AI keyboard for iPhone

4.7 / 5

Make every message sound right.

Checker is for the message you have already written but do not quite trust yet. Bring it into the keyboard, choose one edit, and keep the version that sounds like you.

Download on theApp Store

Free to download · Requires iOS 17.6 or later

Checker improving text inside its iPhone keyboard

How it works

Edit one message. See the difference.

Bring it in

Read from Input or use copied text.

Choose an edit

Check, change tone, shorten, rewrite, list, or translate.

Use the result

Send the version that still sounds like you.

Before

Hey I wanted ask if you free meet tomorrow?

After · Standard Check

Hi! I wanted to ask if you’re free to meet tomorrow.

You choose when Checker acts.

Only the message you select is sent for processing.

You start every request

Typing alone sends nothing.

The selected message goes online

It is sent to return the result.

Personal text is not stored

Checker does not store it on its servers.

Why Checker exists

Built by one person, for one reason.

I built Checker alone.

I have lived in many countries. I switched languages often, sometimes within the same day. One thing became clear fast: communication holds relationships together.

A message written well builds trust. A message written poorly creates distance.

Writing clearly matters more now than before. People connect across borders, cultures, and time zones every day. A short text or email shapes how someone sees you, long before you meet them.

Checker exists to help your words sound like you, wherever you write from and whoever reads them.

App Store reviews

Useful when the message needs more than autocorrect.

5-star reviews from across the globe.

★★★★★
Recommended app!
“Corrects and translates accurately. Beautiful, intuitive design.”
Baldi_99 · Italy

★★★★★
Great at correcting mistakes
“Never thought an app like this could be so easy to use.”
eli_mokerova · United States

★★★★★
100% worth it
“Writing in a foreign language always made me anxious. Not anymore.”
PersonaAff_ · Italy

What Checker does

Nine ways to refine a message.

Choose one action. No prompt required.

Standard CheckClear, natural, easy to understand.

FriendlyWarmer wording for chats and new people.

FlirtyPlayful and flirty tone.

FormalFor work, landlords, and official messages.

CasualSounds more relaxed and natural.

PoliteSofter wording for requests and first messages.

ParaphraseReword it, keep the meaning.

ShorterCut extra words, keep the point.

Make a ListTurns text into a clean bulleted list.

FAQ

Before you install

How is Checker different from my regular keyboard?

Your keyboard types: autocorrection, predictions, everyday conversation. Checker is for a second look at what you already wrote: correction, tone, rewriting, and translation.

Does Checker work in every iPhone app?

It works where iOS and the app allow third-party keyboards. Secure fields, phone pad fields, and apps that block keyboard extensions use the system keyboard instead.

Does Checker process text while I type?

No. You bring in a message and choose an action before Checker processes it.

Why does Checker need Full Access?

Full Access provides the network capability required for online grammar checks, rewrites, and translations.

Is personal text stored?

Checker does not store personal text on its servers.

Is Checker free?

Checker is free to download and includes limited AI checks. Optional Pro purchases provide higher limits and support longer text.

Checker for iPhone

Write it your way. Edit it when it matters. Send it with confidence.

Download on theApp Store