Using RoomSketch3D on the iPhone Duo
RoomSketch3D follows the iPhone Duo's fold. Open flat, the floor plan fills the big inner screen, upright or sideways. Half-open on a table, the plan sits on the upper half and Structural & Interior, Furnish, Materials and Symbols sit as tabs on the lower half. Closed, the editor's tools run down the side column so the plan gets the full height. Needs the iPhone app, version 1.1.0 or later.
RoomSketch3D supports the iPhone Duo. The app knows whether the phone is open flat, half-open or closed, and lays the floor plan editor out to suit each pose: the whole plan on the big inner screen, a laptop-style split when you stand it half-open on a table, and the tools down the side when it's closed. Every time you fold, unfold or turn the phone, the plan re-fits the screen, so you're never left looking at a corner of the house.
A big, unfolded screen suits floor planning in particular. A plan is a wide drawing full of small numbers: wall lengths, room sizes, the gap between a sofa and a coffee table. On a regular phone you're always zooming in to read one part and out again to see the whole. Apple lists the Duo's inner display at 7.6 inches (1878 × 2670 pixels) against 5.4 inches (1398 × 2034 pixels) for the outer display, about 1.8 times the pixels, so a whole apartment fits with its measurements readable, and there's room for the catalog without covering half the plan.
This page walks through each pose and what you'll see in it, what you need, what works in Safari, and a few habits that make the most of the extra space. It also says plainly what has and hasn't been tested: no one at RoomSketch3D owns a Duo yet, so the layouts were built and checked in Apple's iPhone Duo simulator.
What you'll need
- •An iPhone Duo with the RoomSketch3D app from the App Store, version 1.1.0 or later
- •Your RoomSketch3D account (the same one you use on the web or another phone)
In this guide
- 1
Update the app (1.1.0 or later)
Fold awareness came with version 1.1.0 of the iPhone app, and every later version keeps it. Open the App Store, tap your account picture, and update RoomSketch3D if it's listed. Sign in the same way you do everywhere else (Continue with Apple or Continue with Google, with the same email address) and every design and your purchase are there. Nothing about your designs changes: the Duo shows the same plans as your computer and other phones, and an edit on one appears on the others within seconds (see Use the same designs on web, iPhone and Android).
- 2
Open flat, held sideways: the whole plan on the big screen
Open the phone fully and hold it sideways (the way it naturally opens, like a small tablet). The editor fills the inner display edge to edge: the clock and battery step aside on this screen so the plan gets the space. You get the familiar phone layout, just bigger: the design name, Share / Export and Support along the top, the floor picker and Plan Settings under them, the toolbar, the plan, and Structural & Interior, Furnish, Materials and Symbols along the bottom. The single column is deliberate. A three-column desktop layout was tried at this size and measured: it left the plan only a little over half the space the single column gives it. On a floor planner the plan is the thing you came for, so it gets the room, and the panels slide up from the bottom only while you use them.
Open flat and sideways: the whole two-bedroom apartment with every measurement readable. - 3
Open flat, held upright
Turn the open phone upright and the editor turns with it; the plan re-fits the new shape straight away. Upright is the better way round for tall plans and for the Furnish and Materials sheets, which slide up from the bottom: the sheet takes the lower part and you still see most of the plan above it. The app turns to any way up except upside down while the phone is open.
Open and upright: the same plan, re-fitted to the taller screen. - 4
Half-open on a table: plan on top, catalog underneath
Stand the phone half-open on a table with the fold running across, like a small laptop. The plan moves to the upper half, and the lower half, the part lying flat under your hands, becomes a dock with tabs: Structural & Interior, Furnish, Materials and Symbols, with Furnish open first. Tap a tab and its items open right under the tabs; nothing pops up over the plan. Whatever you add appears on the plan above, so you can furnish a room the way you'd use a laptop: look up, tap down. The plan stops just above the fold and the tabs start just below it, so nothing you need to tap sits on the crease. To give the plan the most room, the design-name and floor rows are tucked away while the phone is half-open; the Exit fullscreen button at the right end of the toolbar brings them back (you need them to switch floors or rename the design), and they return by themselves when you open the phone flat. Two more tabs appear when they apply: Yard Zones when the plan has a yard, and on an outdoor floor Furnish reads Outdoor and Materials reads Ground. If a panel was open when you folded the phone, it carries on as the matching tab.
Half-open on a table: the plan on top, Furnish underneath, nothing covering the plan. - 5
Furnish and Materials in the dock
Furnish in the dock is packed tighter than the usual sheet so about twice as many pieces show at once: smaller cards, Indoor / Outdoor on the same row as the room types, and the search box and the size filter (All sizes, Small, Standard, Large) on one row. Tap a piece to add it to the plan above, then drag it into place on the plan (see Adding, moving, and arranging furniture). Materials opens on Surfaces with Flooring Material, Wall Paints and Ceiling Paints. In the dock the small plan of your rooms and a live 3D view of your pick sit side by side: tap a room on the small plan, and its floor appears in 3D next to it (Drag to look around); the choices are underneath. Picture Gallery and Tile Planner are the other two tabs, as on any phone.
Materials, half-open: pick a room on the small plan and see its floor in 3D beside it. - 6
Half-open like a book
Hold the phone half-open with the fold running up and down, like a book, and you get the same full-screen layout as when it's open flat: the plan spans both pages. It isn't split, because each page alone (about half of the screen's width) would make the plan and the panels narrower than on a regular phone. If a measurement you want to read lands on the fold, drag the plan a little to one side.
- 7
Closed: tools down the side, full height for the plan
Closed, you use the outer display, and the app works like on any iPhone, upright, with one difference. The outer screen is wide and short, and the system keeps a column down one side for the clock, battery and camera (Apple's guidelines move toolbars into that side column on the Duo for the same reason). RoomSketch3D puts its toolbar there too, under the clock: Layers, snapping, box select, the tape measure, Auto-furnish, sticky notes, undo and redo, View in 3D, elevation views, Fit room to view and fullscreen, top to bottom. That gives the plan the full height of the screen, and bars and panels stop at the column instead of sliding under the clock and battery. If you close the phone while it's sideways, the app goes back to upright on the outer screen. The full 3D view can still turn sideways while it's open, as on any iPhone.
Closed: the toolbar runs down the side column, so the plan keeps the full height. - 8
Fold, unfold or turn: the plan re-fits
Each time the screen changes shape (folding, unfolding, turning the phone, or sharing the screen with another app in Split View) the editor fits the whole plan to the new screen, exactly like opening the design fresh. If you were focused on one room, that room is fitted instead. Your zoom from before isn't kept: a view zoomed in for the big screen would leave the small screen showing a corner of a wall, so a clean fit is the better starting point. Pinch to zoom back in where you were working.
- 9
3D on the Duo
The full 3D view is one tap away in every pose: the cube button (View in 3D) on the toolbar. Open flat and sideways is the best way to walk through a room in 3D: it's the widest view you can get on a phone. The small 3D preview in the corner of the plan never opens by itself on the Duo (or on any other device); tap 3D preview when you want it. While the full 3D view is open, it takes the whole screen in every pose, including half-open; close it and the dock comes back. See Switching to 3D and walking through your home.
- 10
In Safari instead of the app
The editor at app.roomsketch3d.com works in Safari on the Duo too, with your account and designs. Because the layout follows the window's width, the open screen gets the same single-column layout. What Safari can't do is tell a web page how the phone is folded, so in Safari you don't get the half-open split, the side tool column when closed, or the automatic re-fit; tap Fit room to view on the toolbar after you fold or turn the phone. For the full Duo experience, use the app.
Tips
Draw open flat, furnish half-open
Walls, doors and measuring are easiest open flat and sideways, where the whole plan and its numbers fit at once. For furnishing, stand the phone half-open on a table: the catalog stays open under your thumbs and every piece lands on the plan above without a sheet in the way.
Closed for quick checks
In a furniture store or standing in the room, the closed phone is enough to check a space: open the design, tap the room, and use the tape measure from the side column. Unfold when you want to rearrange.
Bring back the floor picker when half-open
On a multi-floor plan, the floor picker is tucked away while the phone is half-open. Tap Exit fullscreen at the right end of the toolbar to show it, switch floors, then tap it again for the bigger plan.
Re-zoom after you fold
The fit after a fold shows the whole plan. Pinch out on the room you were working on. If you're working in a single room in focus mode, later folds fit that room instead of the whole floor.
Lock what's finished
Bigger screen, more confident drags. Once a wall length or a piece of furniture is where you want it, lock it so a stray touch on the large screen can't move it (see Lock wall lengths and furniture).
Common confusions
Running an old version of the app
Versions before 1.1.0 don't know about the fold: the inner screen shows the phone layout without the tabletop dock or the side tool column. Update from the App Store.
Expecting the half-open split in Safari
Safari doesn't tell web pages how the phone is folded, so the editor there can't split itself. Use the iPhone app for the Duo layouts; your designs are the same in both.
Looking for the dock during the guided tour
While the guided tour is running, the editor keeps the usual phone layout, because the tour points at the bottom buttons and their panels. Finish or close the tour and the dock appears when the phone is half-open.
Expecting the plan to keep its zoom through a fold
It re-fits on purpose, so the plan is never left off-centre on the smaller screen. Pinch back in where you were working.
Waiting for the 3D preview to appear
It doesn't open by itself. Tap 3D preview on the plan, or the cube button on the toolbar for the full 3D view.
Frequently asked questions
Does RoomSketch3D work on the iPhone Duo?
Yes. The iPhone app (version 1.1.0 or later) follows the fold: the plan fills the open screen upright or sideways, half-open on a table the plan sits on the upper half with Structural & Interior, Furnish, Materials and Symbols as tabs on the lower half, and closed the toolbar moves into the side column so the plan gets the full height.
Is there a tabletop mode?
Yes. Stand the phone half-open on a table with the fold running across: the floor plan moves to the upper half and the catalog, materials, building tools and symbols open as tabs on the lower half, with nothing popping up over the plan.
Can I use RoomSketch3D on the outer screen?
Yes. Closed, it works like on any iPhone, with the editor's tools in the column beside the clock so the plan uses the full height of the screen.
Does it work in Safari on the iPhone Duo?
Yes, the editor at app.roomsketch3d.com runs in Safari with the same single-column layout on the open screen. Safari doesn't tell web pages how the phone is folded, so the half-open split, the side tool column and the automatic re-fit are only in the app.
Do I have to buy RoomSketch3D again for my iPhone Duo?
No. It's a one-time purchase of $19.99 on the web (the App Store shows its price in your local currency), not a subscription, and it belongs to your account. Sign in on the Duo with the same email address you used before and it's unlocked, with all your designs.
Will buttons sit on the fold?
Not when the phone is half-open with the fold running across: the plan stops just above the crease and the tabs start just below it. Half-open like a book, the plan spans both pages, so drag it a little if a number you want to read is on the fold.
Has this been tested on a real iPhone Duo?
It was built and tested in Apple's iPhone Duo simulator in Xcode, which reproduces the inner and outer displays and the fold. Real devices can report the crease and the half-open angle slightly differently from the simulator; if something looks off in a pose on your phone, tap Support (the ? button at the top of the editor) → Report a bug and say which pose it was; a screenshot helps.
What about other foldable phones?
The layouts on this page are built and tested for the iPhone Duo. On other foldables, RoomSketch3D adapts to the screen size the way it does on any phone or tablet.
Can I still use AR Scan and AI renders on the Duo?
The Duo runs the same iPhone app, so the same features are there: AR Scan on Home, Share / Export, Photorealistic AI Renders and everything in the editor. See the iPhone & iPad app guide for what's in the app and what's on the web.
Sources
- Apple Human Interface Guidelines — Designing for iPhone Duo — Device poses (partially folded like a book, placed on a surface), the folding region that divides the inner display when partially open, and toolbars moving to the side column on the outer display.
- Apple — iPhone Duo Technical Specifications — Inner display 7.6-inch, 1878 × 2670 pixels at 430 ppi; outer display 5.4-inch, 1398 × 2034 pixels at 460 ppi.
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