Grammarly: AI Keyboard & Notes

Grammarly's iOS keyboard has matured into a genuinely useful writing layer that sits on top of every app on your phone. At its core it catches spelling and grammar mistakes in real time, but the more interesting pitch is the generative rewrite system that can reshape a whole message for tone, length, or fluency without you ever leaving the app you are typing in. The 304 MB install is hefty, and the best features sit behind a paywall, but the free tier still does meaningful work.

Works Where You Actually Type

The keyboard integrates system-wide, so corrections appear whether you are drafting a Slack reply, a Notes entry, or an email. That no-copy-paste workflow is the real selling point. Tone detection is available without paying, which gives you a live read on whether a message comes across as confident or passive. Multi-word predictions and swipe typing keep pace with native iOS options, so switching does not feel like a step backward in day-to-day speed.

Where the Paywall Bites

Vocabulary suggestions, clarity rewrites, and tone transformations are all Premium-only features. Free users get grammar and spelling across 20-plus languages plus generative rewrites, which is a reasonable baseline, but the features most likely to improve professional writing are locked. Voice dictation with automatic cleanup is a standout free inclusion, though, and the emoji prediction bar is a small but genuinely handy touch for faster casual messaging.

Who Gets the Most From It

Non-native English writers and anyone who sends a high volume of professional messages will feel the value fastest. Support for typing in 6 languages and spell-check across 20-plus means it is not an English-only tool. Casual users who are happy with Apple's built-in keyboard may find the 304 MB footprint hard to justify. Power users who upgrade to Premium get a meaningfully different product, so the free version is best treated as an extended trial.