OmniConvert is a powerful unit and currency converter focused on functionality, usability, and speed. It is completely free, supports a wide variety of conversion categories, and works offline. Exchange rates are updated in real-time (when connected to the internet) and all 166 major world currencies are supported. There are no conversion limits or size restrictions, and it even comes with a dark mode!
OmniConvert offers an additional selection of useful calculators (e.g. salary, gratuity, baking) along with compilations of common scientific constants relevant to fields like physics and chemistry.
Conversions:
Currency, Volume, Mass, Temperature, Time, Length, Speed, Gas, Area, Energy, Pressure, Torque, Data
Calculators:
Baking, Salary, Tip, Percentage
Constants:
Chemistry, Physics, Density, Unit Prefix
Omniconvert is optimized for iPhone X, 11, 12, 13, 14, and 15, as well as the Pro and Max variants of these devices.