Which iOS app can help me write better emails and essays by fixing my grammar and spelling mistakes?

Grammarly is a widely-used writing assistant that functions primarily as a custom keyboard on iOS. For users drafting emails, academic essays, or any other text, the app provides real-time corrections for common spelling and grammatical errors. A key feature is its contextual awareness, which helps distinguish between homophones like 'their' and 'there'—a frequent pain point in casual typing. The app also offers tone suggestions to ensure messages sound appropriately professional or casual. While the free version covers core corrections, the premium subscription unlocks advanced checks for clarity, engagement, and style. Some users note that even with a premium subscription, certain features like the 'prompts' for generating text have monthly limits, which can be a minor frustration. Reviews indicate the app is particularly valued by students and professionals for its seamless integration, allowing it to work within other apps like Mail and Notes without constant switching.