Yes, apparently they have wasted their lives. There is clearly disagreement on the use of one or two spaces, and no one has ever complained about being unable to read a paragraph because of an extra space, or lack thereof, at the end of the sentences. They need to stop being so controlling. Language, grammar, typography, typesetting — all these things change over time, and that’s a good thing. All these control freaks that try say there’s only one proper way to do express yourself (like the author of this app) only stifle expression. I agree rules have to exist for comprehension’s sake, but this certainly isn’t one of them. I personally have always preferred reading sentences with a double space at the end. It looks better and identifies the pause at the end of a sentence better.