This app uses artificial intelligence algorithms to understand the meaning of your words and to spot the mistakes.

When you spend all day writing emails and reports, it's easy to make typos. Unfortunately, it only takes one misplaced letter to cause serious embarrassment. WhiteSmoke is a top-rated app that uses intelligent algorithms to spot your little (and big) mistakes. It works across all major platforms, providing assistance with spelling, grammar, and more. You can currently get a lifetime Premium subscription for $61 at the PopSci Shop. Right now, you probably rely on Microsoft Word or Google Docs to flag up problems in your prose.