Mobile App Testing - Top Bugs that Result in Faulty App Functioning

Mobile App Testing - Top Bugs that Result in Faulty App Functioning

These days people are not using mobile phones only for making or receiving calls and sending text messages. They have become essential multipurpose gadgets. 

Mobile technology is transforming quickly. So mobile app developers need to build the best performing app within a short time frame without compromising the quality.

To validate any app quality the automation team also needs to be on their toes. 

The tester plays a significant role in the quality and delivery of the app. They should know how to test mobile apps with various combinations of platforms, OS, and networks. They should be aware of the reasons for Google or Apple apps' rejection while submitting to the relevant app stores. 

If you are one of the companies, experts, or any business people who are about to begin mobile app development, here we have mentioned some of the common errors and bugs you might come across while performing mobile app testing. 


But before that let's take an overview of mobile app testing. 

What is Mobile Application Testing? 

It is a process through which mobile apps that are in the development phase get tested. The key objective is to test the mobile apps' usability, stability, and performance. 

Mobile app testing is crucial to succeeding in the ever-evolving competition. It helps to assure the best possible app quality for the users. The app is also tested from different other angles including its security and the User Interface. 

Mobile App Testing - Top Bugs that Result in Faulty App Functioning


Category of Bugs 

To assure that your app performs flawlessly, you will have to resolve bugs related to these below-mentioned categories. 

Performance issues 

Perforce issues 

Network related issues 

Compatibility crash bugs 

Slow responses 

Memory leakage 

Permission issues 

Module features 

OS version issues 

General functionality issues 

Top Bugs That You Discover While Testing Mobile App

A bug shows a fault, mistake, or failure in the mobile app being developed. It delivers unexpected negative results. A bug in the app/framework should be taken into consideration and resolved. 

#1. Bugs in Security Testing 

Security testing is a process that discovers threats, risks, and vulnerabilities in a mobile app and safeguards malicious attacks from hackers. 

The key objective of the security testing is to determine all potential gaps and loopholes of the app which might be the reason for data, revenue, and reputation loss. 

Bugs security testing can actually find: 

  • SSL certificate handling issues 
  • Client-side validation 
  • Data leakage 
  • Outdated vulnerable components 
  • Insecure direct object references 

#2. Bugs in UI Testing 

It is a mechanism to test the mobile app aspects with which users will interact. UI testing means testing visual and structural elements of the app to validate they are functioning according to requirements. 

UI testing includes testing visual indicators and graphic-based icons such as toolbars, colours, menus, fonts, radio buttons, text boxes, checkboxes, and much more. 

Bugs UI testing can actually find: 

  • Compatibility issues 
  • Unwanted navigation
  • Inconsistencies in page layout on different devices 
  • Lack of landscape mode 
  • Form validation bugs 
  • Usability bugs 
  • Broken UI elements 

#3. Bugs in Performance Testing 

Performance testing is a non-functional mobile app testing approach that identifies the balance between app stability, scalability, speed, and responsiveness.  

It is an essential step to ensuring a bug-free app. The key objective is to assess the app output, performance speed, velocity of data transfer, use of network bandwidth, command response time, memory utilisation, maximum simultaneous user, and workload efficiency. 

Bugs performance testing can actually find: 

  • Memory relevant concerns 
  • Slow response time
  • Crashes
  • Performance issues
  • Interfacing performance issues 
  • Misconfigured network load 
  • Poorly designed database queries 

#4. Bugs in Unit Testing 

Unit testing is a process in which every unit/component of a mobile app gets tested. It is performed by the developer during the development/coding phase of a mobile app. 

The key objective is to validate whether every unit of the code works as per the expectation or not. Unit tests separate a code section and test its accuracy. A unit could be a specific function, procedure, object, method, or module. 

Bugs unit testing can actually find: 

  • Local data structure
  • Local and global variable 
  • Independent path
  • Global variable naming convention 
  • Incorrect initialization 
  • Boundary conditions 
  • Mapping error 
  • Log and exception handling 
  • Incorrect symbolic indication of an expression 
  • Referred to various data types in the database & code 
  • Wrong arithmetic priority 

#5. Bugs in Integration Testing 

In integration testing, mobile app modules are integrated logically and verified as a group. A typical mobile app includes different modules, coded by different coders. 

The key objective of integration testing is to identify flaws in the interaction between different modules when they get integrated. 

Bugs integration testing can actually find:


  • Database access bugs 
  • Networking bugs
  • Protocol bugs
  • File-format bugs
  • Bugs of interaction with peripheral devices 
  • Web interface-related bugs 
  • Browser incompatibilities 

Summing Up 

Throughout the development and improvement phases of mobile apps, it is quite significant to address all the needs, acknowledge modern technologies, and test the product in and out. 

Being attentive while testing a mobile app helps to discover and fix all faults and common bugs so that end-users will have a superior user experience.

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