ARuler Pro 2026 vs Charcoal Studio

ARuler Pro is a field-grade AR measurement tool built on AR technology, designed for designers, contractors, on-site surveyors and anyone who needs precise everyday measurements. Technical Specs • Engine: AR rendering + 3D visualization + simd vector math • LiDAR devices (iPhone 12 Pro / 13 Pro / 14 Pro / 15 Pro / 16 Pro and Pro Max): sub-centimeter depth sampling • Non-LiDAR devices: AR plane detection and feature-point solving • Units: m / cm / mm / inch / ft, bidirectional metric/imperial conversion • Local storage via SwiftData, fully offline, no account required Measurement Capabilities • Single-segment distance: straight-line length between two points • Multi-segment paths: continuous multi-point measurement with cumulative length • Height measurement: vertical distance from ground to selected point • Area estimation: closed polygon vertex paths auto-computed • Level calibration: gyroscope-assisted reference plane locking • Haptic feedback: confirms endpoint placement Who It's For • Interior design and renovation contractors • Real-estate field surveying • Logistics package dimensioning • Geometry teaching and STEM learning • Outdoor distance and object-height estimation Privacy & Compliance • Zero user data collection • No network access requested • Camera permission used only for AR rendering • ITSAppUsesNonExemptEncryption = false Requirements • iOS 17.0 or later, iPhone only • AR-capable device required • LiDAR recommended for best precision

Charcoal Studio brings the feel of a real charcoal sketchbook to iPhone and iPad. Pick up a stick, lay down rich, grainy tone, then blend it into smooth gradients or lift it back out, the way you would on paper. A FULL CHARCOAL KIT
 • Charcoal Pencil: fine lines and crisp detail
 • Vine Charcoal: soft, light marks for loose sketching
 • Compressed Charcoal: dense, velvety blacks
 • Charcoal Block: broad strokes for shading large areas
 • White Charcoal: highlights on toned and dark paper
 • Charcoal Powder: soft washes of tone
 • Lasso: select, move and resize your strokes BLEND AND LIFT LIKE THE REAL THING
 • Blending Stump: push charcoal into the paper’s grain, soften hard edges and build smooth tonal transitions. It moves only charcoal, never the paper, so your darks stay rich.
 • Kneaded Eraser: dab or drag to lift charcoal gently and add highlights. It follows the tooth of the paper, so lightened areas keep their natural texture.
 • Eraser: clean removal whenever you need it. MADE FOR APPLE PENCIL
 • Pressure and tilt shape every mark
 • Strokes are smoothed so blending and erasing follow your hand without jagged corners
 • Double-tap or squeeze Apple Pencil to switch tools or show tool settings
 • Draw with your finger too, or turn finger drawing off for Pencil-only work PAPER WITH TOOTH
 • Five papers: white, cream, toned gray, slate and black
 • A real paper grain shows through every stroke
 • Choose your canvas: portrait, landscape, square, or any custom size from 256 to 4096 pixels AN EXPERIENCE THAT FEELS ANALOG
 • Hear the scratch of charcoal when you hatch, while ordinary lines stay quiet
 • Pinch to zoom and pan around your page
 • Ruler for straight edges
 • Charcoal-tone palette, plus your own saved colours
 • Size, opacity and strength controls for every tool YOUR SKETCHBOOK
 • Every sketch saves automatically
• Unlimited sketches in your gallery
 • Undo and redo as many steps as you need
 • Export at full resolution and share anywhere Everything stays on your device: no account and no sign-up. Focus on your drawing. Leave the dust on the paper. Privacy policy: https://digitalhole.github.io/LilArtist.html Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/