Grammar Guru

What Grammar Guru is

Grammar Guru is an AI-powered writing assistant for checking and improving text. As users type, it flags grammar, spelling and punctuation issues, with suggestions intended to improve clarity, conciseness and engagement. Its rewriting tool can recast text in different tones and styles, and tone detection and style suggestions are listed. The product is available on the web, as a browser extension, and on Linux, macOS and Windows; there is no mobile app. Chrome and Edge extensions support version 88 or later, while Firefox and Safari extensions are described as in development. The maker lists Gmail and Google Docs support for Chrome, and Outlook and Office 365 support for Edge. The free plan includes five daily rewrites and a 500-character limit. Standard costs $1.00 per month, billed at $0.83/month when billed yearly, and lists unlimited rewrites and a 50,000-character limit. The separate Windows App plan costs $1.00 per month, billed at $0.83/month yearly, and advertises offline support. Grammar Guru says its AI grammar and rewriting services require an internet connection, while the Windows App plan separately lists offline support.