Lucitwin is a drawing aid inspired by the traditional camera lucida. Mount your phone or tablet above the paper, choose a reference image and see it overlaid on the live camera view. Use the image on screen as a guide while you draw on real paper.

HOW IT WORKS

1. Mount your device above the paper, with the camera facing down.
2. Choose an included sample image, or unlock images from your device.
3. Switch to alignment mode to move, resize and rotate the image into position.
4. Leave alignment mode and start drawing.

ALIGNING AND DRAWING

In alignment mode, gestures adjust only the image. In drawing mode, they move and zoom the image and camera view together. The app always shows which mode you are in. Fine controls allow precise positioning, rotation, scaling and flipping.

SEE WHAT YOU'VE DRAWN

Lucitwin can detect pencil strokes on your paper and highlight them over the image in a color you choose. New strokes appear as you draw, and with good lighting, you can also see the outlines of your hand and pencil as they move. Follow your progress without hiding the image, and use the detected strokes to realign it when you return to your drawing. One control adjusts detection for your lighting.

SIMPLIFY YOUR IMAGE

Choose from a variety of image presets, including grayscale, outlines, stencils, high-contrast black and white, flat colors and posterized effects. Many presets have adjustable settings.

GRID AND GUIDES

Add a customizable grid over your image, or use corner guides to help position your drawing.

CAMERA CONTROLS

Switch between available device cameras, correct perspective when the device is tilted, and use the torch in low light where available.

CONTINUE LATER

Lucitwin remembers each image's alignment, preset, stroke settings, grid, opacity and camera settings, so you can continue your drawing later. Reset an image when you want a fresh start.

SAMPLES INCLUDED

Start with a selection of free sample images. A single optional purchase unlocks your own photos and other images from your device. No subscription.

WHAT YOU NEED

A stable stand, arm or mount to hold the device above the paper, with additional lighting if needed. Lucitwin is not designed for handheld use: moving the device changes the alignment.

PRIVATE BY DESIGN

No account, ads, analytics or tracking. Your images and camera view are processed on your device. Lucitwin never uploads your images or camera frames.