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A simple and convenient unit convert with constant lists. Get conversions for all units simultaneously, and use entire display height to show information. Features (some applicable to full 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. Spectroscopy units are also included other than commonly used units, enable the conversion between wavelength, wavenumber, photon energy, and light frequency. If you find any bugs/issues, or have any suggestions, please feel free to tell me in your comments or email to the support: email@example.com Your comments are pre will be seriously considered in future updates.