Why would you need an app for cryptocurrency news? Just open your browser and type in coindesk.com or cointelegraph.com. Its all the same news with slightly different headlines. Their websites should be phone friendly, although I honestly have not accessed them through my phone just yet. So I would not know. And in any way you would need an internet connection for either news app or browser. It just seems a bit strange to me. Like microwaving pop-tarts when you have a toaster. Just how many seconds of your time are you trying to save? 
Having to open apps on phone just to get bitcoin news is a lot of work. I know it is the OP's preference but he or she needs to consider the amount of stress they have to put up with just to get the crypto news. Also, they have to constantly deal with the ads pop ups that accompanies using those mobile apps which I find really annoying. All the OP need is a chrome browser and whenever they want crypto news just go and search for " Bitcoin news now", or " Crypto news now" or whatever keywords you want then go ahead and filter what you want. It is that simple instead of an app that would occupy your phone space, make you annoyed and leave you vulnerable to hacks and other security threats. Totally not worth it.