Grammarly: AI Keyboard & Notes

System-wide corrections work reliably across apps

Grammarly replaces the native iOS keyboard entirely, meaning corrections surface whether you are composing a Slack message, drafting an email, or filling out a form in Safari. That system-wide integration is the core value proposition, and it works reliably across virtually every text field. Real-time grammar and spelling corrections cover more than 20 languages, tone detection reads the emotional register of a message without requiring a subscription, and generative rewrites can reshape a full paragraph for length or formality without leaving the active app. Multi-word prediction and swipe typing keep pace with Apple's own keyboard, so daily typing speed does not suffer. The feature set is coherent and well-executed at the free tier, even if the most sophisticated tools require upgrading.

Large install size offsets responsive performance

A 303 MB install is notably large for a keyboard utility, and first-time setup requires navigating iOS accessibility settings to grant full-access permissions, which adds friction. Once running, though, the keyboard behaves responsively in normal conditions. With over 219,000 ratings averaging 4.66 stars, user-reported stability is strong for a tool of this complexity. Suggestion latency is generally low for grammar and spelling, though AI-powered rewrite suggestions can take a beat longer on older hardware, which is expected for on-device or cloud-assisted inference. Voice dictation with automatic cleanup is a standout inclusion that works smoothly for hands-free drafting.

Free tier offers real value with limits

The free tier delivers genuine, everyday value: grammar and spelling corrections across 20-plus languages, tone detection, voice dictation with cleanup, emoji prediction, and generative message rewrites. That is a meaningful baseline most competing keyboard apps cannot match at no cost. The ceiling, however, is Premium, which locks away clarity rewrites, vocabulary enhancement, and tone transformation. These are precisely the features most likely to improve professional writing quality. For anyone already paying for Grammarly Premium on desktop, adding the iOS keyboard is an obvious extension of an existing subscription. For free-only users, the app is best understood as a capable but deliberately limited trial of a fuller product.

Full keyboard access requires careful data review

Grammarly requests full keyboard access, which is required for any third-party iOS keyboard that processes text in real time. Apple displays a system warning when this permission is granted, noting that the developer could potentially log keystrokes. Grammarly publishes a privacy policy stating it does not sell personal data and does not log keystrokes for advertising, but users should review the App Store privacy nutrition label directly, as that is the authoritative disclosure of what data is collected and how it is linked to identity. Anyone typing sensitive material such as passwords or financial details should be aware that best practice is to switch back to the native keyboard for those inputs.

Clean design hampered by accessibility gaps

The keyboard interface is clean and visually consistent with Grammarly's broader design language, using a suggestion bar that does not feel cluttered despite offering multiple options simultaneously. Correction highlights are unobtrusive, appearing as underlines rather than disruptive popups. The Notes app included with the keyboard provides a focused writing space with the same correction layer. Standard iOS Dynamic Type and system font scaling apply to the companion app. For users who rely on VoiceOver, third-party keyboards have historically presented some navigation challenges on iOS, and Grammarly is no exception. Users with accessibility requirements should test the keyboard in their specific workflows before committing.

Active development signals long-term commitment

Version 13.0.0, released to coincide with a July 2026 update, signals that the development team is treating this as a major, actively evolving product rather than a maintenance release. The app launched in November 2017 and has received consistent updates across nearly a decade, which is a strong indicator of long-term commitment. The jump to a version 13 milestone suggests meaningful platform investment rather than incremental patching. Given Grammarly's position as a well-funded, commercially significant product, the iOS keyboard is unlikely to be abandoned, and the update cadence supports confidence in ongoing feature development and compatibility with new iOS releases.