gregorian and lunar dates, solar terms, festivals and zodiac. Click a date for details.Countdown / Stopwatch / PomodoroA countdown timer, stopwatch and Pomodoro timer with an alert sound. Runs fully locally.Fortune Wheel / Dice / DrawA lucky wheel, dice roller and fortune draw to help you decide when stuck. Fully local.Online TeleprompterPaste your script and it scrolls smoothly, with speed, font size, mirror and fullscreen.Handheld LED BannerTurn your phone into a glowing LED sign: full-screen scrolling text with adjustable speed, size and colours, plus mirror mode.Unit ConverterConvert between twelve categories of units — length, area, volume, mass, temperature, speed, time, data, pressure, energy, power and angle — with every result shown at once.Random Number GeneratorGenerate random integers in a range with count, uniqueness and sorting, using cryptographically secure randomness.RMB Capital ConverterConvert an amount to Chinese RMB capital form, plus Chinese numeral conversion. Fully local.