units & Constants Free app for iPhone and iPad

A simple and convenient unit convert with constant lists. Get conversions for all units simultaneously, and use entire display height to show information.

Features (not all units / constants will show in this free version):

• Constant lists including physical, chemical and nature constants.

• Convert simultaneously all units of the same type.

• Use the entire height of ipad display to show units.

• Pop-up number keyboard only shows up when needed.

• Both portrait and landscape modes are supported.

• Spectroscopy units are also included other than commonly used units, enable the conversion between wavelength, wavenumber, photon energy, and light frequency (available after purchase).