The rules change coincides with the company's introduction of beta versions of its forthcoming iOS, macOS, tvOS and watchOS releases at its annual developer conference. This helps us improve and operate the Onavo service by analyzing your use of websites, apps and data.
"Apps facilitating Initial Coin Offerings ("ICOs"), cryptocurrency futures trading, and other crypto-securities or quasi-securities trading must come from established banks, securities firms, futures commission merchants ("FCM"), or other approved financial institutions and must comply with all applicable law", read the unchanged policy first unveiled in December.
The fruit-themed device maker has now expanded its requirements.
Wallets coded by developers enrolled as an organisation are also allowed, as are apps that facilitate transactions or transmissions of cryptocurrencies, provided these are offered by the exchanges in question.
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And apps won't be allowed to offer cryptocurrency in exchange for letting them complete other tasks such as downloading additional apps or posting on social networks.
"Apps should not rapidly drain battery, generate excessive heat, or put unnecessary strain on device resources", Apple's website states.
That's easy to declare but hard to enforce. Though malicious mining software hasn't been as big of a problem for Mac and iPhones as it has for its competitors, a calendar app created by Qbix was removed from the App store after it was found to be mining coins on devices even when they were shut down.
Apple has now chose to take stern steps to prevent such scenarios from happening again, mainly because mining operations tend to drag down the OS, making the entire device slower, and diminishing the well-crafted macOS and iOS experiences.
But at least devs seeking to remain in Apple's good graces will look for other money-making options.