Proofread, with a paper trail
Proofread mode tags exactly what changed (spelling, grammar, punctuation) instead of handing back a silently rewritten paragraph you have to diff yourself.
uCheckermacOS 14+ · Available now
Your words.
A little clearer.
Select a passage, check or rephrase it from your menu bar, and copy the result when you're ready. On-device by default, with no account to create.
- Proofread and rephrase with Apple Intelligence
- Offline spelling on any supported Mac
- Custom modes and your own model endpoint with Pro
Proofread and Rephrase are free. A one-time Pro purchase adds custom modes and your own model endpoint.
Your text stays on your Mac by default. A custom endpoint is optional, needs Pro, and sends text to the provider you choose.
The details
Considered, down
to the little things.
Fixes mistakes, not your style
Your em dashes, curly quotes and British spelling survive a check. uChecker corrects errors, it doesn't flatten your voice into a house style.
Always a keystroke away
Trigger a check from a global hotkey, the menu-bar icon, or the macOS Services menu, without leaving whatever app you're already typing in. uChecker reads the selection and never writes to it: the result waits in the panel until you copy it.
On-device by default
Apple Intelligence and offline spelling both run locally, so your text makes no network connection unless you deliberately turn one on. No account, no analytics, no tracking SDKs.
Offline spelling, too
Offline spelling uses the system spell-checker and needs no Apple Intelligence, so it works on Intel Macs and older macOS versions too, and covers far more languages than the on-device model does.
Pro, bought once
Custom modes and connecting your own model endpoint are unlocked by a single in-app purchase. There's no subscription, and Apple handles the payment, not us.
Free & Pro
Free to check. Pay once to customize.
uChecker's core is free: Proofread and Rephrase, powered by Apple Intelligence where it's available and by the offline system spell-checker everywhere else, with no account to create and nothing to sign up for. Pro is a single one-time in-app purchase, not a subscription, and it unlocks custom modes and the ability to connect your own OpenAI- or Anthropic-compatible endpoint with an API key you supply. Purchases are processed and billed by Apple; we never see your payment details.
Questions about Pro?Before you start
At home
on your Mac.
- macOS 14 (Sonoma) or later to run uChecker at all.
- Apple Intelligence needs an Apple silicon Mac on macOS 26 or later, and supports a limited set of languages. It's one of several engines, so uChecker works without it.
- Offline spelling works on any supported Mac, Intel included, with no Apple Intelligence required.
- A custom endpoint (Pro) needs an internet connection and your own API key; the key lives only in your Mac's Keychain.