He remembers what you said in chapter two. Try the first line.

Tired of the filter killing the kiss? Slowburn is written for adults, and it remembers.

Slowburn is interactive romance that lasts. Pick someone, write the opening, and see how it feels. Then imagine chapter forty.

Adults only, 18+
Hosted in the EU
Never used for training
No streaks, no guilt trips

Step one · who are you writing with tonight?

RRafael, 45Architect who builds for the light. Widowed four years, and finished being careful about it.Begin in the app

HHana, 33Literary translator who lives between languages. Precise, playful, and off duty as of tonight.Begin in the app

SSaoirse, 42Large-animal vet on the west coast. Competent to a fault, and off duty for the first time in years.Begin in the app

MMarguerite, 56Left the stage at the height of it. Elegant, wicked, and extremely bored of being admired.Begin in the app

Five of the nine have a scene you can try here. Meet all nine — where they live, what they want, how each story opens.

That was one line. Slowburn keeps thousands — and brings them back when it matters. Join the free beta or try another opening.

Join the free beta How it works Free for the first 50 readers. No card, no waiting list.

How it works

Sign in with a link.Your email, no password, no card.
Pick who you're writing with.Nine characters, aged 26 to 56, each written before you ever meet them.
Write the first line.The story remembers — from that line to chapter forty.

What Slowburn is

You choose one of nine characters, aged 26 to 56 — one story each, written for you. Then you read and write together, a few messages at a time, over weeks and months. The character remembers what you shared — names, moods, the thing you almost said — and the story bends around it.

Not a chatbot with a persona pasted on. Not a dating sim with a progress bar. A novel being written for exactly one reader.

Memory that holds.A detail from chapter two comes back in chapter forty without you reminding anyone.
Memory you can read — and edit.Open “Memory & boundaries” in any story and see exactly what the character remembers about you. Add a fact in your own words, or forget one, and the story changes with it. Nothing is hidden behind the page.
Private by design.Hosted in the EU. Your stories are never used for training, never shown to other readers, deleted when you ask.
Written for adults.Grown-up relationships, grown-up pacing — and grown-up heat, when the story earns it. Slowburn is 18+. Every character is a fictional adult; we never portray real people.
Free to leave.No streaks, no countdowns, no “don't go” messages when you close the book. A 2025 Harvard Business School study found guilt and FOMO in a large share of companion-app farewells; Slowburn has none of it by design. The story waits — it doesn't pull.
You hold the pen too.Rewrite a reply you don't like and keep every version. Undo your last line. Have any reply read aloud. Set boundaries for each story, and tell the characters who you are in your “You” profile.

What readers asked for

Three complaints come up again and again when people explain why they left the big character apps. Here is where Slowburn stands on each.

The filter keeps interrupting the scene.Heat that follows your lead. Slowburn is written for adults: the story goes as far as you and the character choose, within the boundaries you set — not a switch that flips mid-kiss.
Goldfish memory. It forgets my name by the third night.Memory you can read and edit. Open “Memory & boundaries” in any story to see what the character holds about you, add to it, or take something out.
Every reply sounds the same after a while.Rewrite, versions, and no loops. Rewrite any reply and keep every version, undo your last line, and the prose is checked against repeating itself so the story keeps moving.

The beta is open

Fifty free places while we get it right. Sign in with your email — no password, no card — and start a story tonight. If something reads wrong, feels off, or forgets, tell us: that's what the beta is for.

Free · first 50 readers

All stories, unlimited chapters, and every character we add during the beta. Room to write 400 messages a day.

New in the beta: nine characters, replies that stream in as they're written, Rewrite with versions, Undo, a “You” profile the characters read, memory you can edit, and voice notes.

Open Slowburn

€3.90 / monthTest-period price. Every story, every character, 400 messages a day, voice notes included. Rises to €9.90 for new readers when the test period ends; the price you joined at stays yours for twelve months from the day you join.

€29 / first yearFounding reader: the founding price stays yours for twelve months from the day you join, and you get a say in which stories we write next. Payment is open during the test period.

Before any price changes for you, we email you at least 30 days ahead. No credits, no paywalled chapters, and nothing held back on any plan: intimacy, memory and the characters' heat are never sold back to you in pieces. Card payments are handled by Stripe, and we never see your card number.

Questions people ask

Is this explicit?

Slowburn is romance for adults, and we don't pretend otherwise. Stories become as intimate as you and the character choose — you set the pace and the boundaries for your own story from the first chapter, and the character meets you where you are.

Who writes the characters?

We write the opening stories and characters in-house. Every character is an adult and fictional — no real people, no likenesses, no exceptions.

How do you verify age?

You confirm you're 18 or older when you sign in, and we keep a record of that confirmation — the date, not a document. We do not use a third-party age-verification provider today. If the country you live in starts requiring one, we will add it and say so here before it applies to you. We will never ask you to upload a passport or a selfie to us.

Is this written by AI?

Yes — and we would rather say so plainly. The prose, the voices and the portraits are generated by artificial intelligence, steered by writing we do by hand: each of the nine characters is written here, with a sheet of their own, before you ever meet them. Nothing you read is a real person, and nothing you write is used to train a model.

Where does my data live?

On servers in the EU. Your stories are not used to train models, not visible to other readers, and deleted when you ask.

What happens after the beta?

Beta readers are offered founding places first, then the list, then the door. We'd rather open to 200 people who love it than 20,000 who shrug.

More — languages, price, memory, deleting everything, and how this differs from the big character apps — on the questions page.