Spelling correction,
grammar
fixes and
word prediction.

Yes, Charm works in every Mac app. Mac apps handle text in two different ways, so Charm has a mode for each and sets the right one for you automatically.

Automatic corrects inline as you type. It is the default for native Mac apps, where Charm has full text access, and needs no setup.

Manual fixes text on demand with Fix Selection (⌥⌘V). It is used for web browsers and Electron apps, which handle text differently. Select your text, press the shortcut, and Charm fixes it instantly.

Charm sets the right mode for every app automatically and detects newly installed apps on every launch. You can override any app's mode in Settings.

Yes. Charm picks the right mode for each app automatically, but you stay in control. In Settings you can set any app to Automatic (corrects as you type, best for native Mac apps) or Manual (corrects on demand with Fix Selection, ⌥⌘V, best for web browsers and Electron apps).

You can also turn Spells, Polish, and Oracle on or off individually for each app.

Fix Selection is an on-demand shortcut (⌥⌘V by default, customisable in Settings) that fixes spelling, grammar, capitalisation, and punctuation. It works everywhere, including web apps, code editors, and any text field that supports copy and paste.

Select text and press the shortcut to fix just that selection. If nothing is selected, Charm automatically selects all text in the field and fixes everything.

Some Mac apps have their own built-in macOS autocorrect. You have two options: disable that native autocorrect in System Settings and let Charm handle everything, or use Charm's per-app settings to choose exactly which features run where. You can also set those apps to Manual mode and use Fix Selection when you need it.

Right now Charm supports UK English and US English, switchable in Settings. Other languages are on our roadmap for future development.

We built an interactive guide that walks you through every feature in your browser: spelling, grammar, prediction, undo, dictionary, and Fix Selection. It takes about two minutes.

Try the interactive guide →

macOS autocorrect only fixes spelling, and often makes things worse. Charm does three things: spelling correction, grammar fixing (capitalisation, punctuation, apostrophes), and word prediction. Plus you can undo any correction with Backspace or ⌘Z, and use Fix Selection to fix text on demand in any app.

Press Backspace or ⌘Z to undo it immediately. Your original word comes right back, and Charm offers to add it to your personal dictionary so it won't change that word again. Press Backspace again to remove the word entirely.

No. Charm is lightweight at idle. On first launch you'll download a local AI model, around 1.5 GB for the lite version or 1.7 GB for the recommended one. One-time only. After that, everything runs locally with minimal CPU usage and corrections happen in under 200ms.

Charm has a personal dictionary that learns your vocabulary. The first time it corrects a name, technical term, or slang you use intentionally, press Backspace or ⌘Z to undo, then Y to add it to your dictionary. After that, Charm never flags it again.

No. Corrections happen entirely on your Mac. Your keystrokes never leave your computer. Zero servers, zero cloud, zero tracking.

No. Charm runs entirely offline. All corrections and predictions happen on your Mac using a local AI model. The only time you need a connection is the initial app download and to download the local AI model on first run.

Charm is a one-time purchase of $9.99, with no subscription. Every feature is included, so there is nothing extra to unlock later.

There is no separate free trial, because every purchase comes with a 14-day money-back guarantee. Buy Charm, use it for two weeks, and if it is not for you, email support@theodorehq.com for a full refund. That is your risk-free trial.

Yes. Each license key works on up to 3 Macs. Your license is tied to the key, not the machine.

Automatically. Charm has a built-in updater that checks for new versions in the background. When an update is available, you'll see a notification, one click to install. Updates are free forever with your license.

Charm needs two macOS permissions: Accessibility and Input Monitoring, both switched on in System Settings > Privacy & Security. They sit in two separate lists, so it's easy to have one on and the other off. After enabling both, quit and reopen Charm so macOS registers them. To confirm it's working, type teh followed by a space in any native Mac app; it should become the.

macOS usually needs Charm to relaunch before it recognises a newly granted permission. Quit Charm fully (menu bar icon, then Quit) and reopen it. Also double-check both permissions are on: Accessibility and Input Monitoring are in two different lists under System Settings > Privacy & Security.

Fix Selection is a manual mode that works in any app, including ones where live correction isn't possible. Select the text you want cleaned up and press ⌥⌘V; Charm fixes spelling and grammar in one pass. You can change the shortcut in Charm's settings.

Charm corrects live in native Mac apps. If it works in one app but not another, check two things: the other app may be a web browser or Electron app, where you use Fix Selection (⌥⌘V), or the app may be switched off in Charm's per-app settings. Open Charm's settings and make sure Spelling is enabled for that app.

No. Recent updates added safeguards so a correction only applies when it forms a real word and lands exactly where intended. Make sure you're on the latest version via Check for Updates. If you ever see a correction land oddly, let us know at support@theodorehq.com.

Web browsers and Electron apps handle their text in a way that doesn't let Charm safely rewrite it live as you type. In those apps Charm uses Fix Selection instead: type as normal, then select the text and press ⌥⌘V, and Charm cleans it up in one pass. Charm switches to this mode automatically in those apps and lets you know when it does.

Make sure you're on the latest version: open Charm and choose Check for Updates. Recent updates significantly reduced how much work Charm does while you type in a browser. If it still feels heavy afterwards, email support@theodorehq.com and we'll take a look.

Everything Charm does happens entirely on your Mac. Nothing you type is ever stored or sent anywhere, there's no cloud and no account, and Charm works fully offline. It only acts on the text you're actively writing, and it stays out of your browser's address and search bars.

No. Charm skips password fields entirely and doesn't read them at all. And because everything runs on-device, nothing you type anywhere is stored or transmitted.

Yes. In Charm's settings you can switch between the on-device models Charm includes (Gemma 2 2B and Qwen 2.5 3B). Both run entirely on your Mac. Custom or third-party models aren't supported yet.

Charm predicts the next word as you type (press Tab to accept), and it now also learns short phrases you write often and offers the whole phrase with a single Tab, all on your Mac. Predicting longer, original sentences is in active testing and will arrive as a free update.

You can download the latest version any time at theodorehq.com/charm/download. Your license key activates Charm on up to 3 Macs.