Poriangle vs Fineline Studios

There's a technique called Delaunay triangulation used in computational geometry. While it has plenty of practical applications, let's skip the technical stuff—filling shapes with triangles just looks cool. Poriangle is a shape editor that lets you draw any shape and fill it with Delaunay-style triangles. Draw, experiment, and have fun creating your own designs.

Fineline is an app for making seamless geometric patterns with your fingertips — material you can print for fabric, wrapping paper, or wallpaper. ■ Studio Change motif, symmetry, colour, or scale and the preview keeps up. ■ Draw Draw in one cell and the chosen symmetry repeats it across the plane. ■ Shuffle Tap for a new pattern. Save the ones you like. ■ Seamless repeats Patterns are built as a minimal tile, so lines never break when they repeat. All 17 symmetries are available. ■ Export at real size Set size in centimetres and resolution in dpi. Free PNG/JPEG export includes screen images up to 1080 pixels wide and print images up to 150 dpi and 10 cm; Pro adds vector formats (SVG and PDF), resolutions up to 600 dpi, and larger sizes. ■ Colour Curated palettes, including traditional Japanese colours, plus automatic colourway variations. Pro opens the full palette library and every colourway. ■ Library Keep the patterns you like — five in the free tier, unlimited with Pro. ■ Fineline Pro (one-time purchase) Unlocks vector export, high resolutions and large sizes, the full palette library and every colourway, and unlimited saves. One payment, no subscription. All 17 symmetries, every motif, hand drawing, Shuffle and editing are free and unlimited. No watermark, no ads.