317 microapps.
One trip.

Concrete Calculator

Concrete needed for slabs, footings, columns, and stairs — in cubic yards, cubic metres, and bag count

Binary Decoder

Decode binary code (8-bit ASCII bytes) into readable text — accepts spaces, commas, or no separators

Sunrise/Sunset Calculator

Sunrise and sunset times for any date and location — uses the NOAA algorithm

Moon Phase Calculator

Find the moon phase for any date — illumination percent, days into the cycle, and next new/full moon

Minecraft Circle Generator

Generate pixel circles for Minecraft towers, walls, and floors — diameters 1 to 64

Long Division Calculator

Divide step-by-step with the algorithm you learned in school — quotient, remainder, and every intermediate step

Height Predictor

Predict a child's adult height from parental heights using the mid-parental (Tanner) method

Millionaire Calculator

How long until you hit $1M (or any target) given starting balance, monthly contributions, and rate of return

Dog Age Calculator

Convert dog years to human years using the modern AVMA formula — size-adjusted, not the '× 7' myth

Due Date Calculator

Pregnancy due date from last period, conception, or IVF transfer — plus current week and trimester

Ovulation Calculator

Find your ovulation date, fertile window, and peak conception days for the next 3 cycles

Period Calculator

Predict your next 4 periods plus ovulation and fertile window from your last period date and cycle length

Tablespoon to Grams Converter

Convert tbsp to grams (and back) for flour, sugar, butter, salt, honey, oil, and 15+ kitchen staples

Standard Deviation Calculator

Sample and population SD plus mean, median, variance, min/max — paste any list of numbers

Surface Area Calculator

Surface area of cube, box, cylinder, sphere, cone, or pyramid — total and lateral

Volume Calculator

Volume of cube, rectangular box, cylinder, sphere, cone, or pyramid — one tool

Logarithm Calculator

ln (natural), log₁₀, log₂, or any custom base — answers 'what power gives me this number?'

Combination Calculator

C(n, k) = n! / (k! × (n−k)!) — selections where order does not matter

Permutation Calculator

P(n, k) = n! / (n−k)! — arrangements where order matters

Annual Income Calculator

Convert any pay rate (hourly, weekly, monthly) to annual — and back to every other interval

Sales Tax Calculator

Add tax to a price or extract tax from a total — US state presets included

Weeks Left in the Year Calculator

Auto-counts weeks remaining in the current year — plus days, day-of-year, and percent done

Square Footage Calculator

Add up rooms in ft, in, m, or cm — totals shown in sq ft and m²

Mg to Ml Converter

Convert milligrams to millilitres (and back) — for water, oils, alcohol, and medications

Factorial Calculator

Compute n! exactly for n up to 170, scientific notation up to n = 1000

Rectangle Area Calculator

Area, perimeter, and diagonal from length and width

Volume of a Cone Calculator

Cone volume from radius and height — plus slant height and surface area

Volume of a Sphere Calculator

Sphere volume from radius or diameter — plus surface area and great-circle circumference

Volume of a Cube Calculator

Volume from one side length — plus surface area, face & space diagonals

Slope Calculator

Find the slope between two points — plus equation, angle, distance, and midpoint