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Device Testing in 2025: 7 Types of Devices You Should Always Test Your App On

09/07/2025

Device testing is essential in 2025. Learn the 7 types of devices your mobile app must be tested on—and how Airmobi simplifies real device testing in the cloud.

Introduction: Why Device Testing Still Matters in 2025

In 2025, device testing is no longer a luxury—it’s a critical part of any successful mobile app strategy. With the growing fragmentation in the mobile landscape, users now interact with apps on a wide range of devices—spanning different screen sizes, chipsets, OS versions, and hardware capabilities.

Without proper device testing, even well-coded apps can suffer from unexpected crashes, UI glitches, or performance issues on specific models. That’s why testing across multiple devices has become a non-negotiable step in the mobile development lifecycle.

This article explores 7 types of devices you should always test your app on—and how cloud-based platforms like Airmobi help you scale your device testing efforts without building a costly in-house lab.

Why Device Testing Across Brands, OS, and Screen Sizes is Essential

Here’s the challenge: mobile devices vary drastically in screen resolution, aspect ratio, hardware capabilities, OS version, and manufacturer-specific customizations.

Testing across a wide device set ensures:

✅ UI consistency across screen sizes and resolutions
✅ Smooth performance on both high-end and low-end devices
✅ OS-level compatibility, especially with Android fragmentation
✅ Stable functionality for unique form factors (e.g., foldables, wearables)
✅ Better user experience, which drives retention and reviews

Skipping device diversity in testing may save time initially—but leads to real-world crashes and user churn post-release.

📖 External reference: Why Device Testing is Important

1. Low-End Android Devices

Why they matter: Budget Android smartphones dominate many emerging markets and are often used by first-time mobile users.

  • Run older Android versions (often Android 9 or below)
  • Limited RAM and slower CPUs
  • Smaller screen sizes and lower resolutions
  • Prone to performance bottlenecks and memory-related crashes

Test to ensure: UI renders properly, animations don’t lag, app doesn’t crash under limited resources.

2. Mid-Range Android Devices

Why they matter: This is the largest device segment globally, representing everyday users in most regions.

  • Widely used brands include Xiaomi, Samsung (A series), Realme, Oppo
  • Vary in screen sizes, camera APIs, and sensors
  • Often run Android 10–12, with custom skins (MIUI, One UI, ColorOS)

Test to ensure: Core features work as expected, APIs behave consistently, and navigation is fluid.

3. iPhone SE (or Older iPhones)

Why they matter: Many users hold onto older iPhones longer due to Apple’s long OS support.

  • Smaller screens (4.7”)
  • Less RAM and lower processing power
  • iOS updates available even on older models

Test to ensure: App remains usable on compact displays, touch targets aren’t too small, and animations are optimized.

4. iPhone Pro Max Models

Why they matter: High-end Apple devices showcase the latest iOS capabilities and performance.

  • Large screens with high pixel density
  • Face ID, advanced camera APIs, LiDAR, haptic feedback
  • iOS 17+ and edge-case scenarios (e.g., dynamic island UI)

Test to ensure: Rich UI components render correctly, device-exclusive features (like haptics or Face ID) behave as intended.

5. Tablets (Android + iPad)

Why they matter: Many educational, gaming, and productivity apps rely on tablet experiences.

  • Drastically different screen ratios and resolutions
  • Split-screen or multi-window support
  • Different keyboard/input behaviors

Test to ensure: Responsive layouts, adaptive UI scaling, and no crash on device rotation or keyboard use.

6. Foldable Devices

Why they matter: Foldables are gaining market share, especially in premium Android segments.

  • Dual-display and flexible screen states
  • Complex event handling (e.g., app resume during fold/unfold)
  • Samsung Z Fold, Z Flip series as leading models

Test to ensure: Seamless transitions between screen states, responsive layout behavior during fold/unfold events.

Bonus: Cloud-Based Device Testing with Airmobi

Building a device lab with 7 types of hardware is time-consuming and expensive. That’s where Airmobi comes in.

Airmobi is a cloud-based mobile app testing platform offering access to 800+ Android and iOS devices—including:

  • Low-end to flagship Android phones
  • iPhones from SE to Pro Max
  • iPads and Android tablets
  • Samsung foldables
  • Devices with Android versions from 4.x to 14
  • Vietnamese market-specific models (e.g., Vsmart, older OPPO)

Why choose Airmobi?

  • No need to buy physical devices
  • Swap devices anytime with free or paid plans
  • Manual testing on all major models
  • Upgrade to automation with Appium & CI/CD support (in paid tiers)
  • Record sessions, capture screenshots, and log bugs with ease
  • Share devices with teammates for collaborative QA

Start with the Flat1 free plan and scale up as your testing needs grow:
 👉 Explore devices and pricing
 👉 Try Airmobi for free

Conclusion: Prioritize Device Testing for Better Apps in 2025

In today’s fragmented mobile ecosystem, successful app development doesn’t stop at writing clean code—it depends on how well your app performs across real-world devices. Device testing ensures that your product is functional, responsive, and consistent no matter what device your users hold in their hands.

By prioritizing device testing across diverse hardware types—from low-end Android phones to high-end iPhones, tablets, and wearables—development teams can reduce post-launch risks, deliver better user experiences, and accelerate release cycles.

With tools like Airmobi, you can scale your device testing strategy efficiently—leveraging real devices in the cloud without investing in physical labs. Whether you’re preparing for launch or optimizing an existing app, putting device testing at the heart of your QA workflow is a decision that pays off in reliability and user satisfaction.

📖 External resource: Best Practices for Mobile App QA – Google Developers

→ Start testing smarter today with Airmobi.