Google's Android and Apple's iOS are two different types of operating systems utilized principally in mobile technology, such as smartphones and tablets. Android is a Linux-based and partly open source, which is more PC-like than iOS. In iOS, the interface and primary features are usually more customizable from top to bottom. However, iOS' consistent design components are sometimes perceived as being more user-friendly.
Developing applications for Android and for iOS may appear very alike to the untrained eye, but the certainty is that each of these two operating systems has its own characteristics. There are several variations when it comes to Android and iOS − both in the technical support of app development and in the process of building an application itself.
In addition, not only at the technical level but also in terms of design and mobile policy. In other words, the entire idea of an app will be depending on the preferred operating system. Developers who are shifting from one operating system to another, with an entirely distinct programming language, will notice the differences.
Different Design
iOS and Android both highlight several fundamental differences in design. In distinct, we can regard that the common feature of Apple’s pictograms, icons and buttons is their minimalistic, compact design. Android web designers are inspired by an almost equal Material Design idea. In that way, the lack of grotesque, large icons and lines is alike for both iOS and Android development. Besides, the desire to implement a sensory panel on mobile devices (excluding the necessary to use physical buttons) can be distinctly sketched in the latest versions of Android OS. Let us also perceive the form of multitasking panels on the two operating systems. iOS has a separate miniature window; Android has interchangeable tabs that fit across almost the entire screen. The platforms also have various styles of buttons, with floating buttons that cast shade on Android devices, and the more stylistic mild and aesthetically advanced design of iOS. This rule also pertains to icons: iOS creators require the lines used in icons too as thin as possible (as opposed to Android).

Testing both the app
An app’s testing frame is a fundamental part of the mobile app development process. This likewise pertains to games and other kinds of applications. One must assure that the app he is developing, works faultlessly. The iOS simulator and the Android emulator are models, which are often used to test this.
A substantial variation is that the iOS simulator is greatly faster than its Android equivalent. However, the Android emulator has the corresponding advantage of being a powerful virtual machine including CPU, which makes it more realistic than its iOS equivalent. In fact, the iOS simulator often fails to provide detailed and genuine representations of Apple devices.

For this reason, it is important to carry out numerous tests on real mobile devices to see the app’s communication flow and identify possible bugs.

Programming Languages
The subsequent important factor that weights a lot in your differences between Android and iOS operating systems is the programming language. This will assist you to accomplish the desired product. We can also see the contrast between Apple and Android in the programming language. If you want to build an Android app, the most popular language used is Java, although Java for Android is a bit distinctive. Another language that was chosen by Android programmers was C++ for which were made also changes for the more fundamental experience. Lately, Kotlin was added, as an official Android language is compatible with the other ones. You can read more about that on Google. While iOS programmers were using Objective – C, Apple launched Swift as the official language for iOS apps in 2014. It is not difficult to learn its syntax and the benefit is that it is built for this principal purpose, for supporting developers to develop mobile apps that run on Apple devices.

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Building an application for Android and iOS separately is the best decision you will ever make. But why? Here are the key differences why you should make difference apps for Android and iOS.