IOS App Testing for Beginners: A Practical Approach – 2022 [Updated]

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Collection of Basic knowledge for iOS App Testing:

Apple mobile devices, such as the iPhone, the iPod Touch, and the iPad, have always been extremely popular among their users. According to the most recent available data, there are close to one billion Apple devices in use across the world that are powered by iOS.

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IOS App Testing
ios App Testing

Following is Quantity of iPhones shipped as a percentage of all smartphones shipped from the third quarter of 2007 through the second quarter of 2022

iOS App Testing
Source – Market share analysis of iPhones in 2022


Apple’s mobile devices, which are commonly referred to as iDevices, are the only ones that are compatible with the iOS mobile operating system. Since 2007, when the iOS was initially developed just for use on iPhones, the mobile operating system has progressed to include support for Touch devices as well as iPads.

According to the most recent research, iOS is now the mobile operating system that is in second place in terms of popularity. iOS is exclusive to Apple hardware, which is a clear indication of how popular the operating system is, but Android can be installed on devices manufactured by a variety of different companies. The popularity of the operating system can be inferred from this fact.

There have been a total of ten significant versions of iOS during the course of its existence, and each release has included significant feature enhancements.

Rank and Quantity of Shipments of the Top Five Smartphone Manufacturers Worldwide, Second Quarters of 2022 and 2021 (M Units)

source – Worldwide Quarterly Smartphone Top 5 Company Shipments, 2022Q2 and 2021Q2 (M Units)

This iOS operating system is well-known for its friendliness toward users, fluidity in operations, apps that do not crash, and other similar qualities. The Apple iTunes app store for iOS has a staggering number of applications—up to 2.2 million, to be exact—which brings up an interesting point when talking about apps. The total number of app downloads has skyrocketed to an astounding 130 billion in a very short amount of time.

Apple’s iOS is a mobile operating system that does not discriminate based on the user’s location or language preferences. This is one of the primary reasons behind the success of this operating system, which has only been around for ten years since it was initially developed. It is compatible with forty distinct languages.

When compared to Android smartphones, the user interface (UI) of iOS devices is not only more appealing but also more refined, and this is not simply limited to the languages.

latest ios mobile interface
iOS Mobile interface

Here are some Applications statistics:

  • Nearly a thousand new app submissions are made to the Apple iTunes app store every single day.
  • About a third of the apps in the Apple iTunes store are available without cost.
  • On average, the price of a paid iOS app is between $1.10 and $1.30.
  • For iOS, the typical game cost is between $0.55 and $0.65.

Tell me about the number of apps you’ve downloaded and utilised on your iOS device.

Quite a few in total! Right? Beginning with Gmail and moving on to Facebook and continuing on to Clash of Clans and Asphalts. Software testers have a lot of work to do because of the types of applications, the number of users, and the diversity of those users. They do, don’t they??

Because of the differences in size between the iPhone, iPod touch, and iPad, it is necessary for a tester to perform not only functional testing but also comprehensive user interface testing in order to validate an application on all three devices.

iOS App Testing

As was just mentioned, the iOS operating system is only compatible with Apple-made hardware and devices. That comes as a really welcome and welcome relief. On the other hand, there are a large number of Apple devices and versions that are compatible with iOS.

Apple’s operating system is, in a nutshell, closed, in contrast to Google’s Android operating system, which is open. The launches of new operating systems or devices are meticulously planned.

This is an added advantage because:

  • As QA, we need to have a very clear picture of what all devices are currently accessible on the market since the size of the devices that are currently available or that are going to be published is fixed. Additionally, the size of the devices that are going to be released is also fixed. It is made simple for a quality assurance inspector to select the testing platform.
  • Since the operating system is a closed system, we do not need to do an in-depth analysis of it as we do with devices. This makes it easier (both in terms of time and effort) to make a decision regarding the test bed that will be used for testing the operating system.

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  • Although Apple’s own automation tools aren’t the easiest to get the hang of, the company offers a wide selection of them.
  • I remember that in order to test the GPS functionality of Android, I had to spend anywhere from one to three days researching how to write dummy scripts that sent a fake location. On the other hand, doing so with iOS was quite easy and uncomplicated because the operating system comes equipped with the functionality to broadcast bogus GPS coordinates while the user is engaged in activities such as walking, jogging, or cycling.
  • It is not recommended to test the GPS by using a field test for the initial testing; rather, transmitting dummy GPS data is advised because it is more convenient and saves time as well.
  • In contrast to other operating systems, Apple’s application submission process adheres to a number of stringent criteria. Because of this, developers have a better chance of seeing their work implemented, which is a significant advantage over competing operating systems.
  • Because the operation of the device and OS itself is predetermined and easy, there is a decreased risk of losing out on the various ways in which an app can function as a result of this. On iOS, there is no option to forcibly close an application, whereas on Android, we are able to terminate and force close apps. As a result, the level of complexity being tested here has been decreased.

These are some of the benefits that we receive from using Apple products; nevertheless, it is not necessary that all items or apps enjoy the same advantages as Apple products. The iOS operating system is notoriously difficult to work with, especially for cross-platform applications.

The application implementation can be any of the below 3 types:

  1. Web-based Applications: These are the applications that function in a manner that is analogous to that of the built-in iOS apps. These are the typical websites that a person will visit when using the Safari web browser on their iPhone.
  2. Native Application: When using the iOS Software Development Kit (SDK), an application can be created that will run natively on supported iOS devices. Some examples of such applications include VLC, Flipboard, and Uber.
  3. Hybrid Application: This is a combination of the two categories discussed above, sometimes known as a hybrid. This provides access to the content of the website by way of a viewing area for the website’s content, and it also includes some user interface elements for iOS. Examples include Zomato, Twitter, and even Gmail.

Types of iOS App Testing

Below are some examples of the various kinds of testing that may be performed on iOS apps under normal circumstances:

  • Manual Testing – Using Device
    • System Testing
    • UI/UX Testing
    • Security Testing
    • Field Testing
  • Manual Testing – Using Emulator
    • Unit Testing
    • Integration Testing
    • UI testing
  • Automation Testing
    • Regression Testing
    • BVT Testing
    • Compatibility Testing
    • Performance Testing

Manual Testing – Using Device

a) System Testing:

This particular kind of iOS testing is carried out on the system in order to verify that the various parts of the system can communicate with one another.

During this phase of the testing procedure, the iOS application is loaded onto a genuine Apple device. After that, the application is observed as it interacts with the user interface in order to simulate a predetermined series of user actions. A touch operation or a swipe operation on the screen are two examples of typical user actions that can be performed.

The final step involves comparing the actual result to the anticipated one.

For our Example given above, a typical system test can comprise of the following steps:

  • Log in to the iOS sports team and fundraising application using the Facebook account login using open Authentication.
  • Select a pre-defined system amount of $10 from the given options.
  • Proceed to the payment gateway.
  • Select PayTm mobile wallet option for the payment process.

The procedures that most comprehensively cover the various End to End flows within the system are called system tests. Every test has to be run using all of the many settings that are readily available. Additionally, it is contingent on the hardware platform as well as the version of iOS on which the application was loaded.

b) iOS UI Testing

The user interface and experience that iOS devices provide have been critical to the company’s overall success.

  • Inputs: The testing of the functions of the touchscreen, such as long/short touch, 3D touch, and scrolling, button sizes, and positioning of the buttons, as well as the colour of the fonts and the size of the fonts, etc., fall under this area.
  • Hard Keys: Native programmes work faultlessly with the built-in hardware keys or hard keys that are already present on the device, such as the Home key and the sound buttons, amongst other things. The application that is being tested should likewise interact with the hard keys in a manner that is comparable to that described above.
  • Soft Keys/ Soft Keyboard: How frustrating is it that the keyboard does not appear when you are in the message section of your WhatsApp account? The appearance of a keyboard, the ability to hide it when it’s not in use, support for smileys and symbols, and support for all characters and symbols, among other things, are essential features.
  • In the context of our illustration, the keyboard may play a role in a number of different contexts, such as when inputting the individualised amount or when entering credentials or card information into the payment gateway.
  • Screen: If the application is supported on many devices, then the application’s orientation should be validated on each of those devices. The instrument that is used for the testing procedure can result in some variations in the resolution that is measured. In the meantime, testing should also be carried out for the portrait and landscape configurations, in addition to the utilisation of the keyboard in each scenario.

Even if your app is built for many platforms, you should still test it on iOS to make sure it works properly.

  • Lists: In iOS, whenever there is a list that needs to be displayed, it always shows up on a brand new screen. This is in contrast to Android, where the list appears in a pop-up window.
  • Messages: The error message that is displayed on an iOS device when an application has crashed is distinct from the one displayed on an Android device. Also, if you’ve noticed, when you free up memory on an Android phone, small messages flash on the screen, such as “#GB memory freed” and similar things. However, we never see flash messages on iOS devices.
  • Delete Confirmation: If you carefully examine an iOS app, you will notice that the Cancel action is located to the left of the Delete option on a delete confirmation popup. However, this is not the case on Android or other operating systems.

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c) Security Testing:

In this example, we have an application that includes both a payment gateway and a login page, and both of these pages are supported by the integration of social page support.

For instance, let’s say that you have an ICICI app on your phone. If, when you log in, someone else’s account information is displayed rather than your own, or if you perform a money transfer and the app sends the OTP to a different phone number that is not your own, you can probably guess what will happen. Therefore, it is essential to perform security testing.

In order to protect the application from being hacked, the data used for logging in to social media platforms and the payment gateway should be encrypted or otherwise protected.

d) Field Testing:

An app’s behaviour on a mobile device’s data network is put through its paces with the help of a field test.

Typically, this test is carried out once the application has reached a stable stage, meaning that it does not crash when being tested internally and that all functionality issues have been resolved. The primary purpose of this is to test how well the application works while connected to a slow data network.

Manual Testing – Using Emulator

a) Unit Testing:

The majority of the work in this area is performed by the development team or by individual developers. During this testing, a specific module of the source code is examined to determine whether or not it is functioning as anticipated.

Unit test cases are designed by developers for a specific component, also known as an isolated module, on which they are working. Following the successful completion of this test, the individual module is subsequently inserted into the source code in order for it to begin functioning as a component of the integrated architecture. This is primarily a manual test run that is being carried out with the assistance of test emulation, as the header indicates.

b) Integration Testing:

In the steps before this one, we talked more about testing at the unit level. Now that we are confident in the operational capability of the separate units and modules, it is time to move on to testing the integration between them. The purpose of this testing is to determine the problems that are associated with the various integration points.

In the examples that we have provided, the login screen can be considered one module, while the payment gateway can be considered another module.

The testing of both components separately will be included in the unit test. Integration testing, on the other hand, will examine the completeness of both of the modules.

c) UI Testing:

An app absolutely need UX testing in order to be successful, as was just discussed, and UI testing is an essential part of that process.

Because of the high cost involved, purchasing all of the different phone models for testing is almost impossible to do. Consequently, utilising an emulator is the ideal choice because it does not cost anything, and also because evident UI issues are simple to see on emulators.

iOS App Automation

a) Regression Testing:

Because of the dynamic nature of the environment, modifications are continually made in order to either improve the application or address problems that were discovered in an earlier version of the program. During the process of implementing the changes, there is a possibility that the modifications made to the application will result in a change to the functionality that is currently present.

To put it another way, the changes that were made might result in a brand new group of problems with the application.

It is necessary to carry out regression testing in order to determine whether or not the application will continue to function in the same manner even after the modifications have been put into place. In addition, because it is a recurrent task, automation is a useful tool for carrying out this kind of test run.

b) BVT Testing:

It is a good practise to have an automated suite run on the new build that has been issued for testing. This not only saves a lot of time, but it also ensures that any crashes that occur in the fundamental functionalities are detected right away. The results of automated basic verification tests to accept or reject a build can be taken in minutes as opposed to the hours it would take to do the same thing manually.

c) Compatibility Testing:

As was previously mentioned, Apple publishes a wide variety of products under the category of devices. To be more precise, there are currently 15 distinct types of iPhones, 6 different iPod Touch models, 10 different iPad models, and 2 different iPad Pro models available for purchase.

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Now, when an app like ours is developed, [Sports team fundraising application], it should be supported by all of the devices that were mentioned earlier in this paragraph. That suggests one thing, and that is that all of the test cases should be run on each of these different devices.

When the number of devices is as high as this, manual labour is no longer an option. Testing through automation is strongly recommended for compatibility.

d) Performance Testing:

Some of those that are tested in Performance testing are:

  • The behaviour of the application after it has been made operational or after it has been running for a very long time. During the period in which operations are being carried out, the application should be made to communicate, interact, or stay idle.
  • The same operation needs to be carried out on each occasion, but with a different total quantity of loads.
  • How the system operates when a very large amount of data is being transferred.

These cases are repetitive in nature and are mostly done using automation.

iOS App Testing Best Practices

iOS App Testing can be tough, tricky, challenging unless it is done correctly.

It is possible to implement the following best practises in iOS app testing in order to make progress in the right direction:

  1. Forget Emulators: Emulators are used more frequently than real devices these days for a variety of reasons. However, this is hardly the best possible scenario. Emulators are not capable of testing things like user interactions, battery consumption, network availability, performance based on usage, or memory allocation. Therefore, make it a habit to test on actual devices whenever possible.
  2. Automate things rather than doing manually: How quickly are you able to do a certain activity? Everyone in this modern environment is principally concerned about the amount of time spent. Automation not only decreases the amount of time required to complete the task at hand, but it also boosts the software testing process’s efficacy, efficiency, and coverage.
  3. Share the work: Distribute the testing to all of the teams, including the team responsible for the development. We can get assistance from the development team in terms of automating the manual test cases, and we can also get assistance in terms of manually executing the test cases themselves if we need it.
  4. Catch the Crash Logs: Under certain conditions, the application that is designed for iOS might become unresponsive or crash. Crash logs are an extremely important part of the problem-solving process.

Following steps can be performed to capture the crash logs:

  • For MacOS:
    • Sync the iOS device with the computer [Mac].
    • For Mac OS, hold down the Option key to open up the Menu bar.
    • Go to Go Menu and click on Library.
    • Navigate to  ~/Library/Logs/CrashReporter/MobileDevice/<iOS device name>/.
    • The log file’s name should start with the application’s name.
  • For Windows OS:
    • Sync the iOS device with the computer [Windows].
    • Navigate to C:\Users\AppData\Roaming\Applecomputer\Logs\CrashReporter\MobileDevice\<iOS Device name>\
    • The log file’s name should start with the application’s name.
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5. Capturing the Console Logs:

The information pertaining to the applications running on an iOS device can be found in the console logs.

iTools are one of the tools that can be used to accomplish this goal. When the iOS device is connected to the computer on which iTools is running, you can access the “Toolbox” icon within the iTools application by clicking on the icon. When you select “Real-Time log” from the menu, the real-time console log will appear.

6) Capturing Screen:

When the steps are broken down visually, the problem is much simpler to comprehend and, as a result, easier to solve.

If you want the development team to have a better understanding of the problems, it is recommended that you record the screen or take screenshots of them. By simultaneously pressing the Power and Home buttons on your device, you can use the built-in feature to capture a screenshot.

Quick Time Player Recording can be used to record a screen while an iOS device is connected to a Mac via the lightning cable. This connection is necessary for the recording to take place.

iOS App Testing – Automation Frameworks

Some of the most commonly used automation frameworks are listed below:

1) Appium:

Appium automates the iOS App Testing by utilising the Selenium Web driver.

This platform is not affiliated with any other company and can be used on the web as well as on mobile devices (both Android and iOS). Because it is open source, there are no language restrictions attached to it. It is not necessary to make any changes to the application or gain access to the source code in order to automate using Appium.

Appium functions faultlessly regardless of the type of application being used, whether it be Native, Hybrid, or Web.

2) Calabash:

Calabash is an open-source, cross-platform framework that provides support for automation testing on both Android and iOS devices.

The Calabash tests are written in Cucumber, which is straightforward and has characteristics that are analogous to those of a specification. Calabash is a collection of libraries that, when combined, make it possible for users to interact with hybrid as well as native applications. Interactions such as gestures, assertions, screenshots, and so on are all supported by it.

3) Earl Grey:

Earl Grey is Google’s in-house solution for user interface (UI) testing. The likes of YouTube, Google Photos, Google Play Music, and Google Calendar have all been put through their paces with this.

Recently, Earl Grey became available as open source. Earl Grey offers a number of significant benefits, the most important of which are built-in synchronization, visibility checks performed before interactions, and genuine user interaction (including tapping, swiping, and so on). This is extremely similar to Google’s Espresso, which automates the user interface of the Android operating system.

4) UI Automation:

UI Automation is developed by Apple and is very similar to UI Automator to Android. The APIs are defined by Apple and the tests are written in JAVA.

5) KIF:

“Keep it Functional” is what “KIF” stands for. This is a framework that was developed by a third party and is open source.

This is an iOS integration test framework that is utilised for XCTest test targets and has a close relationship with them. Because KIF is simple to configure and integrate with Xcode projects, there is no need for an additional web server or additional software packages. When it comes to iOS versions, KIF supports a wide range of them.

Q. How to beta test an iOS app?

Ans: Install TestFlight on the specific iOS device to be used for testing.
Open the invitation email or tap on the public link on the iOS device.
Tap View in TestFlight or Start Testing; or tap Install or Update for the app to be tested.

Q. How can I test iOS app without iPhone?

Ans: Here are your three best choices.
Xcode 9 Simulator (Mac) It might seem obvious, but the best simulator for iOS devices comes from Apple itself. …
Visual Studio With Xamarin Live (Windows, Mac) [No Longer Available] …
Visual Studio With Xamarin and a Mac (Windows, Mac) … (Browser)

Q. Can I test iOS app without developer account?

Ans: To test iOS App you need only Apple ID without paid Apple Developer Account, but to test IAPs (In-App Purchases) you need to enroll.

Q. Does Apple have a testing program?

Ans: As a member of the Apple Beta Software Program you can take part in shaping Apple software by test-driving pre-release versions and letting us know what you think. Learn more about the next releases.

Q. How do you become an Apple tester?

Ans: Visit the registration page at The program allows you to test updates to Apple’s operating system (iOS) before it is released to the public. This program is open to anyone with an Apple device and ID.


An iOS app testing can be one of the most difficult tasks to complete. Through reading this post, I hope you were able to gain a solid grasp of testing iOS applications.

The selection of the appropriate strategy, the most effective testing process, methodologies, tools, emulators, and devices, among other things, is essential to the achievement of a prosperous outcome in iOS application testing.

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An aspiring Software Tester formed an obsession with Blogging, SEO, DIgital Marketing and helping job seekers to find Jobs in Software Testing Field. Also I'm working as a Full-Time employee in Fintech IT Industry.

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