Yes, 888PKR can be accessed from an iPhone through a compatible mobile browser. The current FAQ information describes this game as being optimised for both Android and iOS devices and says that no app download is required for mobile browser access.
This is useful for iPhone users because an Android APK cannot simply be installed on an iPhone. Instead, you can open the 888PKR website in your browser and use the available mobile interface.
Your experience can depend on your browser, internet connection, and the current version of the website, so always use the current official access route.