ios app architecture

Since you have your business idea to be applied and converted to the iOS app. You then start to make the iOS app working with iOS programmers hired regarding the idea that will be implemented in the app for the patrons. It’s at this moment you should think about iOS app architecture. It does matter, importantly, what are the formats and concepts behind the app so that it serves its purposes well enough.

Apps, being an integral part of lifestyles, are fostering competition for entrepreneurs not just to get a remarkable app idea but also it has to be implemented adequately. Moreover, it is inevitable to incorporate the latest tech stack that causes the overall procedure to be smoother for coders executing the business logic adequately.

Amongst all mobile app architectures and techniques, determining the concept and execution of the iOS app is really necessary. It can assist in eliminating unformed codeless and code replicas. It further builds adequate and healthful coding circumstances for the programmers.

What is iOS App Architecture?

iOS app architecture is the layered configurations. iPhone apps do not transmit the underlying hardware straight. It demarcates how all components of the app respond to each other and to the input from the user’s end. There is no communication between numerous layers swiftly. The application layer and hardware layer perform the exchange of data.

There are lower and higher classes in the conventions, which propose on which the solution relies and equips graphics and the user side’s presentation services, respectively. Most of the system interfaces to reach a unique package named a framework. It maintains a dynamic shared library, that is a file linked.

1. Core OS Layer

It is the level called the interface level. It holds 64 bits, making it faster, which streamlines and serves in the Cocoa layer. This layer transmits data that users generate. It is also named asKernel Layer. The level is straight with the file system and preaches the reality of certifications that belong to the solution.

2. Core Services Layer

It begets instantaneous admission to the database in addition to the file authorities. Some significant frameworks are present in this layer, which administers the iOS OS to resolve issues itself and equip satisfactory working. It is the 2nd lowest layer in Architecture, as shown above. Below are a few influential frameworks attending in this layer:

3. Media Layer

This level has all the tools that are connected to process all the media formats like video, graphics, animations, etc. It has frameworks like ULKit Graphic Framework, Core Graphic Framework, Core Animation, etc.

4. Application Layer (Cocoa layer)

The Core OS layer maintains the low-level functions that most other tech stacks are assembled upon. The segments of this layer functioned to assemble a combination of interfaces.

Why Are iOS App Architecture Patterns Noteworthy for Your App?

There are many reasons and significant ones to determine the architecture. The dependency of apps on humans is much. During the day, they spend 4-5 hours on the apps on their smartphones. Here are a few benefits of choosing the best iOS app architecture.

  • Organizes the code modules well for the iOS app
  • The understanding of the code will be defined and compatible
  • The distribution of responsibilities would be defined properly
  • Easy to access
  • Simple to maintain and, therefore, the cost is also low

iOS App Architecture Patterns

Building iOS apps for businesses that do not have defined architecture is like a path without any aim. One can define a business idea without any solid foundation for an app. The same principle follows in employing iOS app architecture conventions as well. In ignorance of these conventions, developers can lead to:

  • Clustered and messy code
  • Unclean modules
  • Unscripted documentation

Let’s define some characteristics of a good iOS modular structure

  • Equal distribution of tasks among all commodities
  • Effortless testability at each phase
  • Low maintenance cost and uncomplicated to operate

The following write-up has noteworthy design patterns.


It stands for Model-View-Controller. It is widely adopted or, we can say, popular architecture, even suggested by Apply itself. iOS, MacOS, and watchOS employ this as a default pattern. Its design patterns isolate the presentation layer from the business logic.

  • The model is the database layer that deals with the data for controlling and keeping.
  • The view determines the presentation of the graphics, tables, charts, structures, etc.
  • The controller is to work as an intermediary between the view and the model.


MVP means Model-View-Presenter. It is majorly for the pursuit of designing creative UIs. It differs from the MVC in the presenter layer, substituting the controller. The P layer eliminates extra assignments for coders in the entire building procedure of iOS apps with other layers. MVP architecture pushes most of the view logic into this layer.

  • The model layer is to hold the data and deploys UI components
  • The view layer represents the graphical exposition of data conducted.
  • The presenter contains all the business logic of the application.


It stands for model-view-viewmodel. It’s the developer’s choice when they separate abundant logic in the view layer and transfer it to the ViewModel. This is preferred mostly for designing the representation screen of the iOS app.

  • The model layer deals with the database.
  • The view layer exhibits the structured data to the patrons via the GUI.
  • In the ViewModel, the data is recovered from the Model and transferred to the View.


It represents the model-view-controller-ViewState of the architecture. This convention is similar to MVC and MVVM types when considering the structure. In terms of techniques, it correlates to MVVM, and with MVC, it inflates. Nevertheless, the view controller still confines the changeovers in the model, which is distinct from the view model in MVVM. To assemble this more efficiently and manageably, it detaches the view state and makes it more painless for programmers.


It stands for View, Interactor, Presenter, Entity, and Routing. This architecture is prevalent for constructing components for purposeful use cases. To begin with, it instructs various elements, which is difficult. It also mandates repetition of the code so code generators could help a bit here.

The ELM Architecture

Or also known as TEA architecture, is a new genre of configurations a lot different from any other way. View and model are independent of each other. The updates in both these layers are endured through the reducer process.

Factors to Pick for the Perfect iOS App Architecture

Although it’s all dependent on the project’s essentials. There are still a few characteristics that should be regarded while making any final decision.

Understand the Problems with Source Code

Pinpoint what’s inaccurate with the code, and founded on which, you can determine one of the architectures for well-oriented application execution.

Prefer the one that improves the code criterion

Pick the structure that corrects the points with the UI resulting in a more interactive and appealing one that serves the pursuits relevantly.

Determine the objective of the design

Pick the app architecture based on which the purpose of the app is served efficiently, determining the configurations and elements.


As you can now understand, all the iOS app architecture listed above focuses more on the design patterns of iOS. The architecture is important to define for giving a path to the app and also makes it easier for iOS apps to build apps. Although each of these patterns has its own pros and cons, choosing the right one is definitive.

If you have any queries about iOS app development services, Elluminati serves various services as they have a dedicated team with enough experience and expertise who can drive you with the best results.