A nice improvement with some useful additional features. However if reading through a long list of articles and additional articles are added (synced in background) whilst reading, duplication occurs which is annoying. This is not a new bug and was present in the previous version.
app version: 4.0.0
android version: 4.4.2
device: LGE LG-D838 (MSM8974)
memory: normal
speed: 14 in 57