Learn Best Mobile Usability Practice and Top 5 Mobile Performance Testing Tools in 2024

Understanding a website or app is not enough to be considered mobile usability, one needs to understand how people use mobile devices and that each user’s mobile experience is unique.

Navigating through an app is like finding your way through a city, it should be smooth and straightforward. But how do we ensure that users can easily find what they’re looking for? Let’s explore some popular navigation patterns to make it happen!

Mobile app navigation is about guiding users to their destination with minimal hassle. Designers have a variety of tools at their disposal for creating seamless navigation systems, but one standout option is using an app prototyping tool.

We’ve compiled a list of common UI components and patterns that designers worldwide rely on when crafting navigation. Keep reading to discover why these patterns are effective and what each excels at! As a bonus, we’ve also included the top 3 Mobile Performance Testing Tools, so you can test your mobile website or app right away.

Let’s dive in!

What is Mobile Usability?

Professionals describe usability as how easy it is to use a system interface. It affects how well users can achieve their goals, how quickly they can do so, and how satisfied they are with the experience.

Usability often gets mixed up with UX design. However, mobile app usability is just one part of the broader user experience. UX encompasses everything a user thinks and feels about using a mobile app, including its usability.

Good mobile app usability helps users learn how to use the app quickly. A successful app should feel natural to use, and users should be able to find solutions to any problems easily. Onboarding processes in mobile apps are helpful for guiding users through the app, improving usability, and resolving errors.

Best Practices for Improved Usability of Mobile Apps

For years, Google has been leading the charge in mobile app design, consistently pushing boundaries and setting new standards. To aid designers in crafting superior apps, Google has introduced a comprehensive set of Mobile App UX Principles. 

Let’s delve into these principles and see how they can be applied to your own app design process:

Text and Content

• Ensure readability and user experience by utilizing font sizes above 11 points, maintaining font consistency, and ensuring adequate contrast between elements.
• Make critical content accessible offline, such as account details and payment history, ensuring users can access vital features at all times.
• Opt for tap targets of sufficient size; on Android, aim for 48dp (about 9mm wide), while iOS recommends at least 44 points.
• Place interactive elements intuitively with ample spacing to prevent accidental taps.
• Prioritize swift delivery of on-screen content and transitions to prevent user impatience with loading times.
• Implement models for streamlined multi-step processes, such as confirming details during checkout, to keep users focused without disrupting the main interface.

To further enhance usability

Place call-to-action buttons prominently whenever possible, considering sticky buttons for content-rich pages.

Also read: 8 Common Usability Problems in Web Design and How to Fix Them

Forms

• Incorporate extra security measures for forms requiring sensitive data, utilizing encryption, secure storage, and two-factor authentication.
• Provide clear labels, instructions, and real-time error messages to guide users through form completion.
• Group related fields logically, using visual cues for differentiation and ensuring key elements like CTAs remain visible.
• Using animations or micro-interactions to engage users and provide feedback during form interactions, fostering a sense of progress.

Four Key Pitfalls to Avoid:

• Avoid copying UI elements between platforms to maintain consistency with each platform’s unique user expectations.
• Refrain from using underlined URL links, opting instead for buttons or visual cues to signify screen changes.
• Minimize disruptions by using in-app browsers instead of redirecting users elsewhere for online content.
• Avoid immediate rating requests upon download; allow users time to engage with the app before soliciting feedback, as regular users are more likely to provide meaningful reviews.

Nielsen’s Heuristic Principles For Best Mobile Usability Practice 

1. Compatibility Across Platforms

Mobile users often encounter frustration when apps aren’t compatible with their specific smartphone models, especially on diverse platforms like Android and iOS. Simply cloning an iOS app for Android or vice versa isn’t feasible due to significant differences in programming, design, and interface requirements. 

Each platform demands a native feel to ensure intuitive user interaction. Allocating resources to optimize your app for the most prevalent Android and iOS smartphones is advisable to enhance user experience.

2. Immediate Value Proposition

To retain new users, it’s vital to demonstrate the value of your app early on, ideally during the onboarding process. 

Failure to engage users within the first week often leads to permanent disengagement, considering the saturation of millions of competing apps vying for user attention. Effective user onboarding not only decreases abandonment rates but also contributes to long-term success metrics like user retention and lifetime value.

3. Streamlined Navigation

Poor navigation remains a significant issue for mobile app users. Upon downloading your app, users should easily comprehend how to navigate to accomplish their objectives, whether it’s scheduling an appointment, making a purchase, or accessing information. Minimize navigation barriers and ensure coherence in incorporating unique features to prevent user confusion and disorientation. Usability hinges on the accessibility and simplicity of your app’s products or services, as complex navigation often leads to higher user abandonment rates.

4. Clarity and Brevity in Content

Simplifying content is a well-known principle in mobile design, but it’s crucial to strike a balance by providing essential information necessary for users to achieve their goals, particularly in purchasing processes. Tailoring content for mobile usage instead of directly copying from web sources is essential to prevent overwhelming users with excessive information, leading to a poor user experience. Present information clearly and concisely to facilitate easy consumption and minimize the need for manual zooming or searching.

5. Streamlining User Actions

Reducing the number of steps required for user actions enhances the overall user experience by eliminating unnecessary barriers. Simplify user interactions to make the experience more natural and intuitive, minimizing clutter in the interface to reduce cognitive load. For e-commerce apps, streamline the checkout process by offering convenient options such as Facebook login or guest checkout, along with features like autofill and prominent checkout buttons to expedite purchases and improve overall satisfaction.

6. Minimizing Scrolling

Effective content prioritization ensures that users obtain most, if not all, necessary information within their screen limits, reducing the need for excessive scrolling. While some scrolling may be unavoidable, efforts should be made to avoid side-scrolling, which often hides valuable content and detracts from the user experience.

7. Landscape Orientation Consideration

In mobile app development, overlooking landscape orientation can hinder usability, especially for apps featuring video content. Designing apps to support both portrait and landscape orientations enhances usability and user experience, catering to diverse user preferences and ensuring optimal viewing experiences.

What is Performance Testing?

Performance testing is a critical evaluation process that examines the efficiency and effectiveness of a system, software application, or website. Its main aim is to uncover any performance-related issues or bottlenecks and understand how the system behaves under various conditions.

During performance testing, a range of performance metrics like response time, throughput, resource usage, and scalability are measured and analyzed. This testing involves simulating real-world scenarios to mimic user interactions and system loads accurately. By doing so, organizations can pinpoint performance weaknesses and areas for enhancement.

This testing can occur at different stages of the Software Development Life Cycle (SDLC), allowing for the early detection and resolution of performance issues. This proactive approach saves time, resources, and costs by addressing potential problems before they escalate. Ultimately, performance testing ensures that systems can meet user demands and deliver optimal performance under different circumstances.

Type of Performance Testing

Performance testing encompasses various types, each targeting different aspects of system performance. These types are often used in combination to comprehensively evaluate system capabilities. Here are the primary forms of performance testing:

1. Load Testing: This type assesses system performance under normal and peak load conditions by simulating realistic user loads. It measures response times, resource utilization, throughput, and overall system behavior.
2. Stress Testing: Stress testing involves pushing the system beyond its limits by subjecting it to extreme workloads. The goal is to identify the breaking point and observe how the system handles failures and recovers from them.
3. Soak Testing: Soak testing entails running the system under a sustained heavy load for an extended period. This test helps uncover performance degradation or issues that may occur over time, such as memory leaks or resource exhaustion.
4. Spike Testing: Spike testing assesses a system’s ability to handle unexpected and substantial increases in workload or user traffic. It evaluates how effectively the system scales up to meet demand during peak periods.
5. Scalability Testing: Scalability testing evaluates how effectively the system can scale up or down to accommodate varying workloads or user demands. It contributes to the system’s performance as the load increases or lowers.
6. Volume Testing: Volume testing involves assessing system performance when subjected to large volumes of data. This type of testing helps identify any performance bottlenecks or issues related to data processing and storage.
7. Isolation Testing: Isolation testing focuses on testing individual components or modules of the system in isolation to assess their performance. It helps identify specific performance issues within components before integrating them into the larger system.

Top 3 Mobile Performance Testing Tools

1. Apache JMeter

The Apache Software Foundation developed Apache JMeter, a powerful open-source tool. It’s designed for conducting load and performance testing across various server-based systems including web applications, APIs, and databases. JMeter facilitates the simulation of different scenarios and generates loads to assess system performance under diverse conditions.

Key Objectives

• Evaluate the system’s capacity to handle specific workloads.
• Measure response times and throughput.
• Identify performance bottlenecks.

Key Features and Capabilities:

• Distributed testing capability for realistic load generation across multiple machines.
• Support for a wide range of protocols including HTTP, HTTPS, SOAP, JDBC, and FTP, ensuring comprehensive performance testing for various applications and APIs.
• Robust reporting and analysis tools with graphical representations to pinpoint performance bottlenecks.
• User-friendly interface allowing easy script creation and customization via GUI or Groovy scripting.
• Extensible plugin ecosystem enhancing functionality with advanced features.

Compatibility:

• It works with Windows, macOS, and Linux operating systems.
• Tests common web servers including Apache, Nginx, and IIS, as well as databases like MySQL, Oracle, and PostgreSQL.

Integration:

• Seamless CI/CD integration facilitates performance testing within automated build and deployment pipelines.
• Integration with Selenium offers complete testing of web applications by combining functional and performance evaluations.
• Compatibility with Application Performance Monitoring (APM) tools enables monitoring and analyzing the entire application stack, providing a holistic performance view.

2. Gatling

Gatling stands out as an open-source load-testing tool tailored for assessing the performance and scalability of web applications. Renowned for its efficiency, high performance, and ability to manage large concurrent user loads, Gatling operates on principles of asynchronous and non-blocking I/O, ensuring optimal resource utilization even under heavy loads.

Key Features and Capabilities:

• DSL (Domain-Specific Language) simplifies test script creation, enhancing readability and maintainability of scenarios.
• Real-time monitoring and reporting of critical performance metrics such as response times and error rates facilitate quick bottleneck identification.
• Efficiently handles thousands of concurrent users, enabling precise performance evaluation under significant loads.
• Advanced simulation features like custom behaviors and pacing enable the creation of complex and realistic load scenarios.
• Seamless integration with popular IDEs streamlines test script development, boosting tester productivity.

Compatibility:

• Optimized for load testing web applications, supporting HTTP, HTTPS, and WebSocket protocols for comprehensive testing of diverse web-based systems.
• Compatible with various web browsers and operating systems, allowing testers to evaluate application performance across different environments.

Integration:

• Integration with popular build tools like Maven and Gradle simplifies test execution and incorporation into workflows.
• Seamless integration with CI/CD tools such as Jenkins and Bamboo enables automated performance testing within continuous integration and delivery pipelines.
• Gatling supports integration with APM tools, enabling the combination of load testing results with real-time application infrastructure data for comprehensive performance monitoring.

3. BrowserStack

BrowserStack App Performance is a robust performance testing tool tailored specifically for mobile applications. With a focus on assessing responsiveness, speed, and stability across various conditions, it offers a comprehensive suite of features to ensure optimal mobile app performance.

Key Features and Capabilities:

• Access to BrowserStack’s device cloud with over 20,000 real devices or the option to test locally on your own device.
• Real-time tracking of key user metrics including FPS, ANR rate, app and page loading times, and device resource usage for thorough analysis.
• Simulation of network conditions such as 3G, 4G, and Wi-Fi to evaluate app performance under different connectivity scenarios.
• User flow analysis to pinpoint performance issues in specific app interactions, optimizing critical user journeys.
• Performance comparison tools enable analysis of code changes or new features on app performance.

Compatibility:

• Supports iOS and Android mobile apps, accommodating various frameworks and technologies.
• An extensive library of real devices covering multiple operating system versions, including smartphones and tablets, ensures comprehensive testing across diverse configurations.

Integration:

• Seamless integration with Appium and Selenium enables combined performance and functional testing within existing automation workflows.
• Integration with CI/CD tools like Jenkins, Bamboo, and TeamCity facilitates automated performance testing in continuous integration and delivery processes.
• Collaboration features including result sharing with stakeholders and integration with communication tools like Slack and issue-tracking tools like JIRA enhance team communication and coordination.
• Provides API for custom integration with third-party tools, enhancing testing efficiency and flexibility.

Wrapping up

Ensuring optimal mobile usability and performance is crucial for delivering exceptional user experiences. By adhering to best practices in mobile usability and leveraging top-tier performance testing tools, developers and testers can create mobile applications that are intuitive, responsive, and stable across various devices and network conditions.

Implementing mobile usability best practices involves designing interfaces that prioritize simplicity, clarity, and ease of navigation. Considering factors such as font size, tap targets, content organization, and form design can significantly enhance user experience and engagement. Furthermore, optimizing mobile performance is essential for minimizing loading times, improving responsiveness, and ensuring seamless functionality under diverse usage scenarios.

To achieve these objectives, leveraging robust performance testing tools is imperative. The top three mobile performance testing tools discussed—Apache JMeter, Gatling, and BrowserStack App Performance—offer a comprehensive suite of features to assess and optimize mobile application performance. These tools enable testers to simulate real-world usage scenarios, monitor key performance metrics, identify bottlenecks, and ensure compatibility across various devices and network conditions.

FAQs on Mobile Usability and Performance Tools

What is responsive design, and what makes it crucial for usability on mobile devices?

A website or app that adapts its appearance and content to accommodate various screen sizes and devices is said to have responsive design. It guarantees that customers can simply browse and engage with the website or app, irrespective of the device they’re using, which makes it essential for mobile usability.

What are some best practices for mobile usability optimization?

You may reduce the amount of typing required, make sure buttons and links are large enough to tap, use clear and simple language, and give priority to features and content that are absolutely necessary to increase mobile usability. Finding out what people think and testing your app or website across a range of devices may also help you find areas that need work.

How can I ensure that the mobile application or website loads quickly?

You may employ browser caching, reduce the usage of big files and superfluous scripts, optimize photos and videos for the web, and think about utilizing a content delivery network (CDN) to provide material more effectively to consumers globally in order to guarantee quick loading times.

Which typical faults in mobile usability should one avoid?

Small text sizes, packing the screen with too much material, depending only on hover interactions (which are ineffective on touch displays), and failing to provide users clear instructions or error messages are common faults in mobile usability.