Mighty Key

Korean keyboard · Spell check · Translation

One more look,
right where you type.

From a quick message to a work email, your everyday Korean keyboard checks spelling and spacing, and translates without switching apps.

No subscription, top up as needed · iOS and Android

No more copying into a checker

  1. Type as usual

    Write with Mighty Key in messengers, mail and notes.

  2. Pause for a check

    When you pause, suggestions appear above the keys.

  3. Tap to fix

    Tap only the suggestions you want; the text changes in place.

Built to be your main keyboard

Right where you type

Check spelling and spacing in other apps and tap a suggestion to fix it.

You choose

See what changed and apply only what you pick. Your tone stays yours.

Translate in the keyboard

Translate into your chosen language and insert it directly.

Familiar layouts

Dubeolsik, Cheonjiin and Moaki Korean layouts plus English QWERTY.

Everyday shortcuts

Saved phrases, shortcuts, clipboard and emoji are one tap away.

What we send, and what we do not

A keyboard handles what you write, so we spell out how it works. Privacy

  • AI correction and translation run only after you consent to sending text; withdraw any time in settings.
  • Only the text being checked is sent, never every keystroke.
  • Text and results are not kept as per-account history and are not used to train AI.
  • Sensitive input such as passwords, codes, card, account and passport numbers is never checked.
  • No advertising identifiers, no selling personal data, no cross-app tracking.

No subscription. Pay for what you use.

300 credits for KRW 3,300

  • A one-time top-up with no automatic renewal. Check your local price on the store.
  • New accounts receive trial credits.
  • Typing works without internet or credits.

Questions

Why does iPhone need Full Access?

iOS requires Full Access for a keyboard to use the internet. It is needed only for spell check and translation; typing works without it. Full Access and AI consent are separate choices.

Which apps does it work in?

Most apps that accept keyboard input. If a field refuses edits or its text has changed, Mighty Key leaves the text untouched and tells you.

Does it check password fields?

No. Secure fields reported by the system and text containing sensitive numbers are never checked, and automatic checks skip fields such as search and user name.

Where is it available?

Online correction, translation and top-ups are available in Korea, the United States and Japan.