EPOS-AI: the Guide
As of 17 August 2026
This guide covers everything you can do in EPOS-AI. It follows the order you actually work in: first the manuscript, then the writing, then the checking, and the output last.
For every function it tells you three things: what it does, what it reads, and what it costs. And it tells you where the limits are. A tool that hides its limits costs you time in the wrong place.
Contents
1. How EPOS-AI is laid out
Eight areas run along the top bar:
Dashboard is your overview: word count, chapters, writing goal, recently edited chapters.
Write is the editor. This is where you spend most of your time. To its right sits the AI studio with the tools that work on the open chapter.
Analysis checks your manuscript across chapter boundaries: characters, timelines, logic, tension.
World is the workshop: develop characters in depth, record settings and rules, the project bible, genre conventions.
Publishing is the output: synopsis, formatting, export as PDF, Word or EPUB.
Autopilot holds the tools around publication.
Extras covers credit, add-on packages and referrals.
Pro Editing works through a whole manuscript in one pass.
Top right you will find your token balance, the day and night switch, the language switch between German and English, an envelope for reporting problems, and the question mark that leads to this guide.
2. Your project
Starting a new project
Click the project name at the top left. From there you can start an empty project or upload an existing manuscript.
Uploading a manuscript
The import accepts DOCX, PDF and TXT. Other formats are deliberately not offered, because they would not come through cleanly.
The import runs in two steps: EPOS reads the file, shows you the chapter split it detected, and only then creates the project. If the split is wrong, you fix it before the project exists rather than afterwards.
Managing chapters
The chapter list sits on the left of the editor. There you add chapters, rename them, duplicate them and drag them into a different order.
A project holds up to 500 chapters. A chapter title can be up to 500 characters long, and up to 200 when you rename it later.
You can only delete a chapter if at least two exist. A deleted chapter takes its editing results and analyses with it.
3. Writing
Saving
You never have to save. EPOS saves shortly after you stop typing, and immediately when you switch chapters, leave the tab, or press Ctrl and S. The editor tells you whether your work is saved.
Your text is backed up on top of that. With every change EPOS stores a copy of the previous state, up to twelve states per chapter, and immediately whenever a chapter suddenly gets much shorter. You do not see this backup in the interface, it is a net for the bad day. If text goes missing, write to us: in almost every case we can bring it back.
The toolbar
Undo and redo, two heading levels, bold, italic, underline, clear formatting, list, quotation. Plus a keyboard shortcut for typographic quotation marks.
All of it runs in your browser and costs nothing.
Focus
The ring button hides everything that is not your text. Three levels: quiet column, dimmed light, typewriter. F11 takes you in, Esc brings you back.
Printing
You can print the open chapter or the whole book. For the open chapter, what is on screen gets printed, even unsaved. For the whole book, the saved state is loaded.
History
The history button shows your earlier runs: editing passes, style analyses, logic checks and tension analyses. Free, it only looks things up.
4. The sparring partner
The sparring partner is a conversation about your book, not a text generator. You ask, it thinks with you: why a scene does not land, whether a character acts believably, how to prepare a turn.
What it reads: your earlier messages in this project, plus context from your manuscript when a project and a chapter are open. How much depends on your plan: Starter 30,000, Professional 80,000, Studio 150,000 characters.
What it remembers: after every eight new messages EPOS condenses the conversation into a summary. The thread survives without the whole exchange being sent along each time.
Cost: yes, every reply uses tokens.
The menu in the AI studio lets you clear the memory. That removes the sparring history, not your editing results.
5. Spell check
You start the check yourself: from the tile, the toolbar button, or with F7. It no longer runs along automatically, because every check costs tokens and you should decide when it is worth it.
What it reads: the whole open chapter, up to 30,000 characters.
Cost: around 740 tokens per check on average, measured across 430 real runs. It is the cheapest AI function in the house.
What you can do with a finding
Replace puts the suggestion straight into your text.
Ignore in this chapter remembers that this word is fine here. It stays gone even after you close the chapter and check again later. The check window shows how many words you have ignored here, and you can reset the list at any time.
Learn word adds the word to your personal dictionary. That applies to every chapter and every project. For character names and invented terms this is the right choice.
The difference matters: ignoring works in one chapter, learning works everywhere. Both hold up to 500 words.
6. Editing
Editing works on the open chapter. There are four levels, and they differ not in thoroughness but in what they look at.
Proofreading. Spelling, grammar, punctuation, formal consistency. Reads your chapter only.
Style editing. Word choice, rhythm, filter verbs, repetition, living verbs, show rather than tell. Reads your chapter only.
Structural editing. Tension, scene construction, pacing, conflict, character consistency, plot logic. This level also receives context from your manuscript, between 40,000 and 200,000 characters depending on your plan.
Full editing. All three levels in turn on the same chapter. The name refers to depth, not scope: it is still one chapter. For the whole book there is Pro Editing.
Cost: across all editing types, around 40,600 tokens per run on average, measured across 482 real runs. The spread is wide, because a short chapter with one level and a long chapter with three are far apart. Before you start, the confirmation window tells you roughly what to expect, and the button Calculate actual usage counts the exact figure for your specific chapter. That counting is free.
Plan: from Professional. Structural editing, and the content level inside full editing, require Studio. Before you start you can see which levels your plan includes.
Voice-true editing
The switch in the editing window makes EPOS learn how you write, so that suggestions which do not sound like you are never made in the first place. The profile is built from your own text, not from other authors.
For style editing there is a second pass: suggestions that drift too far from your voice are rewritten once more, closer to you. That happens automatically and at no extra charge.
7. Pro Editing
Pro Editing takes on the whole manuscript, chapter by chapter, and keeps running in the background even if you close the window.
You pick a thoroughness level. It decides which levels run and how strictly the results are filtered. Then you pick the source: an EPOS project or an uploaded manuscript.
Before you start you can have the actual usage calculated. That costs nothing and is more accurate than any estimate.
A run across a book takes several minutes to over an hour. You can watch the progress and cancel.
At the end you get two things: the review inside EPOS (see the next section) and a Word file in publishing format, with tracked changes and margin comments.
8. The review
Editing a whole book quickly produces several thousand findings. In a Word file no human can work through them. That is what the review is for.
You open it from the Review button in the Pro Editing job list, or from the results window of the editor pass.
What you see: every finding, grouped by chapter, in text order. Each one shows the severity, the level, the category, the passage concerned, the reasoning, and a suggestion where there is one.
Filtering. By level, severity, category and chapter, in any combination. The count of currently visible findings is always on screen.
Grouping. If the same kind of finding occurs five times or more in the same chapter, EPOS folds them into one group you can open. Four thousand single items become a few hundred. You can switch the grouping off.
Working through. Every finding can be marked done or not relevant. That is stored, even after you close the window. A progress bar runs along the top.
Jump to this spot. One click opens the chapter at the passage concerned.
Applying
Findings that carry a finished replacement text have an Apply button. One click puts the suggestion into your chapter at exactly that spot. Undo appears right next to it.
Three things are worth knowing.
First, not every finding can be applied. Many are comments or instructions to you as the author. Those have no button, because inserting them would damage the text. The top of the window tells you how many findings carry a replacement text.
Second, the passage has to still be there word for word. If you have revised the chapter since the check, EPOS cannot identify the spot beyond doubt and then deliberately writes nothing at all. Instead it tells you why. Across all measured runs this affects roughly a third of the suggestions. It is not a fault, it is proof that you kept writing.
Third, a backup is taken before every insertion. EPOS stores the state of your chapter before it changes anything, and verifies that backup afterwards. If the backup does not come through, nothing is written. Every single application can be undone, and a whole chapter can be reset to the state it had before the review.
Apply all exists too. Beforehand you see how many spots in which chapters are affected, and afterwards you can take the whole batch back with one click.
9. Analysis
The analysis tools look across chapter boundaries. They are second opinions, not a substitute for a reader.
Character consistency. Checks whether your characters contradict themselves, and files the characters it finds, with descriptions, in your character list. A second run adds what is new and leaves untouched what you entered yourself. Reads up to 50,000 characters of your manuscript, around 18,600 tokens per run on average.
Timelines and continuity. Looks across chapters for contradictions: details that change between chapters without the story explaining it. It works from automatic summaries of each chapter, then verifies suspicious candidates against the real chapter text. Around 31,500 tokens on average, considerably less or more depending on the length of your book. Studio.
Logic check. Looks for broken causality, motivation gaps, timeline errors and violations of your own world rules. Around 24,400 tokens per run. Studio, up to three runs per hour.
Tension arc. Charts how tension develops across your manuscript.
Foreshadowing assistant. Helps you plant a hint early that you want to pay off later. From Professional.
Each of these tools tells you after the run how much of your manuscript it actually read. If that is not 100 percent, it did not see the rest, and a contradiction in the unread part stays undiscovered.
10. World
Character workshop. Develops a single character further: psychological profile, background, relationships, motivation, depending on what you ask. Reads the name, description and stored traits of that character plus your question.
Worldbuilding. Settings, systems, history, magic, technology, social rules. EPOS reads the context of your manuscript along with it and saves the result by itself, no separate save click needed.
Project bible. Pulls an overview of your work out of your manuscript: characters, places, world rules, key facts. It is the reference book to your own book.
Genre expertise. Reviews your manuscript through the eyes of someone who knows your genre: its conventions, its traps, what readers expect. Seven genres are available. Some tools inside require Professional, and you can see that before you start.
11. Publishing
Synopsis generator. Asks you five questions: logline, plot, protagonist, antagonist, market position. From your answers it writes a synopsis in publishing form. Worth knowing: it works with your answers, not with your manuscript. You download the result as a Markdown file or copy it. It is shown in this session and cannot be called up again later in the publishing area, so save it.
Formatting assistant. Two tools, both free and without AI, everything runs in your browser. One cleans up typography: double spaces, spaces before punctuation, straight quotation marks turned typographic, three dots turned into an ellipsis. The other estimates your page count and compares it against the requirements of KDP, BoD, epubli, tredition, Apple Books and Google Play. Those requirements are as of May 2026, so check them once more with the platform before you submit.
Export. PDF, Word and EPUB, either the whole book or a single chapter. You pick the typeface and the options, then download the file. Export costs no tokens, it is pure format conversion. The PDF gets a table of contents from Studio upwards, the Word file gets one on every paid plan.
12. Autopilot
Autopilot gathers the tools around publication: the book scanner, the idea evaluator, the launch planner and the help scanner.
From Professional, the scans and evaluations are included without limit. The launch planner comes with Studio. The Starter plan does not include Autopilot.
13. Extras
Buy tokens. Five packages between 500,000 and 100 million tokens. Purchased tokens expire after one year. If moving up to the next plan would be cheaper for you than the package, EPOS says so before you buy.
Add-ons and packages. Individual functions can be bought separately instead of changing plan. Each card shows the plan from which the function is included anyway. If an add-on is not intended for your plan, you see that before you buy.
Invite friends. You get a link. If someone signs up through it, they receive a welcome credit immediately, and you receive your bonus once their first payment has gone through. If they move up later, another bonus follows. Your own bonus is capped at ten referrals per month.
AI detection and humanising. Checks how machine-like a text reads and, on request, rewrites it more naturally. Up to 50,000 characters for the check, up to 20,000 for the rewrite. Studio, or as an add-on.
14. Account, plan and security
The gear icon at the top right opens your account settings.
Name, email address and currency are yours to change there. For the email address you confirm with your password, and the new address receives a confirmation mail. Until you click it, the old one stays valid.
Change password and sign out on all devices sit in the security section. The second one is the right button if you suspect someone else has access to your account.
Two-factor sign-in. You can protect your sign-in with an authenticator app. EPOS shows you a QR code, you confirm with the six-digit code from the app, and then receive eight backup codes. Write them down. Each one works once and saves you if you lose access to your phone.
Your plan. You can see your plan, the price and the period. Changing plan, cancelling, revoking a cancellation and reactivating a cancelled subscription all happen there. After a cancellation you can keep working until 23:59 on the date shown, not only until the time of day you originally signed up.
Delete account. Final, with every project and chapter. There is no way back afterwards.
15. What things cost and how you stay in control
EPOS counts in tokens. One token is roughly half a word to a whole word, and everything that goes in and comes back out is counted.
Before every click that costs tokens, a window opens. It tells you what the function does, what it reads, what it has cost on average, and how much credit you currently have. Nothing runs until you confirm. For the spell check this window appears only once per session, because you need it often.
One sentence in there matters: the usage applies even if you do not like the result. The AI works the moment you click start, whether or not the answer helps you.
Free of charge: writing and saving, the formatting assistant, all three export formats, printing, the history, the review including applying and undoing, and calculating actual usage before an editing run.
The trial contains 10,000 tokens. That is enough to look around and for one or two smaller requests, not for working on a book. Spell check, sparring, characters and worldbuilding are open during the trial, editing and the synopsis generator are not.
16. What EPOS-AI cannot do
We could have left this section out. We are keeping it, because otherwise you lose time in the wrong place.
The continuity check does not find everything. In our own test, with a book into which we deliberately built ten contradictions, it found two to three of them. It rarely reports something that is not there, but it misses a lot. If it finds nothing, that does not mean your manuscript is clean. It does not replace a reader.
Applying in the review does not work everywhere. For about a third of the suggestions the text has changed since the check, and then EPOS deliberately inserts nothing.
Analyses do not always see your whole book. Every analysis tells you afterwards how much it read. Look at that number.
The synopsis generator does not know your manuscript. It works from your five answers.
The spell check knows German and English. The other languages in the dropdown have not been tuned separately yet.
17. When something goes wrong
The envelope at the top right reports a problem straight to us, along with where you were at the time. That is the fastest route.
For everything else there is the support chat at the bottom right.
And if text is missing: get in touch straight away and do not keep writing over it. We hold backups of your chapters, and the sooner we look, the cleaner the state we can restore.
