Mobile phone — main platforms?

The main mobile platforms are:

• iOS — an operating system from Apple, used on iPhone and iPad. It is characterized by strict app requirements and a closed ecosystem.
• Android — an operating system from Google, open and widely used, employed on many devices from various manufacturers.

These two platforms cover the vast majority of mobile devices worldwide. When testing mobile applications, it is important to consider the features of each platform: different OS versions, interface characteristics, app behavior, and screen resolutions.