App icon design: a complete guide
A strong app icon uses a single, simple concept that reflects the app or brand, a bold recognisable shape, a limited colour palette and no small text. It follows iOS and Android requirements, works on light and dark backgrounds and at very small sizes, stands out among competitors and is tested with users and in app store listings.
Why app icons matter
An app icon does a lot of work for its size. It is often the first visual impression in an app store, it influences whether people tap to learn more and, once installed, it sits on a home screen among dozens of other icons competing for attention. A clear, distinctive icon helps people recognise and find the app quickly every day, and it reinforces the brand each time they see it.
Because icons are small and shown in many contexts, they need a different approach from logos or illustrations. Our posts on tech startup logos and UI icon types cover related areas of brand marks and interface icons.
Principles of strong app icons
| Principle | Why it matters |
|---|---|
| One clear concept | Easy to understand and remember |
| Simple, bold shape | Recognisable at small sizes |
| Limited colours | Stands out and stays consistent |
| No small text | Text becomes unreadable on home screens |
| Brand connection | Reinforces recognition across touchpoints |
| Distinctiveness | Helps the icon stand out among competitors |
Finding the concept
Start by deciding what the icon should communicate: the app’s core function, the brand mark or a memorable symbol. Many successful icons use a simplified version of the brand logo or a single object that represents the app’s purpose. Sketch many ideas quickly, then narrow down to concepts that are simple, distinctive and meaningful. Review competitor icons in the same category to avoid blending in.
Shape, grid and detail
Icons are displayed inside platform masks, rounded squares on iOS and adaptive shapes on Android. Design on a consistent grid with enough padding so the main shape is not cropped. Use bold forms and avoid thin lines, small details and complex illustrations, which disappear at small sizes. A strong silhouette makes the icon recognisable even when blurred or seen out of the corner of the eye.
- Design on the platform grid with safe margins
- Use bold shapes and strong silhouettes
- Avoid thin strokes and fine details
- Do not include words or small text
- Check that the icon works in a single colour
Colour and contrast
Colour is one of the fastest ways people recognise icons. Choose a palette that reflects the brand and stands out from common colours in your app category. Use strong contrast between the symbol and background, and check how the icon looks on both light and dark wallpapers and in dark mode. Our guide to choosing UI colours covers colour roles and contrast.
Icons across a product family
Companies with several apps often design their icons as a family, sharing a shape language, colour system or grid so they are recognisable as related while still distinct. This helps users find all of a brand’s apps and reinforces the master brand. Each icon still needs its own clear symbol or colour so people do not confuse one app with another on the home screen.
Platform requirements
- iOS: Square artwork that the system masks into a rounded shape; no transparency; multiple sizes for devices and the App Store.
- Android: Adaptive icons with separate foreground and background layers that can be masked into different shapes.
- Dark and tinted modes: Newer platform versions may display icons in dark or tinted styles; provide variants where supported.
- Store listings: Large versions for store pages that must stay sharp and consistent.
Platform guidelines change over time, so always check the current Apple Human Interface Guidelines and Android documentation for exact sizes, file formats and requirements before exporting.
Testing your icon
- Test at real sizes: View the icon at small sizes on real devices.
- Place it on a home screen: Compare it with other popular apps.
- Check light and dark modes: Ensure it stands out on different backgrounds.
- Show it to users: Ask what it suggests and whether it is memorable.
- Test in the store: Compare variations in store listing experiments where available.
Icons for regional audiences
For apps serving the UAE and Saudi Arabia, consider how symbols and colours are perceived locally, and avoid using Latin letters as the main element if many users will see the app in Arabic. A simple symbol or abstract mark often works better across languages than a letter-based icon. Test with users from your main audiences to check that the icon feels appropriate and recognisable.
Icons and app store optimisation
Icons influence how many people tap on an app in search results and browse lists. Some app stores offer tools to test different store listing assets with real traffic. Small changes to colour or symbol can affect conversion, so testing can be worthwhile for apps with significant traffic. Our guide to the mobile app design process covers preparing store assets at launch.
Common mistakes
- Shrinking a detailed logo without simplifying it
- Using text or taglines in the icon
- Choosing colours identical to competitors
- Ignoring dark mode and different wallpapers
- Changing the icon too often, confusing existing users
Frequently asked questions
Should an app icon include the company name?
Usually not. Text becomes unreadable at small sizes; the app name is shown below the icon anyway.
Can we use our logo as the app icon?
Often yes, but simplify it so it remains clear and bold at small sizes.
How often should we change our app icon?
Rarely. Small refinements are fine, but frequent changes make the app harder to find for existing users.
Do iOS and Android need different icons?
They need different formats and sizes, and Android uses adaptive layers, but the design should feel consistent across both.
What size should an app icon be designed at?
Design at a large master size and export all sizes required by current Apple and Android guidelines, checking each at real display sizes.