Graph Paper Pro：精密な幾何学図面と3Dスケッチ

Draw like you’re on real graph paper—only faster. Graph Paper Pro is a focused workspace for building geometric and 3D drawings on graph or dot paper. Place anchored lines that snap with precision, fill closed shapes with solid or gradient color, and finish with clean PNG exports (solid background, grid/dots visible, or full transparent). Why this app • Built for people who love drawing on graph paper—3D doodles, optical illusions, cubes, isometric‑style sketches, clean diagrams. • iPhone, iPad, and Mac support. Apple Pencil works with the included freehand tools. • Offline‑first. No sign‑up, no internet required. Tools that ship • Line, Fill, Eraser, Freehand toolset with a simple top/bottom toolbar. • Snap & precision controls for confident placement. • Fill supports solid and gradient colors (on closed shapes). • “Draw Behind” toggle for the freehand tool to sketch under your shapes. • Unlimited undo/redo. • ~20 sample projects to learn techniques fast. Paper you control (Pro) • Switch between graph or dot paper. • Customize paper color, grid line color/thickness, dot color/size, and line widths. Export • Export on a solid background, with grid/dots showing, or transparent (PNG). • Share straight from the export sheet. Pricing • Free: up to 3 projects, no customization, one export style with watermark. • Lifetime Unlock ($9.99): unlimited projects, all customization, all export options. One‑time purchase, no subscriptions. Feedback & Support: https://forms.gle/YX3prmEVkRtfS16U6 Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/