The canvas that carries on past the edge of the screen
Apps with no page size at all, where the screen is a window onto something larger — and where a bigger window is not a nicety but the entire interaction.
An infinite canvas is a strange thing to put on a phone. The canvas has no edges, so the only limit on how much of your work you can see is the glass, and on a folded phone the glass is small enough that the answer is usually "this bit". You end up navigating a space you are meant to be thinking in, and pinching to zoom out is not the same as seeing.
These are the apps where that trade is sharpest: whiteboards, vector sketchbooks, diagramming tools, mind maps. None of them gains a feature when the phone opens. What they gain is the thing they were designed around — enough visible canvas that the relationship between two parts of a drawing is something you look at rather than something you reconstruct.
Every one of them declares a tablet layout, which is the check this site runs before anything else, and in this category that check is unusually meaningful: an infinite-canvas app with no tablet layout has been designed for the window it was never going to get.
- 1
Concepts
TopHatch, Inc.
A vector sketchbook on an infinite canvas, where every stroke stays editable rather than being baked into pixels. Editable strokes are only useful if you can find the one you want to change, and finding it on a folded phone means zooming out until it is too small to select and back in until the context is gone.
- 2
Freeform
Apple Distribution International
A board that takes almost any kind of file — sketches, documents, images, links — dropped anywhere on it, and supports other people being on the same board at the same time. The arrangement is the content here, which makes visible area the feature, and a board you can only read in sections is a board you have to hold in your head.
- 3
Goodnotes: AI Notes, Docs, PDF
Notes & PDFs · Goodnotes Limited
The whiteboard and diagramming side rather than the page side: an infinite canvas that grows as the notes do, for brainstorming and mind-mapping. A mind map that outruns the screen in its first minute is a mind map you are scrolling rather than reading.
- 4
OmniGraffle 3
The Omni Group
Diagrams, wireframes and layouts, with a stencil library behind them — work where the whole point is how the boxes relate to each other. The listing's own framing is that the screen is your paper and your whiteboard, and a bigger sheet of paper is exactly what that framing asks for.
- 5
Infinite Painter
Sean Brakefield
Layers, grouping and a deep brush set, aimed at painting rather than sketching. The canvas is the work, and the proportion of it you can see while making a stroke is the proportion of the composition you are actually judging that stroke against.
- 6
Sketchbook®
Sketchbook, Inc.
Guides, rulers, symmetry and a brush set built to behave like its physical equivalents. Drawing straight is a function of how much of the line is in front of you; so is deciding whether the line belongs there.
- 7
Figma
Figma, Inc.
The mobile app is for reviewing, commenting and playing prototypes rather than for building, and all three are reading tasks. A prototype played full screen on a wider display is nearer the thing being prototyped, and a comment thread beside the frame it is about is a conversation rather than two views.
The selection and the order are ours. Each entry is written from that app’s own App Store listing, linked beside it, and this page from Apple's iPhone Duo product page. Drafted with AI assistance and checked back against those sources before publishing; the disclosure page explains how. The iPhone Duo has been on sale since 23 October 2026 and nothing here has been seen running on one, so what each entry says about the fold is an argument rather than a test.