**1. Introduction**

The operating systems Android and Apple iOS are the focus of cyber criminals, the comparative study of the same is of extreme importance because we can know their vulnerabilities and propose methods, policies, and security systems to protect data, mobile phones are small and embedded devices, with peculiar characteristics, allow text messaging and multimedia, because it has memory, processor, and an operating system, which allows greater use of confidential information, handling, and exchange of data between users, videos, and other collaborative work with various social networks, which enables failures in cyber security, the loss and theft of information, due to cybercrime that increases substantially, the mobile phone is vulnerable to cybercrime. The current researches focus on information security that has been

#### **Figure 1.**

*Virus attack on mobile operating system. Source: Quissanga [1].*

very questioned about information theft that every day increases due to the greater number of users without information security education and use mobile devices. The operating systems such as Android and iOS from Apple are now the targets of attackers, besides being very common and this feature makes them easy prey, study of this kind for our society is extremely important, we need to have basic culture of information security, control of our passwords, email, social networks, malicious software, and spies, are the apex of the modern age and information, we must be very careful to avoid irreparable losses.

However, we know that security for phones differs in relation to computers, in other words, viruses also differ in the form of attack, although there are compatible operating systems, but they differ in this perspective in which we refer, in the case of the Android operating system virus does not attack the iPhone system for a very simple issue, its core (*kernel*), that is, in the creation of systems there are different codings and languages and this way the virus is also made of programming language, to happen the attack needs to be made in the same language of the operating system, for this reason, it is important to study them separately (**Figure 1**).

The choice of this topic was in order to know which of the operating systems Android and Apple iOS is more secure and to propose security measures to protect information, since we face many problems with data protection.
