SUBPLOT TRACKER
Every thread,
visible at once.
Lay each subplot out as its own line across the whole story, mark where it is planted, developed, and paid off, and find the thread you quietly abandoned in chapter nine. Storyflow is paid-only during early access, with plans from $9.99 a month, and a Free plan launches before the end of 2026.
Plans from $9.99/mo
Free plan coming late 2026
Works in your browser
Used by creative professionals at:
Artlist
Pixar
Nike
Red Bull
The North Face
Porsche
Start from a ready-made template
Pick a board to see what you can build, then let AI fill it in. Every template is a real, editable starting point on the same infinite canvas.
Story Plan
Outline your plot, characters, and world in one connected view, then expand each thread as the story grows.
What is a subplot tracker?
A subplot tracker is a view of a story organized by thread rather than by chapter. Instead of reading top to bottom through the sequence of scenes, you lay every storyline out as its own horizontal line running the length of the narrative, and mark the points where it is planted, developed, complicated, and resolved. The romance is one line. The mystery is another. The protagonist's relationship with their father is a third. Read across a line and you see one story arc in isolation; read down a column and you see what any given chapter is actually carrying.
The reason this view matters is that the failures of a subplot are almost invisible in a manuscript. A thread that is planted with great care in chapter two and never mentioned again does not announce itself, because every individual chapter reads fine. A thread that resolves at the midpoint leaves the second half quietly flat, and the note you get back from readers is that the ending felt rushed, which is the wrong diagnosis for a problem that happened two hundred pages earlier. A thread that only ever appears in scenes with one character will feel, to a reader, like a different book bolted on. None of these are sentence-level problems, and none of them are findable by rereading.
Storyflow is an AI-native infinite canvas built for this. Describe the story and its threads in a prompt and the AI lays out a structured board: a line per subplot, chapter or act markers running across, and cards for the beats you already know. Then you work spatially. Give each thread a colour, drop a card at every point where it moves, mark the plant and the payoff explicitly, and stretch the whole thing across as much canvas as the story needs rather than compressing it into a table that stops being readable at four threads.
The tracker is most useful at two moments. Before drafting, it tells you whether you actually have a book or a main plot with three decorations attached: threads with a plant and no payoff, or with no complication in the middle, are visible before you write a word of them. After drafting, it tells you what you really wrote, which is reliably not what you planned. Both passes are cheap on a canvas. Neither is possible in a manuscript, because a manuscript can only be read in one order and the thread view is a different order entirely.
HOW IT WORKS
From a tangle of storylines to threads you can read.
No spreadsheet that breaks at four threads, no outline that stops matching the draft.
01
Open a canvas
Sign up in seconds, from $9.99 a month. No download. Your infinite story canvas opens in the browser.
02
Name the threads
Describe the story and its storylines and the AI lays out a line per thread with act or chapter markers across, plus cards for the beats you have already decided.
03
Mark plant, development, and payoff
Drop a card wherever a thread moves and tag it as a plant, a complication, or a resolution. The threads with holes in the middle become visible immediately.
04
Fix the shape before you write it
Drag beats along a thread to move a payoff later or a plant earlier, then share a view-only link with an editor or writing partner for structural notes.
Read the story sideways.
One line per thread, the whole narrative in view.
AI lays out the threads from your description
Start from a structure, not a blank board
Describe the story and its storylines and the AI builds a line per thread with act markers and starter beats. You begin by arguing with a proposal instead of staring at nothing.
See the AI story outline generator →
Plants and payoffs marked explicitly
Find the thread with no ending
Tag every beat as a plant, a complication, or a payoff. A thread with three plants and no payoff is the single most common structural fault in a first novel, and it takes ten seconds to spot here.
Explore the story planning tool →
See what each chapter is carrying
Read down as well as across
A vertical slice shows every thread live in a given chapter. Three threads all resolving in the same chapter is a traffic jam, and a chapter carrying nothing but the main plot may be why the middle sags.
See the chapter outline maker →
Characters and world beside the threads
Keep the cast next to the arcs they carry
Pin character boards beside the threads that belong to them. A subplot is usually a character wanting something, and it is far easier to test whether it works with that person in view.
See the character relationship map →Unlimited boards. No object cap.
Open a canvas, name your threads, and lay them across the story. Storyflow is paid-only during early access, with plans from $9.99 a month, and a Free plan launches before the end of 2026.
Unlimited story boards on an infinite canvas
Basic AI usage to generate outlines and threads from prompts
Starter templates for story plans, outlines, and beat sheets
Share view-only links with editors and writing partners
BUILT FOR MULTI-THREAD STORIES
More than a column in a spreadsheet.
A spreadsheet can list your threads. It cannot show you the one with a hole in the middle.
Plant, develop, complicate, resolve
Give every thread a full shape
The plant, and how quiet it is: Mark where the thread first appears and note how visible it is. A plant nobody registers is not a plant, it is a coincidence you will be accused of when it pays off.
Development in the middle: Threads fail in the middle far more often than at either end. A line with a plant, a gap of forty pages, and a resolution is the shape of a subplot readers experience as arbitrary.
A complication that costs something: Mark the point where the thread gets harder. Subplots that only ever progress feel decorative, because nothing in them is ever in doubt.
A payoff in the right place: Note where the thread lands and check it against the others. Everything resolving in the final chapter is exhausting, and everything resolving before it is why a third act can feel like an epilogue.
AI that can see the board you have already built
Work the threads with an AI that knows the story
Prompt against the whole canvas: Ask it where a thread could be complicated, what a neglected storyline might need in act two, or to lay out a new thread across the existing structure. It reads the board you have built.
It structures, it does not ghostwrite: Storyflow organizes and lays out the story. The writing stays yours, which is the only part of this that readers actually encounter.
Iterate without losing work: Re-prompt as often as you want. Beats you have already placed and tagged stay exactly where they are while the AI builds around them.
Threads across a series
Plan arcs that run longer than one book
One canvas, several books: Run the thread lines across multiple books or seasons so a plant in book one has a visible destination rather than a hopeful note in a file you will not open again.
Season and volume markers: Mark the boundaries and check that each instalment has its own satisfying arc as well as advancing the long one. Serials fail when every book is middle.
The promise ledger: Keep a visible list of the questions you have raised and where each is answered. Long stories lose readers by accumulating unanswered promises far more often than by any single weak chapter.
Editors, co-writers, and writers rooms
Talk about structure with something to point at
View-only links, no account required: Send an editor or a writing partner a link and they see every thread in a browser with no signup. Structural conversations get much shorter when both people are looking at the same lines.
Comments on the beat itself: Notes attach to the specific beat they concern, so feedback about a thread stops being a general worry and becomes a point on a line you can move.
Two arrangements, side by side: Keep an alternative version of a thread in another region of the canvas. Deciding whether the payoff belongs in chapter nineteen or twenty-four is much easier when both versions are visible.
Explore templates for your project
Every template opens as a real, editable board on the infinite canvas. Pick the closest fit and make it your own.
Story Plan
Outline your plot, characters, and world in one connected view, then expand each thread as the story grows.
HOW WE COMPARE
Storyflow vs Scrivener, Plottr, and a spreadsheet.
Be clear about what Storyflow is. It does not compile a manuscript and it does not do screenplay formatting. It is where the shape of a multi-thread story gets worked out.
Storyflow
Recommended
Infinite canvas with a line per thread
AI lays out threads from a story description
Characters, research, and images on the same canvas
Manuscript compile and ebook export
Dedicated timeline software features
Free plan available today
Scrivener
Infinite canvas with a line per thread
AI lays out threads from a story description
Characters, research, and images on the same canvas
Manuscript compile and ebook export
Dedicated timeline software features
Free plan available today
Plottr
Infinite canvas with a line per thread
AI lays out threads from a story description
Characters, research, and images on the same canvas
Manuscript compile and ebook export
Dedicated timeline software features
Free plan available today
Spreadsheet
Infinite canvas with a line per thread
AI lays out threads from a story description
Characters, research, and images on the same canvas
Manuscript compile and ebook export
Dedicated timeline software features
Free plan available today
What creators are saying
Join early creators getting structured workspaces and AI that remembers their projects
“Storyflow has sped up my workflow by at least 3x, which means more flow state and more projects I can actually ship. It truly changed the way me and my team create.”
Reilin Joey
Director & YouTuber
“One prompt gets me a structured board. But the tactics are my favorite. I run my YouTube scripts through them and my intros and retention got better. It's amazing.”
Justkay
YouTuber & Freelance Filmmaker
“I used to juggle five apps to plan a project. Now I describe what I am making and get boards, lists, and a schedule. All in one place.”
George
@fernwehchronicles
Subplot questions, answered.
How many threads a story can carry, how to spot a dead one, and where Storyflow fits alongside your writing app.
Plottr is the dedicated answer and it is genuinely good at exactly this, with timeline lines per thread and a well-worn workflow. Scrivener can do it with labels and collections, though the thread view is something you assemble rather than something you see. A spreadsheet works and costs nothing, right up to the point where you have five threads and sixty chapters and the grid becomes unreadable. Storyflow is the canvas version: a line per thread across an infinite surface, beats tagged as plant, complication, and payoff, character boards pinned beside the arcs they carry, and an AI that will lay the first draft of the structure out from a description of the story.
Find the thread you abandoned in chapter nine.
Open a canvas, name your storylines, and let AI lay the threads out. Plans from $9.99/month, no download, and a Free plan is coming before the end of 2026.