How to type superscripts and subscripts on your iPhone / iPad without a special keyboard.
It is possible to use iOS's built in Text Replacement to type superscripts and subscripts natively on an iPhone or iPad with a combination of regular keystrokes. Additionally other symbols can be typed in this way.
Link to a page of common and useful symbols along with the shortcuts that I use: https://nadnosliw.wordpress.co....m/unicode-characters
Link to my blog about Text Replacement for science and math notation: https://nadnosliw.wordpress.co....m/2015/04/16/type-sc