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Fast offline toolbox with calculators, converters, QR tools and utilities.
OneTap is a lightweight everyday utility toolbox that brings calculators, converters, timers, date tools, number utilities, text tools, QR tools, random tools, and other handy utilities together in one app. Instead of installing multiple apps for simple everyday tasks, OneTap gives you quick access to a collection of practical mini tools from a single, organised interface. CALCULATORS & MATH * Calculator Perform everyday arithmetic calculations with calculation history and quick percentage operations. * Percentage Calculator Calculate percentages, discounts, tips, taxes, markups, and value changes. * Ratio Calculator Work with ratios, proportions, and proportional values. * Average & Statistics Calculate mean, median, sum, minimum, and maximum values from a set of numbers. TIME & CLOCK TOOLS * Countdown Timer Set quick or custom countdowns for cooking, workouts, study sessions, and everyday tasks. * Stopwatch Measure elapsed time with lap and split timing. * Event Countdown Create countdowns for birthdays, deadlines, events, holidays, and other important dates. DATE & CALENDAR TOOLS * Age Calculator Calculate age in years, months, and days and check the next birthday. * Date Difference Find the difference between two dates in days, weeks, and months. * Add or Subtract Days Calculate future or past dates by adding or subtracting a selected number of days. * Working Days Calculator Calculate business days between dates while excluding selected non-working days. UNIT CONVERTER Convert values across commonly used measurement categories, including: * Length * Weight and Mass * Temperature * Digital Storage * Speed * Area * Volume * Time * Pressure * And other commonly used units NUMBER TOOLS * Number Formatter Format large numbers using Indian notation such as Lakh and Crore or international formats such as Million and Billion. * Number to Words Convert numerical values into words for invoices, documents, cheques, and other uses. * Base Converter Convert numbers between Binary, Decimal, Octal, and Hexadecimal systems. TEXT TOOLS * Text Counter Count characters, words, lines, and estimate reading time. * Case Converter Convert text into UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case formats. QR & CODE TOOLS * QR Code Generator Create QR codes for text, website URLs, and Wi-Fi network information. RANDOM & DECISION TOOLS * Random Number Generator Generate individual or multiple random numbers within a selected range. * Random Choice Picker Enter multiple options and randomly select one. * Dice Roller Roll common dice including D4, D6, D8, D10, D12, and D20. * Coin Flipper Simulate a simple heads-or-tails coin flip. EVERYDAY UTILITIES * Tally Counter Count items using a custom step value and save counts where supported. * Image Color Picker Identify HEX, RGB, and HSL colour values from an image. * Colour Palette Generator Generate colour combinations and palettes for creative projects. * Password Generator Generate passwords using configurable length and character options. KEY FEATURES * Multiple everyday utilities in one app * Many core tools work offline * Simple and organised interface * Calculation and conversion history where supported * Quick access to frequently used tools * Copy and share supported results * Light, dark, and system theme options * Responsive interface designed for everyday use * No account required for core functionality WHO CAN USE ONETAP? OneTap can be useful for students, professionals, developers, home users, travellers, students, small businesses, and anyone who regularly needs quick calculations, conversions, QR tools, text utilities, or other everyday tools. From calculating a percentage and converting units to generating a QR code, formatting numbers, counting text, rolling dice, or creating a password, OneTap keeps practical mini tools within easy reach. OneTap brings useful everyday utilities together in one convenient toolbox.