App Icon Sizes

All platforms support PNG. Use PNGs with alpha channels for platforms that need transparent backgrounds (Android, Windows tiles). Note that iOS App Store icons must NOT have transparency.

Always start with the largest size (1024x1024) and scale down. This ensures consistency across all sizes. Use vector tools (Figma, Sketch, Illustrator) for lossless scaling.

At tiny sizes like 16x16 or 29x29, complex details are completely lost. Consider creating simplified versions of your icon for small sizes — keep just the initial letter or core graphic element.

Users may have dark mode or light mode enabled. Ensure your icon is clearly visible and recognizable on both. Avoid using pure white or pure black as the primary icon color.

iOS automatically applies a rounded-corner mask to icons. If you add corners manually, the result will have a double-corner effect or misalignment. Submit square, sharp-cornered icons.

Adaptive icons let different launchers mask icons into various shapes (circle, squircle, etc.). Provide foreground and background layers, and keep critical content within the 72dp safe zone.

The maskable icon safe zone is the center 80%. Add a "purpose": "maskable" icon entry in manifest.json so Android can adapt your icon to various shapes. Preview with maskable.app.

Text is nearly illegible at small icon sizes. Use a graphic symbol instead. If branding requires text, limit it to 1-2 letters maximum.