Hey HN!<p>Here is my simple native macOS app for correcting grammar — CMD+C.<p>I'm a non-native English speaker working in English-speaking teams, and I care about how my Slack messages and other communications come across. Frustrated with switching between grammar tools, apps that don't support some input boxes, and endless copy-pasting, I built CMD+C — a simple macOS app that corrects grammar on the fly in any app, with just a triple-click.<p>Features:<p>1) Triple-click "⌘+C" to correct any selected text instantly, no matter where you're typing.<p>2) Use your own API key (OpenAI, Anthropic) or access premium corrections with our plan.<p>3) View correction history with explanations from GPT why it was corrected and export JSON/CSV if needed.<p>How it works:<p>1) Intercept triple "⌘+C" shortcut in macOS<p>2) Process text with LLM (OpenAI, Anthropic) with custom prompt<p>3) Replace selected text with the corrected version and save it to better understand why and how it was corrected<p>CMD+C was built in 7 days, is free to use, and I plan to share the source code later this month.<p>I've never built anything before, so I'd love your feedback - let me know what you think!
Hope someone finds it useful!