However, mining for cryptocurrency is only acceptable if "performed off-device", such as in the case of cloud-based mining. But the company later pulled the app, reportedly because the software's mining function could drain a Mac's battery life and cause excessive heat. Apple's updates to the App Store guidelines now prohibit developers from making databases of info gleaned from address books, nor can they request access to contact info under one pretense and then use it for something else - they have to get consent for what they're actually using it for.
Apple also has an existing section addressing cryptocurrency apps on its App Store that's been in place since about 2014.
Note: Apps for trading cryptocurrencies and tracking prices will not be affected by the changes. Apple allows apps like Coinbase and Robinhood to enable users to trade Bitcoin, Ethereum, and other cryptocurrencies, so it's not a complete ban on mobile crypto. Spotted by AppleInsider, the new rules say that "apps, including any third part advertisements displayed within them, may not run unrelated background processes, such as cryptocurrency mining".
The promising thing here is that Apple seem very open to the idea of new apps being produced which will integrate the use of cryptocurrencies.
The Book Store tab makes it easy to browse all that Apple Books has to offer, including Top Charts, Staff Picks, Editorial Collections, and Special Offers & Free.
Apps facilitating Initial Coin Offerings (ICOs) must come from "established banks, securities firms, futures commission merchants ('FCM'), or other approved financial institutions".
If you haven't worked it out yet, this news is very good news and will see some brand-new cryptocurrency-based applications go live on the App Store.
Apple previously declared that apps transmitting approved cryptocurrencies had to do so in compliance with applicable laws. Cryptocurrency apps can't offer users virtual coin for tasks like downloading other apps, getting other users to download the app, or boosting social media activity.