Recently, in the last month or so, the Newsblur iOS app on my iPhone 5S has become extremely laggy.
Especially in the “list of stories” view and the “built-in browser” view, gestures take a noticeable amount of time to take effect, scrolling is extremely stuttery.
The “swipe to go to the next entry” is almost impossible to trigger.
Note that nothing else on my phone is showing behaviour like this - the rest of it is very smooth.