Reading a paper aloud uncovers errors and issues that might have otherwise gone undetected. If you have a draft of your paper, try reading it aloud, or have a friend read it aloud for you. Places where you stumble, the words are not clear, or the phrasing does not sound right are good places to consider revising.
The iPhone can also read your text aloud for you! Set “Speak Selection” to on (go to settings, general, accessibility, then speech selection), and adjust the speaking rate. Highlight any portion of your text, click “speak,” then listen to your text spoken aloud.