How Desloppy learns your voice without keeping your words
Sign in and Desloppy learns how you write. It keeps a few numbers. Here is exactly which numbers, where they come from, and what they can never do.
Since 21 October 2026 Desloppy can learn your writing voice. Once it knows your voice, your AI follows it when it fixes your text. Short sentences stay short. Contractions stay in, or stay out. Your sign-off stays yours. The feature raises an obvious question. What does Desloppy keep about you to do that? The answer is a few numbers, and this post lists all of them.
The numbers it keeps
For each account, Desloppy keeps running counts of a few style measures. This is the full list.
- How many words and sentences it has seen, and the sentence lengths, so it can work out your average sentence length and how much your sentences vary. It also counts short sentences of 8 words or fewer and long ones of 25 words or more.
- How often you use contractions, like don't and it's.
- How often you write in the first person: I, me, my.
- How many question marks and exclamation marks you use.
- How many long dashes and emoji you use.
- Whether you spell colour or color, organise or organize.
- In emails, which greeting and which sign-off you use, from a fixed list. The greetings are good morning, hello, hey, dear and hi. The sign-offs are best regards, kind regards, warm regards, thank you, thanks, cheers, regards and best.
That is everything. None of these counts can rebuild a sentence you wrote. A count of question marks is a number, and a number holds no words. Any new measure we add has to pass the same test: it must be unable to rebuild text.
Where the writing comes from
Desloppy learns only from writing you confirm is yours. It never guesses. There are three ways to confirm.
- You tell your assistant a text is yours, as in "check my essay" or "I wrote this". The assistant passes that along with the check. In the Desloppy card you can also tap "Yes, train my Desloppy".
- Your assistant asks, once per chat, whether Desloppy can learn from the messages you type there. If you say yes, it sends your own messages. Never its replies, never an AI draft, never a rewrite.
- You paste text into "Train my Desloppy" on your account page.
An earlier version learned from any checked text that scored low. That was a mistake. A text you check is often a colleague's draft or a chatbot's, and Desloppy could have learned their voice as yours. So we changed it. Now a text counts only when you say it is yours.
What gets skipped, even when you confirm it
Some texts are skipped even after you confirm them, and the card tells you when that happens. A text under 15 words says too little about a voice. A text in a language other than English is skipped, because Desloppy checks English only for now. And a text that reads like a chatbot is skipped, because it would bend your voice toward the default AI sound. That rule also means a rewrite or an AI draft never counts, whatever you call it. A before-and-after compare never teaches anything.
One text counts once
Desloppy keeps a short one-way fingerprint of each text it learned from. The fingerprint is 16 characters made from the text's words. It can tell that the same text came back. It can never be turned back into the text. Desloppy keeps the last 500 fingerprints, so checking the same message twice never counts it twice.
When it starts applying your voice
Until Desloppy has 3 of your texts and 500 of your words, every check says it is still learning your voice, and how far along it is. From then on it says "Applying your voice" and gives your assistant a short set of measured rules. With your own numbers filled in, the rules read like this: keep sentences short, this writer averages 12 words a sentence. Use contractions, this writer uses them often. Avoid long dashes, this writer doesn't use them. Use UK spelling. In emails this writer opens with "Hi" and signs off with "Thanks". Each rule appears only when your counts back it up. Keep training it and the rules get closer to how you write.
What it can't see
Desloppy can't read your other chats. Inside Claude or ChatGPT, a tool like Desloppy sees only the text your assistant sends to it. The text you check is handled in memory and dropped as soon as the result is sent. It is never stored and never used to train the detection model. The voice numbers are the only thing that lasts.
Your switches
On your account page you can turn voice learning off. Checks still work, and nothing new is counted. You can also tap "Forget my voice", which deletes the numbers at once. If you turned learning off before forgetting, it stays off. All of this is written down in the privacy policy, in the same plain words.
Signing in gives you 5,000 free words and lets Desloppy learn your voice. Confirm a few texts, then see what your assistant does differently. Start at desloppy.com.