Design one single mobile app icon for the App Type, using the Icon Concept as its central symbol. Present it as a real App Store or Google Play icon: a rounded-square iOS squircle with smooth corners, centered on a plain very light neutral background, occupying about 70 percent of the square 1:1 canvas. Add a soft, subtle shadow beneath the icon.
Apply the Icon Style with a solid or very subtle two-tone background from the Color Palette. Keep the symbol bold, centered and comfortably padded, with a strong silhouette, crisp edges and smart negative space so it remains instantly readable at small sizes. Make the brush tip and curved stroke feel elegantly composed without becoming a detailed illustration. Use strong contrast, restrained flat shading and a refined top Dribbble or Behance icon-shot finish.
Show no device, hands, mockup, extra objects, multiple icons, variants, text outside the icon, thin hairlines, tiny details, glow, sparkles, lens flares, photographic textures, watermarks or random lettering. Do not copy or resemble an existing app icon, logo or mascot.
Use these details:
App Type: "Calligraphy app"
Icon Concept: "A brush tip leaving one elegant curved stroke"
Icon Style: "Minimal flat icon with crisp geometric shapes"
Color Palette: "Ink black and warm cream"
Using your own logo, product or face? Attach it in the chat and say which of the details it replaces.
Your result will come out close to the example rather than identical to it. Change the details to make it yours.