Pocket's latest update for iOS comes with an awesome treat for its premium users. Besides giving them access to a permanent library, they can also start customizing their reading experience. They can adjust a page's margin width and line-height spacing to their heart's content. Plus, they can choose from seven new reading fonts or switch to Dyslexie, a font that makes it easier for dyslexics to read. Pocket also threw in a feature called Auto Dark Mode that automatically changes the app's theme, depending on the ambient lighting it senses. Its premium subscription isn't cheap at all at $4.99 a month -- but if these features make it worthwhile, you can upgrade in-app anytime.