At first glance these two platforms are very different. But if you start thinking about them from a developer’s standpoint, you will see many similarities. Both systems have: 

• A language to create apps (software for Android is written in Kotlin, software for iOS is written in Swift). 
• A package of libraries (Android previously used Java, iOS used Objective-C; recently iOS received SwiftUI, and Android got a whole series of new libraries). 

There is an opinion that developing for Android is a bit more difficult than for iOS. Historically iOS has been supporting no more than ten devices (several versions of iPhones, iPad, smart watch, and so on), while Android runs on a much larger number of devices, thus making it much easier to get bugs from various device vendors.  

Our developers have collected the most useful links for to get a deeper understanding  of the differences between the systems and to decrease the number of mistakes while developing for iOS:  

To be the first to receive any news about iOS development, subscribe to Swift Weekly Brief. The newsletter outlining major news is posted every Thursday.   

To stay abreast of all developments if you do not like reading, listen to the podcast Swift Unwrapped. 

Those who make Twitter their main source of information, subscribe to these people: 

• steipete   
• slava_pestov   
• jckarter   

To improve your practical Swift skills, we recommend watching the following tutorials:  

• Hackingwithswift. The coder, writer, and speaker Paul Hudson is one of the few people who create good tutorials. He has been developing apps for various devices: iPhones, iPads, Apple Watch, Apple TV, Android, Windows, Windows Mobile, Xbox 360 and Linux, using Swift, Objective-C, Python, PHP, Java, and C#. His tutorials are in English, but they are simple and easy to understand.   
• Raywenderlich. Several hundred people work on these tutorials. The huge community carefully performs three-stage checks to guarantee 100% quality output.