"In addition, apps may not mine directly for cryptocurrencies, unless the mining is performed in the Cloud or otherwise off-device", it stated.
While the idea of mining cryptocurrency on an iPhone is nearly laughable, the message doesn't appear to be targeting apps built for the goal of mining cryptocurrency; those were already banned in a 2014 update.
"With the Health Records API open to our incredible community of developers and researchers, consumers can personalize their health needs with the apps they use every day".
The company also warned developers that any apps that facilitate initial coin offerings (ICOs) and cryptocurrency futures trading must come from established banks and approved financial firms.
Cryptocurrency mining is a process which requires a lot of computational power.
"Apps should not rapidly drain battery, generate excessive heat, or put unnecessary strain on device resources".
The update also attempts to halt rising concerns referred to as phone cryptojacking.
The iPhone isn't a great cryptocurrency miner, especially compared to special mining machines, but that doesn't mean that a surreptitious app couldn't mine tokens like Monero in the background. Although users will still be able to manage and trade cryptocurrencies on their Apple device, this move basically kills the generation of cryptocurrencies via Macs and iPhones (at least through the official app stores).
For virtual currency holders who use Apple devices, the good news is that digital wallet and cryptocurrency exchange apps will still be permitted.
Apple's new guidelines "sound like they're nearly written in response to what Onavo and others have been doing", said Will Strafach, a researcher who has studied Onavo Protect and focuses on the security of Apple's iOS mobile operating system.
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