CronKey
Sentence suggestions
Get five natural sentences based on what you've written. Pick a tone and CronKey remembers it for next time — tap a suggestion and it drops straight into the text field.
FriendlyWarmWorkRomanticFlirty
⌨️ Custom AI keyboard
Stuck on a reply?
Stuck on a reply?
Let CronKey write it with you
From AI sentence suggestions that fit what you're typing to AI chat right inside the keyboard, spell check, translation, your own emoticons and photo themes — all in one keyboard.
- Free
- iPhone (iOS 16.7+) · Android
- Start instantly as a guest — no sign-up
At a glance
In any app, right from your keyboard
Switch to CronKey in your messenger, email or notes and every AI feature is right there.
Screenshots show the Korean interface.
Features
Help for the moment you type
Just tap a button when you need it. CronKey takes care of the rest.
AI chat in the keyboard
Tap the AI button on the keyboard to ask CronKey, your AI friend, from any app. Tap an answer and it pops right into the text field.
Spell check
Fix spelling, spacing and grammar in one go — and see exactly what changed. Works for Korean, English and other languages.
Translate
Translate just the sentence you wrote — tap the result and only that part is replaced.
KoreanEnglishJapaneseChineseSpanishFrenchGermanVietnameseThaiIndonesianRussianPortuguese
Your own emoticons
One photo or a one-line description is all it takes — CronKey draws the emoticon for you. Cute default emoticons are included, too.
Keyboard themes
Social Blue, Navy, Cherry Blossom, Mint, Lavender, Sunset, Ocean, Mocha and more — plus a photo theme with your favorite picture as the background. Adjust key color, transparency and photo brightness to taste.
Voice input
Tap the mic and speak — CronKey turns it into text.
Typing sounds & haptics
11 sounds, including Click, Typewriter, Mechanical (clicky · silent), Bubble, Water Drop, Wood, Marimba and Retro. Haptics can be switched on or off.
CronKey, your AI friend
Chat when you're bored and ask whatever you're curious about. Show it a photo or just ask out loud — it has answers.
Friends
Find friends by ID, or automatically add friends from your contacts who already use CronKey.
Start without signing up
Just tap Start and use it right away as a guest.
Privacy
How we protect what you type
Everything you write passes through your keyboard. That's why CronKey only handles the text it needs, and only at the moment it's needed.
Full details are in our Privacy Policy.
- Everyday typing is never stored or sentWhat you type on the keyboard never leaves your device.
- Sent only when you tap an AI buttonText is sent for AI processing only when you tap an AI feature button (powered by Google Gemini).
- Contact numbers stay unreadablePhone numbers used to find friends are converted into unreadable values before they're sent, and they're never stored.
- Safety filters and reportingA safety filter blocks inappropriate requests, and you can report AI answers from the chat menu.
Get started
Ready in three steps
After installing the app, just follow the guide in the Keyboard tab.
- Add the keyboardFollow the guide in the app's Keyboard tab to add the CronKey keyboard.
- Allow Full AccessTurn on Allow Full Access to use AI features, emoticons and photo themes.
- Switch to CronKeyIn any text field, tap the globe key to switch to CronKey — and you're all set!
Full Access is needed to send AI requests over the internet and to share emoticons and themes with the app. Even with it turned on, what you normally type is never stored or sent.
