Open menu with table of contents Know the User - Know the System
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Mobile Application Development 2

Know the User - Know the System

Who are the Users

What do you think? What would be your expectation?

Stuttgart Media University

iPhone (iOS) user in Germany

  • About 4 out of 10 smartphone users in Germany use an iPhone (Sep 2025).
  • You’re more likely to spend on apps (App Store collects more consumer spend). Roughly three times as mutch as an Android user.
  • Very high loyalty: most iPhone owners stick with iPhone when upgrading.
  • App choice: ~1.9M apps available. Guarded by Apple.
  • Fun Fact: If you live in India, you would be very rare. Only 1/2 a person out of 10 would have an iPhone.

— Sources: StatCounter (Germany OS share) · Sci‑Tech Today (platform spend, app counts) · DemandSage (upgrade loyalty) · Backlinko (global share, India context)

Android user in Germany

  • About 6 out of 10 in Germany use Android (Sep 2025).
  • Dominant worldwide: ~7 out of 10 smartphone users use Android.
  • Platform spend is lower than iOS.
  • High retention overall (varies by brand/source).
  • App choice: >3M apps available.

— Sources: StatCounter (Germany OS share) · Backlinko (global share) · Sci‑Tech Today (platform spend, app counts) · Sci‑Tech Today / DemandSage (retention) · DemandSage

Why Platform-Specific UI Matters

1 The Core Question

Should your app look identical on Android and iOS?

The answer: No — and here's why it matters for your users and you.

2 Material 3

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How Many Apps are using Material 3?

3 Liquid Glass

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How many apps are using Liquid Glass?

Key Benefits of Platform-Specific Design

1 1. User Familiarity & Trust

  • Android users expect Material Design patterns
  • iOS users expect Human Interface Guidelines
  • Users rely on muscle memory and learned behaviors
  • Native feel = Professional, trustworthy app

2 2. Leverage Platform Strengths

  • Android: Back button, notification customization, app drawer
  • iOS: Swipe gestures, Face ID, Dynamic Island
  • Each platform has unique features that enhance UX

3 3. Navigation That Makes Sense

  • Android: Side drawers, floating action buttons
  • iOS: Bottom tab bars, modal presentations
  • Wrong patterns = frustrated users

Result: Higher engagement, better ratings, fewer support requests

The Trade-offs: Downsides to Consider

1 Increased Costs

  • 2x design work — separate mockups for each platform
  • 2x development effort — platform-specific implementations
  • 2x maintenance — updates need double the time

2 🔄 Consistency Challenges

  • Brand experience differs across platforms
  • Feature parity delays (one platform ships first)
  • Documentation needs platform-specific versions

3 Testing Complexity

  • Separate test cases for each platform
  • More edge cases and interaction patterns
  • Higher QA resource requirements

Reality Check: Budget 30-50% more time and resources

The Smart Approach: Adaptive Design

1 Find the Balance

1.1 Keep Consistent:

  • Brand identity (colors, typography, logos)
  • Core functionality and features
  • Content and messaging

1.2 Adapt Per Platform:

  • Navigation patterns (tabs vs. drawers)
  • UI components (switches, pickers, alerts)
  • Platform-specific features (Face ID, back button)

2 Examples

  • Airbnb: Similar aesthetic, different navigation
  • Spotify: Consistent brand, platform-appropriate controls
  • Google Apps: Material Design base with iOS adaptations

Best of both worlds: Brand consistency + native experience

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Summary: Making the Right Choice

1 When to Use Platform-Specific UI

  • Consumer apps with broad audiences
  • Complex navigation structures
  • Apps where trust and polish matter
  • Long-term products with ongoing development

2 When Identical UI Might Work

  • Simple utility apps (calculators, converters)
  • Games with custom interfaces
  • MVPs where speed-to-market is critical
  • Internal/enterprise apps with trained users

3 The Bottom Line

Respect platform conventions = Better UX = Business success

The investment in platform-specific design pays dividends in user satisfaction, retention, and competitive advantage.