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Performance And Load Testing for Mobile Apps

Performance And Load Testing for Mobile Applications

September 13, 2021
Sharon ChuSharon Chu
Sharon Chu

In today’s crowded and competitive mobile landscape, quality performance is crucial. High mobile retention and engagement rates are no easy feat, as mobile users have higher expectations for mobile applications or accessing a website from a mobile browser.

In the software development cycle, performance and load testing are crucial steps before selling any software product. It ensures customer satisfaction and avoids delay and cost overrun. 

This article will discuss performance and load testing, other related problems, and how to use them.

What is Performance Testing?

Performance Testing, also known as ‘Perf Testing’, is the process of estimating the overall system’s performance under workload in terms of metrics such as availability, response time, and reliability. 

Performance testing identifies and eliminates performance bottlenecks and is a critical element in the mobile app testing pipeline.

Why Load Testing is Important for Mobile Apps

Load testing is a non-functional type of testing that tests whether the application can handle the expected load. Hence, whenever we test an application for performance, we will test it on Load, Volume, Capacity, Stress, and many other factors.

Also check: A Complete Guide to Functional Testing

Load testing is critically important in the mobile development lifecycle because it helps build robust and reliable systems by analyzing various test runs’ visual records, charts, and video recordings. We can identify the mobile application's capacity well before the application goes live with load testing.

Process of Mobile App Performance Testing

Performance test approaches change from one application to the other. A project manager needs to develop a testing plan to carry out performance testing successfully. For any mobile application, you have to measure performance testing by the following three categories:

1. Device Performance

It may happen that the application is running smoothly on Android devices but not so much on iOS devices. In such situations, it is essential to monitor applications on different operating systems.

Read: The Increasing Need for Performance Testing in Web Applications

For device performance, the testing is done on:

  • Hardware and software modification
  • An application running in the background
  • Application startup time
  • Memory consumption
  • Battery Consumption while using the application

2. Server/API Performance

The application should control the data productively sent from the server and have the ability to perceive the browser/device interaction to render data accurately. 

For server/API performance, the testing is done on:

  • Server downtime
  • API Performance
  • API calls generated
  • Data sent to and from the server
Don’t Rely on iOS Emulators & Android Simulators. Test on Real Devices.

3. Network Performance

The mobile application must be tested on different networks as the app may function diversely on various interfaces as network protocols affect delays and throughput time. 

For network performance, the testing is done on:

  • Network Speed
  • Packet Loss
  • Network Connectivity

Limitations of Mobile App Performance Testing

In today’s age, we have mobile applications for almost anything. From games to music and dating to shopping, mobile users are highly dependent on their mobile devices. 

Mobile app testing is considered more challenging and tiresome than PC software testing because of the following factors:

  • number and variety of devices available 
  • increased mobility of users 
  • device-specific features

These aspects make the entire testing process even more complicated and troublesome. Hence, there are many hurdles a tester has to handle while performing mobile applications testing. 

Here are the most common limitations:

1.Touch screens

Touch screens are a major source of user interaction, and it is not easy to interpret the entire range of actions a touchscreen provides on a PC emulator. The signals or signs that indicate the human input process need more accuracy and stability as they are challenging to automate. 

2.Multiple UI variations

Different mobile operating systems like Android or iOS have various user interfaces, page layouts, system fonts, rules, and guidelines. The tester checks the usage and design of elements in the verification process. 

If certain factors do not comply with the rules and guidelines for Google Play Market or Apple App Store, it can delay the publishing process. In some cases, this delay can eventually increase the cost of development and testing.

Read: A Complete Guide to User Interface Testing

3. Limited access to multiple devices

The mobile device market is highly fragmented, and choosing mobile devices with the same resolutions, batteries, and built-in features to test the app on all is practically impossible. It can be time-consuming, so developers need to find as much hardware as possible.

How to Improve the Quality of Mobile Apps

No company can afford to spend months and millions of dollars testing mobile apps before deploying them. In the fast-growing and competitive mobile app market, you need to ensure your mobile app is fast, simple, robust, and easy to follow.

Here are few tips for improving the quality of mobile applications:

  • The increasing size of mobile apps is one of the biggest challenges and downloading large applications can be a nightmare for most app users. The less space your app takes in a user’s phone, the better.
  • Try to load textual data first and other media content as the second preference to optimize networking.
  • Avoid duplicate network requests as it increases system congestion and decreases the performance of the app.
  • Optimize the images in the application by using vector images, image caching, and color filters. 
  • Create apps for small and medium screens by implementing adaptive UI flows. 
  • Optimize your app's memory usage by utilizing memory-efficient code constructs and minimum use of external libraries.
  • Optimize the quality of your application by preserving settings data or any other setting modified by the user.
See: A Comprehensive Guide to Mobile Application Security Testing

Final Thoughts 

The mobile app marketplace is crowded with many competitive offerings. If you want a spot on a user's smartphone, you have to earn it with quality performance. 

In this guide, we discussed performance and load testing for mobile applications and how to go ahead and improve the quality of mobile apps. We also shed some light on the limitations and the process to perform mobile app performance testing. We hope this comprehensive guide was able to help and you can take advantage of it.

We at HeadSpin provide a complete solution for mobile app performance and testing. We allow the change for conventional to power testing throughout the entire development life cycle, and we provide zero-day OS and device support.


Q1. How Does Load Testing Work?

A1. Load testing involves placing a simulated load on your app to ensure stability. It measures the app's capacity through response times. So, if your app has extended response times or is unstable under specific traffic levels, you know your software has reached its peak, and it is crucial to implement a solution.

Q2. With load testing, what can development teams analyze and measure?


  • Concurrency issues.
  • Load balance performance.
  • Resource utilization levels.
  • Software functionality errors.
  • The number of users your app can manage before crashing.
  • Software design flaws.

Q3. What is a load test in performance testing?

A3. Load testing helps determine the behavior of a system when multiple users access it simultaneously. In performance tests, the load tested on the system is standard. Load testing increases this to test performance stability.

Q4. What is the difference between load and volume testing?

A4. Developers run load tests to validate the system's performance under heavy loads. Volume testing involves assessing how software behaves under large volumes of data.

Performance And Load Testing for Mobile Applications

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