Paste or open the text
Paste a draft, or open a Word, .txt, .md or .html file and scan the writing on your computer.
Handpress: AssayTM
Windows desktop app
Worried your draft reads like AI wrote it?
AssayTM is an AI writing checker for your own drafts. It points to exact phrases, explains the pattern and leaves the judgement to you. You see findings, not an AI percentage or a verdict about who wrote the text.
Buy once. Fix AI habits forever. One year of updates included. Optional updates after that cost £25 a year. 14-day money-back guarantee.
Handpress: Assay
Findings
Review the evidence, then decideGeneric opener
"In today's fast-paced world"
Starts with a broad scene-setting phrase before reaching the subject.
Abstract promise
"unlock your full potential"
Makes a promise without saying what will change in practice.
Stock transition
"With that in mind"
Links the paragraphs without adding useful meaning.
Windows now
Shows exact phrases
No AI score
Offline by default
What AI slop looks like
The telltale signs are in the words, not a score.
Padded openings, stock transitions, abstract promises and phrases that could belong to anyone. If you've ever wondered whether your own writing sounds like AI, this is what to look for. Assay shows you the exact words, their context and the reason they were flagged.
One finding at a time
AssayTM finds the cue. You make the call.
Keep the wording when it sounds right. Change it when it feels borrowed, vague or unlike you. Assay cannot replace your ear for your own voice.
What you can do
Let the software search. Keep the human opinion.
Assay finds familiar machine-writing patterns. You decide what sounds right, what sounds like you and what needs another pass.
See the exact phrase
Every finding names the wording and shows it in context, so you know where to look.
Read the reason
Assay explains the recognisable pattern instead of hiding the result behind a score.
Follow your gut
Accept, ignore or edit each finding. A flagged phrase is something to inspect, not an order to change it.
Copy a focused prompt
Take a prompt back to your AI chat when you want help revising the specific issues found.
Save the findings
Keep a report, or save a findings file that Handpress can open beside the document.
Anti-slop
Find the lines that feel like AI slop. Keep the ones that still sound like you.
Anti-slop, for work somebody is paying for. You don't need another blind rewrite of the whole draft.
Run the scan
Assay looks for recognisable wording and structures across the text.
Trust your gut
Read the phrase, its context and the reason it was flagged. Decide whether it sounds like you.
Take the next step
Edit it yourself, copy a focused prompt, save a report or load the review beside the matching HTML in Handpress.
Prompt injection scanner
Some documents carry text you cannot see.
Somebody sends you a file. Between its words there can be characters that show as nothing on screen, put there for whatever AI tool you paste the file into. Assay has a separate tab that goes looking for them.
Buried instructions
There is a part of Unicode that renders as nothing at all and can still spell out a sentence. Assay decodes it back into readable text and shows you what it says.
Split words
A zero width character wedged inside a word. You read one word. Software reads two, and a filter looking for that word never finds it.
Lookalike letters
A Cyrillic o sitting in an English word. Assay names the character instead of printing the word back at you, because a word that looks correct tells you nothing.
Reordered lines
Marks that flip the direction of the text, so the line on your screen is not the line in the file.
It reads characters rather than words, so it works on a document in any language. It opens Word, HTML, Markdown and plain text, it runs on your own machine, and it costs no credits.
An important limit
It reports findings, not a verdict.
Human writers use formulas too. Assay looks for recognisable machine-writing patterns. It can't determine who wrote the text, and it doesn't try to.
What a finding means
The wording reads like a pattern Assay recognises. Read the phrase and decide whether it serves the reader.
What Assay can't tell you
Assay can't tell you whether AI or a person wrote the text. It only shows you what to review.
You decide what gets sent
The free scan never leaves your computer.
Every rule, the prompt injection scan and the hidden character check run on your own machine. The AI pass is the only part that sends your writing anywhere. It runs when you spend a credit on it, and not before.
What the AI pass sends
Your text goes to our server and on to Anthropic to be read. It is not kept. What the server stores is the finding count, the timing and how many credits you spent, never your words.
Buy Handpress: AssayTM
The complete Windows app for £50.
Pay once. Never get flagged again. Keep the version you bought. It arrives with 250 credits for the AI pass, and the free scan never uses any.
- Full Handpress: AssayTM Windows app
- 250 AI scan credits, with no expiry date
- A scan of up to 2,000 words uses two credits: one for the findings, one for the general observations
- The free scan is unlimited and uses no credits
- One year of product updates
- Optional renewal at £25 a year, which buys updates and not new credits
- More credits any time from inside Assay: 150 for £12.50
- The app keeps working without renewal
- 14-day money-back guarantee
Before you choose
The Hand & Eye bundle is £70.
For £20 more, the bundle adds HandpressTM so you can rewrite in your own voice, personalise the pages and produce the PDF.
Compare the bundleHandpress: AssayTM
Questions & Answers
Paste writing directly, or open a Word document (.docx), or a .txt, .md, .markdown, .html or .htm file. With Word, Markdown and HTML, Assay scans the words a reader sees rather than the formatting behind them. PDFs it cannot open, so paste the text across instead.
Use the Handpress handoff when the writing belongs inside a styled HTML document, especially something heading for print or PDF. Save the .assay.json review file, open the matching HTML document in Handpress and load the review beside it.
Assay only needs the words. Handpress needs an HTML document containing those words, together with its structure and styling. For a social post, email or other plain-text item, use Assay's report or prompt and edit the text where it belongs.
No. It finds recognisable patterns and wording that reads as machine-written. It shows the evidence and leaves the judgement to you.
No. Assay does not give you an AI percentage, probability or risk score. It shows specific findings you can inspect.
No. You can edit the writing yourself or copy a focused prompt back to your AI chat. Assay does not replace your text automatically.
No. Assay works independently. Handpress is for HTML documents that also need editing, page control or a finished PDF.
Windows now. Mac coming soon.
The free scan, the prompt injection scan and the hidden character check keep working, because they never use credits. To buy more, press Buy more credits beside your balance in Assay. It is 150 credits for £12.50, added to the key you already have, and Assay warns you before you run short.
No. You'll never need a paid account with ChatGPT, Claude or any other AI company. Assay credits are separate. You buy them directly from us and they only work inside Assay. They cannot be used in any other AI software. The free scan, the prompt injection scan and the hidden character check need no credits at all. They are free tools inside of Assay.
Assay points to the exact phrases in your own draft, things like "in today's fast-paced world" or "unlock your full potential", and names the pattern. You decide what to change.
Padded openings, stock transitions such as "with that in mind", and promises that never say what will actually change. Assay shows you where each one sits in the text.
No. Assay does not train or adjust any AI model. It reads text you already wrote and shows which phrases match a known pattern.
Handpress: AssayTM
Find what feels machine-written. Finish it with human judgement.
Buy once. Fix AI habits forever. Review the phrase, trust your own voice and decide what to change. Handpress: AssayTM costs £50 once.
Buy Handpress: AssayTM - £5014-day money-back guarantee.