ConvertALL Unit Converter vs UnitFlip

Why Ultimate Unit Converter? OFFLINE and LIFETIME Stop paying monthly subscriptions for simple tools. Ultimate Unit Converter is the premium, all-in-one solution for professionals, engineers, and everyday users—yours forever with a single, one-time purchase. No hidden fees, no recurring costs. All works offline. Designed for iPhone and iPad One of the most versatile and complete converter apps on the market. Ultimate Converter combines engineering precision, aviation-grade reliability, and everyday utility into one seamless experience. Whether you are an engineer analyzing fluid dynamics, a pilot calculating fuel loads, or a traveler shopping for clothes abroad, we have built the specialized tools you need. WHAT YOU CAN DO: Advanced Engineering Suite Go beyond basic units. We have expanded our library to support serious technical work. Handle complex fluid dynamics with dedicated Flow Rate, Viscosity, and Density tools. Tackle mechanical problems with precise Torque, Force, and Acceleration converters. For the tech-savvy, we provide essential Data Speed (Internet), Frequency, Current, and Radiation conversions needed for academic and professional projects. Professional Aviation Toolkit A specialized mode trusted by pilots and ground crew. Perform critical Volume/Weight conversions for JET A/A1, AVGAS, and Oil. Unlike standard apps, we give you the power to interactively adjust density (kg/L) factors, ensuring your calculations match real-world flight conditions perfectly. Global Shopping Companion Never guess your fit again. Our integrated sizing charts instantly convert sizes for Shoes, Tops, and Pants across US, EU, UK, JP, CN, and MEX standards. Perfect for online shopping or international travel. Everyday Essentials We haven't forgotten the basics. Access fast and reliable conversions for Length, Area, Temperature, Pressure, Power, Energy, and Time. Plus, utilize advanced mathematical tools for Angles and Number Systems (Binary, Hex, Decimal). Simplify your complex calculations. Download Ultimate Unit Converter today!

UnitFlip converts units instantly. Type a number, pick your units, and see the result live. No extra taps, no delays, no ads. Every conversion category is free, and the whole app is ad-free with no tracking. Built for travelers, students, cooks, and anyone who needs a fast, clean converter. ALL CATEGORIES, FREE - Length (meters, feet, inches, miles, and more) - Weight (kilograms, pounds, ounces, grams) - Temperature (Celsius, Fahrenheit, Kelvin) - Volume (liters, gallons, cups, milliliters) - Speed (km/h, mph, knots, m/s) - Time (seconds, minutes, hours, days, weeks) - Area (square meters, square feet, acres, hectares) - Digital Storage (bytes, KB, MB, GB, TB) - Cooking (cups, tablespoons, teaspoons, milliliters) - Currency (30 world currencies) - Fuel Economy (mpg, L/100km, km/L) - Pressure (psi, bar, atm, pascal) - Angle (degrees, radians, gradians) FEATURES - Live conversion as you type - Swap units with one tap - Save favorite conversion pairs - Adjustable decimal precision - Light, dark, and system appearance - Works offline (currency uses saved rates) - No ads, no tracking, no account required UNITFLIP PRO (one-time purchase) Upgrade once to unlock: - Live daily rates for 27 of the 30 currencies, with on-demand refresh (AED, SAR, and TWD use fixed reference rates) - Unlimited saved favorites Pay once, yours forever. No subscription. Questions or feedback? Reach us any time from Settings.