Question 1

What is the standard icon size for iOS apps?

Accepted Answer

iOS requires multiple icon sizes. The main app icon is 60×60pt (120×120px @2x, 180×180px @3x). The App Store requires 1024×1024px. Settings icons use 29×29pt.

Question 2

What icon sizes does Android require?

Accepted Answer

Android requires launcher icons in: 36×36 (ldpi), 48×48 (mdpi), 72×72 (hdpi), 96×96 (xhdpi), 144×144 (xxhdpi), 192×192 (xxxhdpi), and 512×512 for Google Play.

Question 3

What is the difference between pt and px for icons?

Accepted Answer

Points (pt) are resolution-independent units, while pixels (px) are device-dependent. For example, 60pt at @2x display equals 120px. Always design icons at the highest resolution needed.

Question 4

What format should icons be in?

Accepted Answer

iOS uses PNG or PDF (vector). Android uses PNG or SVG. macOS uses ICNS files containing multiple PNG sizes. Web favicons use ICO or PNG. SVG is ideal for web as it scales perfectly.

Question 5

What is an Apple Touch Icon?

Accepted Answer

An Apple Touch Icon is a 180×180px PNG used when a user adds your website to their iOS home screen. Add it with <link rel="apple-touch-icon" href="/apple-touch-icon.png"> in your HTML head.

Platform	Size	Usage	Format
iOS	20×20	Notification	PNG
iOS	29×29	Settings	PNG
iOS	40×40	Spotlight	PNG
iOS	60×60	App Icon (iPhone)	PNG
iOS	76×76	App Icon (iPad)	PNG
iOS	83.5×83.5	App Icon (iPad Pro)	PNG
iOS	1024×1024	App Store	PNG
Android	36×36	LDPI launcher	PNG/SVG
Android	48×48	MDPI launcher	PNG/SVG
Android	72×72	HDPI launcher	PNG/SVG
Android	96×96	XHDPI launcher	PNG/SVG
Android	144×144	XXHDPI launcher	PNG/SVG
Android	192×192	XXXHDPI launcher	PNG/SVG
Android	512×512	Google Play Store	PNG
macOS	16×16	Menu bar / Finder	PNG/ICNS
macOS	32×32	Finder (Retina)	PNG/ICNS
macOS	64×64	Spotlight	PNG/ICNS
macOS	128×128	App Icon	PNG/ICNS
macOS	256×256	App Icon (Retina)	PNG/ICNS
macOS	512×512	App Store	PNG/ICNS
macOS	1024×1024	App Store (Retina)	PNG/ICNS
Windows	16×16	Taskbar / System tray	ICO/PNG
Windows	24×24	Taskbar	ICO/PNG
Windows	32×32	Taskbar (high DPI)	ICO/PNG
Windows	48×48	Explorer / Desktop	ICO/PNG
Windows	256×256	Explorer (large)	ICO/PNG
Web	16×16	Favicon	ICO/PNG
Web	32×32	Favicon (Retina)	ICO/PNG
Web	48×48	Favicon (high DPI)	ICO/PNG
Web	180×180	Apple Touch Icon	PNG
Web	192×192	PWA / Android Chrome	PNG
Web	512×512	PWA splash screen	PNG
Favicon	16×16	Browser tab	ICO
Favicon	32×32	Browser tab (Retina)	ICO/PNG
Favicon	48×48	Windows site shortcut	ICO
Favicon	64×64	Windows taskbar shortcut	ICO
Favicon	180×180	iOS home screen	PNG

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