Sort of... you can go into Safari, choose a website, then click the bookmark icon, select the @ tab, click Subscriptions and then click Add Current Site.
Otherwise Reeder for IOS is a great RSS reader. https://itunes.apple.com/us/app/reeder-2/id697846300?ls=1&mt=8
Answer from scoutelder on Stack ExchangeSort of... you can go into Safari, choose a website, then click the bookmark icon, select the @ tab, click Subscriptions and then click Add Current Site.
Otherwise Reeder for IOS is a great RSS reader. https://itunes.apple.com/us/app/reeder-2/id697846300?ls=1&mt=8
You could use Reading List on Safari. It's syncs automatically between all your iDevices. Reading List feature has been available on iOS since the launch of iOS 7. Some apps like TweetBot allow you to directly send links to the Reading List which you can catch up later.
What's the best rss reader for iOS that's not subscription-based?
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I want one thats either free or a one time purchase, as well as having the ability to import and export feeds.
If you don't mind piggy banking off of Google Reader, I've seen many apps that successfully use that as the aggregator. To have your application handle multiple feeds would be very resource/network intensive, in my opinion. A good example of an excellent Reader based app is Reeder.
If you still want to create your own custom aggregator solution, it still might be useful to work off of Google Reader to start (for development purposes) to at least understand how you'll handle multiple feeds rolling in. Also, I'd look into more server-side based solutions for providing that information as I still keep my opinion that handling that in the app itself would be excessive.
You might want to check out NSOperationQueue and add each xml to be parsed to the OperationQueue.
Here is the documentation for it: http://developer.apple.com/library/mac/#documentation/cocoa/reference/NSOperationQueue_class/Reference/Reference.html