All In One Calculator replaces a folder full of apps with a single, thoughtfully designed toolkit — finance, health, math, converters, dates and more. Works offline. Tracks nothing.
Each tool is purpose-built and tuned for one-hand use. No ads mid-calculation. No paywalled basics.
EMI, loans, SIP, compound interest, ROI, GST, VAT, discounts, mortgages, savings goals and more.
BMI, BMR, body fat, calories, macros, water intake, heart-rate zones, ideal weight, pregnancy dates.
Scientific engine, equations, fractions, matrices, GCF/LCM, primes, logarithms, statistics.
Length, mass, temperature, speed, pressure, energy, data, area, volume, power — every SI and imperial unit.
Age, date difference, countdowns, working days, time zones, week numbers, anniversaries.
Ohm's law, resistor codes, molar mass, physics kinematics, torque, density, wavelength.
Concrete, brick, tile, paint coverage, roofing, flooring, stair rise-run, board feet.
Tip splitting, fuel cost, mileage, shopping discounts, cooking measures, electricity bills.
Business, education, geometry, probability, crypto, tax and dozens of specialist calculators.
Every tool runs on your device. Airplane mode, basement, mountain trail — results in milliseconds.
Your numbers never leave your phone. No accounts, no analytics on your calculations, no data resale. Ever.
Thumb-reach layouts, smart history and swipe navigation refined across thousands of usability sessions.
A clean light mode and a true-black dark mode that follow your system — easy on the eyes at any hour.
Pin the tools you use daily and revisit any past calculation. Your workspace, arranged your way.
Localized number formats, currencies and units for 150+ regions. It speaks your math, wherever you are.
Download All In One Calculator and delete a dozen single-purpose apps today.