Yuki Writer — a writing app for clearer sentences

Every writer needs an editor.

Yuki is a writing app that helps you spot what could be clearer and suggests ways to improve it.

See where your writing could be clearer

Yuki highlights long sentences and the words that weaken them, so you can give them a second look. You decide what to change.

Long sentences

Sentences that are long or hard to read are marked in yellow. Consider shortening them or splitting them in two.

The report that we sent to the team last week covers the budget, the hiring plan and the dates for the next two releases and the launch.

Very long sentences

Sentences that are very hard to read are marked in red. Breaking them up can make them easier to follow.

When the meeting ended, which was later than anyone had planned because the projector failed twice, we agreed to move the launch to May and to ask the design team for new screens before then.

Weakeners

Filler words, hedges like “I think” and intensifiers like “very” are struck through, so you can read the sentence without them. Remove deletes one in a click.

We actually think the new plan is really quite good.

Make the next edit yours

Place the cursor on a highlight to see why Yuki marked it and what you can do next.

Remove a weak word in a click, or ask Fix it for me for a suggested rewrite of a long sentence. Compare it with your original, then choose whether to use it.

Runs on your Mac

Yuki finds the highlights with plain rules on your Mac. Fix it for me runs on your Mac as well. Your writing stays with you.

Apple's on-device model: The default. It is built into macOS, free, and needs no download. It needs macOS 26 with Apple Intelligence turned on.
A model you download: Four open models, from Ministral 3 3B to Gemma 4 26B A4B. Yuki recommends the largest one your Mac runs well, downloads it once from Hugging Face, then runs it on your Mac.

Choose the model in Settings → Editing model.

A model for every Mac

Measured on a Mac with an M5 Pro and 64 GB of memory: the time from Fix it for me to the suggestion, on five long sentences. The explanation of the changes follows a few seconds later. The downloaded models are open, under the Apache 2.0 license.

A rewrite by Gemma 4 26B A4B, on a Mac

Your sentence

It is important to note that the roses, which were planted by my grandmother many years ago, require a considerable amount of attention in order to continue to bloom.

Suggestion

The roses my grandmother planted many years ago require considerable attention to continue blooming.

Why it reads better

which were planted by my grandmother → my grandmother planted Active voice is more direct and engaging than passive voice.
a considerable amount of attention → considerable attention Wordy phrase: one word says the same.
in order to continue to bloom → to continue blooming “In order to” can often be simplified to “to”.

Also in the app

Reading ease: Keep an eye on your word count and Flesch reading-ease score as you write.
Markdown: See bold, italic and code formatting as you type. Press ⌘⇧P to preview your writing.
Light and dark: Yuki follows your Mac's appearance.
Updates: New versions download in the background and install when you quit or restart. You'll see what's new afterward.

Questions

Which Macs does it run on?: Macs with Apple silicon.
Which languages does it check?: Yuki's writing checks are designed for English.
Does my writing leave my Mac?: No. The highlights, writing checks and Fix it for me run on your Mac, using Apple’s on-device model or a model you download.
Why is a sentence marked when it reads fine?: Yuki marks sentences by length, without judging their meaning. Some long sentences work well as they are. The choice is yours.
Does Yuki check grammar?: Yuki focuses on sentence length and words that weaken your writing. It does not check grammar.

Try it on your own writing.

Download for Mac

Version 0.1.5, for Macs with Apple silicon.