Grambo App

Grambo App is a grammar checker and AI writing assistant for Mac. It is built for correcting grammar mistakes, spelling errors, and style issues while a person writes, and it is described as private by default, fast, and available offline. Grambo Cloud is an optional mode for instant setup.

The app offers grammar correction with AI-powered suggestions tailored to a user’s writing style, along with spelling and punctuation checks. It also includes style enhancement tools for clarity, conciseness, and readability, plus real-time analysis with on-device processing. Grambo can be triggered with the keyboard shortcut ⌘ ⇧ G, and it supports multiple shortcut options for different actions. It also includes custom prompts for matching a voice or use case, a memory feature for names, brands, and technical terms, and before-and-after comparison so changes can be reviewed.

Grambo works across Mac applications, and the page names Safari, Chrome, Mail, Messages, Slack, Notion, Word, Pages, Notes, Telegram, WhatsApp, Discord, Obsidian, and Bear among the supported apps. It is described as a native Mac app designed specifically for macOS and requires macOS 15 or later. The product page also states that it supports over 90 languages.

Pricing is presented as either a monthly plan or a lifetime purchase. The monthly plan includes Grambo Cloud, offline AI processing, bring your own API key support, all grammar checking features, use across apps, 90+ language support, cancellation anytime, and use on up to three devices. The lifetime plan includes offline AI processing, bring your own API key support, all grammar checking features, use across apps, 90+ language support, future updates, no recurring payments, and use on up to three devices, but not Grambo Cloud. A 7-day free trial is offered with no credit card required.