penloft.

Your pen.
Your space.

3D modeling for
Android tablets.

Draw a line. Pull it into a wall. Model with the pen already in your hand.

In development · Android + S Pen

Request early access

For interiors, spaces & objects.
Being built by a solo founder in Istanbul.

penloft / interaction studyLive 3D
ROOM STUDY 01m
3.20 m 0.90 m
01 / 04Draw the footprint

Drag to orbit · scroll to zoom

A working interaction demo, not the released editor. Penloft is in early development.

From the first line to the first walkthrough.Explore the workflow

Think in lines.
Work in volumes.

The familiar draw-and-pull workflow.
Reconsidered for a pen, not a mouse.
The interaction we're building toward.

01

Draw the footprint.

Sketch a closed rectangle on the ground. A simple line is the start of a real space.

A pen drawing a rectangular footprint in perspectiveCLOSED PROFILE
02

Make it exact.

Enter 3.20 m or 3200 mm on the on-screen keypad. Your drawing, at the size you mean.

A 3.20 meter dimension with an on-screen numeric keypad3.20 mLENGTH / m3.207　8　94　5　61　2　3
03

Pull a line into a wall.

Lift the face to give it height. A plan becomes a volume you can turn around and inspect.

A flat profile lifted to become a clay-colored wallPUSH / PULL
04

Give the space an opening.

Cut a doorway through the wall. Orbit the model to see how the room comes together.

A three-dimensional wall with a 90 centimeter doorway cut through it0.90 mSPACE, NOT JUST SURFACES

The pen makes.
The hand moves.

Two kinds of input.
One uninterrupted train of thought.

Tablet input map: pen for geometry, one finger to orbit, two fingers to pan and pinch to zoomPENONE FINGERTWO FINGERS
S Pen
Draw, select, push & pull.Geometry follows the pen.
One finger
Orbit the model.Look around without changing tools.
Two fingers
Pan & pinch to zoom.Find the detail. Keep your place.

The intended editor controls. In the demo above, drag to orbit and pinch or scroll to zoom.

A good pen.
A capable tablet.
Why stop at 2D?

Penloft starts with the Android tablet you already use, and the spaces you want to make.

Pen-first modeling shouldn't
require an iPad.

SketchUp for iPad and Shapr3D show what's possible on a tablet. Their pen-focused tablet experiences don't extend to Android. That's the workflow Penloft is being built for.

SketchUp for iPad iPadOS
Shapr3D No Android support

SketchUp retired its Android Viewer on 29 August 2025. It was a viewer, not a modeling editor. Read the notice.

Other 3D tools exist on Android. Our focus is narrower: a stylus-first, measured push/pull workflow. Platform sources checked 8 October 2026.

New ways to draw.
Open roots.

Penloft is being built on Hew, the open-source, solids-first 3D modeler. We are building a pen-and-touch experience on that foundation, not claiming its geometry work as our own.

Explore Hew on GitHub

Hew: GNU AGPL-3.0-only, with the Hew Plugin API Exception. Penloft's derived core must respect those terms. This page's 3D demo uses Three.js, not the Hew kernel.

What's being built

In development
Android + S Pen, touch navigation, measured push/pull and an installable web app.
Export targets
STL, glTF & 3MF. Planned for the editor, not available in this demo.
Further ahead
Conversational editing with the Claude API.
“Make this wall 3.2 m.
Add a 90 cm door.”
Planned. Not connected or shipping yet.

Bring your next
space to the table.

Work on interiors, rooms or objects with an Android tablet? Help shape what Penloft becomes.

Early development. Open conversation.

Request early access

Opens your email app. No waitlist counter.
No launch date promised.