Grammarlyzer: Grammar & AI

Grammarlyzer is a calm, private writing studio in your pocket. It checks your grammar on-device and polishes your wording with AI — so your drafts read clearly and sound the way you mean them to.

WHY GRAMMARLYZER

• Private by default — grammar checking runs on your device with the Harper engine. Your text is not uploaded just to be checked.
• Fast, focused fixes — spelling, grammar, punctuation, and usage issues are surfaced inline with one-tap corrections.
• AI Polish — rewrite a sentence or a whole draft in the tone you need: clearer, more concise, more formal, or more casual. (Polish runs in the cloud and requires sign-in.)
• Editorial, not noisy — a clean, distraction-free editor instead of a busy dashboard.

WHAT YOU CAN DO

• Catch errors as you type and apply suggestions instantly.
• Polish emails, messages, essays, and posts before you send them.
• Keep a personal dictionary so your names and terms are never flagged.
• Review your polish history.

FREE AND PRO

Grammarlyzer is free to use. Free accounts see a small banner ad. Upgrade to Grammarlyzer Pro to remove ads and unlock longer drafts and advanced AI Polish styles.

• Pro Monthly and Pro Yearly subscriptions are available.
• Payment is charged to your Google Play account at confirmation of purchase.
• Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Google Play.

PRIVACY

Grammar checking happens on your device. Cloud AI Polish only sends the text you choose to polish. Read our privacy policy at https://youngseokoh.github.io/grammarlyzer-privacy/