Noumenal is a beautiful and easy way to create 3D shapes.

Five Minute Demo

How to Connect

Join the Noumenal Discord and the Noumenal Reddit for help, updates, and to show off your models!

How to Use the App

This is the main screen. You will work with shapes in the main area of the screen, called the stage. The strips to the left and bottom of the screen are called bars. The bottom bar is called the stack. You will use this bar to store and group intermediate shapes. The left bar is called the shelf. You will use this bar to store a collection of components that you may need to copy. It will always contain primitive shapes, as well as any shapes you place there. Separating the stack and shelf from the stage is a gray ribbon containing several buttons. The name of the current stage and the last touched shape is displayed above this ribbon on the bottom.

The Shelf and Stack Bars

You will use the shelf and the stack bars to hold parts of your shape as you build it. The stack is for temporary storage, while the shelf can be used to build a collection of reusable components.

Pulling a shape from the stack.

Rings are drawn on the screen to show where fingers make contact with shapes. Large dots show contact with the background. If you lift a finger, they become a small dot, which acts as an anchor, until all fingers are lifted.

Place a shape in a bar by dragging the shape from the stage to the edge of the screen where the bar lies. Dragging several shapes together will group them as one shape, and they can be ungrouped again by tapping the grouped shape in the bar. You can scroll through the shapes in a bar by moving shapes side to side.

The Stage: Moving a Shape

Shapes in the stage can be moved using one, two, or three fingers. Using more fingers lets you move the shape in more ways.

With one finger, you can move a shape left, right, up, and down.

Movement of an shape with one finger.

With two fingers, you can also spin shapes around, move them torward or away from you, or change the size (in scaling mode).

Movement of an shape with two fingers.

Shapes will move in and out of the screen when not in scaling mode.

Movement in and out of the screen.

Shapes will change size when in scaling mode.

Changing the size of a shape.

With three fingers, you can also spin shapes into and out of the screen. This takes some practice, but keeping two fingers still and moving the other will spin the shape around the line between the two still fingers. Using both hands (two fingers on one hand, one on the other) may help.

Movement of an shape with three fingers.

Tapping and then dragging a shape will also allow moving a shape torward and away.

Moving a shape by tapping and dragging with one finger.

When using two taps, a fixed contact is added, also shown as a ring.

In scaling mode, a tap and drag will stretch a shape in one direction.

Stretching a shape by tapping and dragging with one finger in scaling mode.

Also, you can tap once quickly before using two fingers to spin a shape around its center.

Pivoting an shape by tapping and dragging with two fingers.

Removing a Shape from a Bar

If you want to get rid of a shape in the shelf or the stack, pull it to the nearest edge of the screen and hold for a second until it is removed.

Throwing a shape away.

Moving the World

Touching more than one shape or the black background at the same time will move all shapes (the world) together.

To move the world with one finger, use it to touch a shape at the same time that you touch the background with a second finger, and then release the second finger. You can move all shapes left, right, up and down. Alternatively, you can drag the background with one finger.

Movement of the world with one finger.

To move the world with two fingers, use them to touch multiple shapes at once, or use a third to touch and release the background. You can also spin the world, or move it closer or further from you, or change sizes (in scaling mode). Alternatively, you can use two fingers on the black background to move, rotate, and change sizes (in scaling mode).

Movement of the world with two fingers.

To move the world with three fingers, use them to touch multiple shapes at once, or use a fourth finger to touch and release the background. You can spin into and out of the screen.

Movement of the world with three fingers.

A quick tap before using two fingers to move the world will allow you to spin around the center of the closest shape.

Pivoting the world by tapping and dragging with two fingers.

Combining Shapes

Shapes can be combined to make new ones. There are three different ways to combine shapes. Quickly tap a shape twice to change how it will combine with others.

The first way to combine a shape is to add it to other shapes. A shape in this mode is called a positive shape.

Sticking shapes together.

The second way to combine a shape is to remove it from other shapes. This will create a hole the size of that shape. A shape in this mode is called a negative shape.

Removing one shape from other shapes.

The third way to combine a shape is to keep only the parts of other shapes that are inside it, trimming away everything on the outside. A shape in this mode is called a clipping shape.

Keeping only parts inside a shape.


There are a number of buttons. Some toggle specific modes, while others perform actions when touched. These will light up when active, or fade when disabled.

Rotate to the view shown in the depth camera, orthogonal to the current view.
Return to the state before the last action. Pressing it repeatedly will move to earlier states.
Move to later states after using the "Undo" button.
Scaling Mode
In this mode, pinching changes the size of shapes rather than distance from the camera.
Mirror Tool
When this is selected, any shape you touch will be copied and flipped across the contact plane.
This will align shapes by rotating them to the nearest 45 degrees.
Solid Mode
In this mode, groups of connected shapes will stick together, and repel others as if solid.
Lock Z
This mode can be used with "Solid Mode" to repel shapes only in the horizontal and vertical directions, as if lying on a flat table.
Pick Color
Shows the color picker when enabled, and tapping a shape in this mode will set the color of that shape.
Shows the share menu.
Drops an avalanche of white cubes.
Shows the app settings and subscription screen.
Shows this help screen.

Depth View

Depth view showing distance between shapes.

The left side of the ribbon shows a view looking from the edge of the screen, designed to improve depth perception. This will automatically rotate around to get the clearest view of the closest points on the shape being moved. You can think of it as a rear view camera on a car.

Stage Capacity Gauge

This gauge is to the right of the shelf. It indicates the complexity of the shapes in the stage. When full (red), shapes cannot be added to the stage until some are removed, by placing them in the stack or the shelf.

Changing Colors

You can change the color of a shape by tapping the "pick color" button, choosing a color, and then touching the shape.

Changing the color of a shape.


If you want to share a shape, put it on the stage and then press the "share" button. There are several ways to share your shape:

The scale is the longest dimension for exported meshes. It doesn't affect FCT or image exports.

An active subscription is required to share GLB, USDZ, and STL files.

Sharing a shape.

Thanks! Have Fun!

Please contact for support or to give feedback. Thanks!