LightPad vs TraceLock

Lay a source sheet and a blank sheet on the display: a bright, evenly lit surface shines through both, and you trace on real paper with confidence. Built for how tracing actually works: LIGHT YOU CAN TUNE - A light surface that never sleeps or dims on its own mid-trace - Color temperature from 2700 K (warm) to 6500 K (daylight), rendered from real black-body values — warm light keeps thin pencil lines readable - Brightness from a soft low glow up to your display’s true peak — on HDR displays the slider goes beyond regular screen white - Dimming happens in the light surface itself, never by pushing the panel low — no added flicker in the dark range TRUE-TO-SIZE GRIDS - Metric 1 cm grid, or imperial 1-inch grid with 1/4-inch subdivisions - Physically accurate on every supported iPhone and iPad — 1 cm on screen is 1 cm on paper - Center crosshair for squaring up your sheets - Pure black lines with adjustable line width, so grids stay visible through paper MADE FOR PAPER ON GLASS - Touch lock: one tap locks the screen so resting palms and paper press nothing; hold to unlock - Controls fade away and return with a tap — while you work, it is all light - Works in any orientation and window size PRIVATE BY DESIGN - No account, no ads, no tracking, no analytics - Requests zero permissions and never connects to the network - Works completely offline For illustrators inking and refining sketches, animators flipping between drawings, calligraphy and lettering practice, embroidery and quilting pattern transfer, and anyone who traces on real paper.

Turn your iPhone or iPad into a professional tracing lightbox. TraceLock is built for beginners, anime sketching, journaling, calligraphy practice and kids' drawing drills — no bulky, expensive light table required. The workflow is simple: import a photo, convert it to clean line art in one tap, adjust the composition, then lock the screen. The display stays awake at full brightness; lay paper on top and trace with a pencil. Core features • Full-screen touch lock: palm and paper contact are intercepted so the image never shifts. Hold for 2 seconds to unlock safely, or press a hardware volume button. • Five smart line-art filters — Sketch, Outline (noise-free DoG edges), Comic, B&W and High Contrast — with a floating slider for real-time line weight and depth, even through thick paper. • Free composition: pinch to zoom, drag, rotate 90°, mirror horizontally. Rule-of-thirds grid, 1cm physical grid and diagonal guides, plus accurate mm/cm rulers along the top and left edges. • Eye-comfort backlight: Cool White, Warm White, High-Contrast Green and Amber Night. • 385 built-in sketch templates across 9 categories: animals, plants, people, vehicles, buildings, food, cartoons and more. • Showcase camera: a semi-transparent overlay aligns your paper drawing with the digital original, then creates a side-by-side progress poster. A4 printable practice sheets — the 1.2.2 focus • Three layouts: 1-Up full page, 2-Up split and 2x2 grid. Line opacity 15% / 35% / 70% / 100% for faint tracing guides that never hide real pencil strokes. • Pinch to zoom and drag images inside the sheet. In multi-up layouts, adjusting one panel updates the others in sync; a zoom indicator and double-tap reset keep it under control. • Landscape and foldable layouts now use a left control sidebar plus a full-height sheet on the right — the paper no longer shrinks to a sliver, and the background fills the screen without black bands. • AirPrint and high-resolution PDF export for home, classroom or craft groups. Privacy All image processing happens on your device. No photo uploads, no tracking, no ads, no account. TraceLock does one job and stays out of your way.