KoheraKohera reads your manuscript along with you and notices where it contradicts itself.
A writing app for novels on the Mac. It collects the characters, places and rules of your world from the text and checks every chapter against them. The writing stays yours.
I had hung my shaving glass by the window, and was just beginning to shave. I saw the Count’s face clearly reflected in my shaving glass.
After Bram Stoker’s “Dracula”, chapter II, with one error put in.
Kohera is coming to the Mac App Store. Runs on macOS 26 or later.
Collect
Kohera recognises characters, places and concepts in the text and suggests them as entries. Every statement names the passage it comes from. You accept, change or reject.
Set down
You decide what holds in your world: rules, backstories, relationships, formative events. These foundations stand above everything the AI reads from the text.
Check
Kohera proofreads a chapter for spelling, style and continuity. Contradictions with rules, characters and the timeline appear as notes in the margin, next to the statement they contradict.
Suggest
When a dialogue stalls, Kohera shows three ways the character could react at this point: a line, a gesture, an attitude. Each comes with a reason drawn from what is established about the character. Nothing is inserted on its own.
Keep track
The timeline shows which character is where, and when. Follow values such as fear or standing across the chapters.
You write
Focus mode shows only the text. The AI never speaks up there, and it never changes a word unasked anywhere.
You decide which model reads along
Kohera has no account and collects no data. For the AI you choose the model on your Mac (Apple Intelligence), a server of your own such as Ollama or LM Studio, or a provider where you hold an API key yourself. Before any text goes to a provider, Kohera asks you.