A small image with a big role
People see and tap app icons many times daily, among dozens of others. Apple (n.d.) advises simple shapes, few colours and no text; Harley (2014) stresses recognisability at small sizes. Fluently processed images feel more beautiful and trustworthy (Reber et al., 2004), and in app stores the icon is the first impression affecting installs.
Platform specs and contrast
Android adaptive icons (Android Developers, n.d.) use separate foreground and background layers masked into circles or squircles, so keep key shapes in the central safe zone. Strong colour contrast and clear visual hierarchy keep icons visible on any wallpaper or dark mode. Following category conventions such as camera or mail aids recognition (Norman, 1999).
Redesigns and badges
As users gain experience they find icons by familiarity more than appearance (Isherwood et al., 2007), so drastic redesigns leave long-time users unable to find the app. Evolve gradually, keeping colour and main shape. Notification badges cover the top right, so keep key shapes elsewhere. Icons that hint at function help newcomers (Gaver, 1991).
FAQ
- Can app icons include text?
- Usually avoid it, as text is illegible at small sizes; the app name appears below the icon.
- Can icons change often?
- Brief seasonal changes are fine, but major redesigns should keep colour and shape continuity.
Sources reviewed: 2026-10-27
References
- Apple. (n.d.). App icons. Human Interface Guidelines. iOS app icon guidance.
- Android Developers. (n.d.). Adaptive icons. Adaptive icon layers.
- Harley, A. (2014, July 27). Icon usability. Nielsen Norman Group. Icon recognisability.
- Isherwood, S. J., McDougall, S. J. P., & Curry, M. B. (2007). Icon identification in context: The changing role of icon characteristics with user experience. Human Factors, 49(3), 465–476. Familiarity outweighs complexity over time.
- Reber, R., Schwarz, N., & Winkielman, P. (2004). Processing fluency and aesthetic pleasure: Is beauty in the perceiver's processing experience? Personality and Social Psychology Review, 8(4), 364–382. Fluency feels beautiful.
- Norman, D. A. (1999). Affordance, conventions, and design. Interactions, 6(3), 38–43. Conventions in design.
- Gaver, W. W. (1991). Technology affordances. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (pp. 79–84). ACM. Perceptible information and action.
