CMD-C.app
Verified Oct 15, 2026 ActiveTriple-tap Cmd-C on macOS to run AI grammar and style correction on selected text in any app.
Listed on EffectHub ·
Pricing
- Pricing model
- Freemium
- Paid options from
- $2.99/mo
- Billing
- Monthly
Free with your own OpenAI or OpenRouter API key. The Premium licence is $2.99 a month with the built-in AI; the pricing card says 7,000 corrections a month while the intro text says up to 8,000.
Use tool ↗About CMD-C.app
CMD-C is a macOS utility that corrects grammar, punctuation and style in whatever text is selected in any application, triggered by pressing Command-C three times instead of switching to a separate editor. It runs free with your own OpenAI or OpenRouter API key, or through a $2.99 monthly licence that uses the vendor's built-in AI with a monthly correction quota. You can edit the correction prompt and review a history of past corrections with explanations. The app needs macOS Accessibility permission, is distributed as a direct download rather than through the App Store, and the site says the build is signed by CailTech Inc.
- Platforms
- macOS
- API
- Not confirmed
- Last verified
- Oct 15, 2026
Verified sources
- Pricing cards: Free with your own OpenAI/OpenRouter API key; Premium licence $2.99/month for 7K corrections a month with the built-in AI; intro text says up to 8,000 (15 October 2026)cmd-c.app ↗
- Download section: requires macOS Accessibility permissions, direct .dmg download, 'Signed by CailTech Inc.' (15 October 2026)cmd-c.app ↗
Is CMD-C.app legit?
We don’t label tools safe or unsafe. Below are the records we checked ourselves, each with the date we read it.
- Domain registered
- Oct 26, 2024 (2 years ago)Registry record (RDAP), registrar Name.com, Inc., looked up Sep 6, 2026
- TLS certificate
- Issued by Let's Encrypt, valid until Nov 20, 2026Seen in our own connection to the site on Oct 15, 2026
- Last checked
- Oct 15, 2026The site answered
- Operated by
- CailTech Inc.Our research, card verified Oct 15, 2026
Pros & cons of CMD-C.app
CMD-C's system-wide shortcut avoids the usual grammar-checker friction of copying text into a separate app, and the bring-your-own-API-key option makes it effectively free for anyone who already pays for OpenAI or OpenRouter directly. It's macOS-only and a small one-developer utility, so long-term support rests on very little.
Pros
- Works inside any macOS app via a keyboard shortcut, no copy-paste to a separate tool
- Free tier available for users with their own API key
- Cheap paid tier at under $3 a month for several thousand corrections
- Correction history with explanations, not just silent edits
Cons
- macOS only, no Windows or Linux version
- The only company detail is a code-signing name, CailTech Inc., and support goes to a personal email address
- Free tier depends on the user already holding a separate paid API key
- The site quotes both 7,000 and 8,000 monthly corrections for the same plan
Best for
- macOS users who want grammar correction without leaving their current app
- People who already have an OpenAI or OpenRouter API key and want a free option
- Anyone wanting an editable prompt and a correction history
Not for
- Windows or Linux users, since it's Mac-only
- Anyone wanting an established company and support channel before trusting it with their text
Watch out: The free option isn't really free if you don't already have an OpenAI or OpenRouter API key, since acquiring one has its own cost.
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