I tried few years ago, and it didn't fit my needs. Just tried again :
- must sign up to use the application
- impossible to select several items to mark them as read/unread (possible in Aggregator, and I can't live without it)
- the grouping is based on the feeds (same as Aggregator), but I'm looking for label grouping ala Gmail
- must pay for the search/label feature
- in text only mode, the items are hard to read. I like Aggregator's way of seeing the source's favicon next to the items
- ads
RSS is free open standard, it's not supposed to change and does not require maintenance. Aggregator's last update was almost 3 years ago and the app still fully works as intended today. I'm not looking for an app that is updated every week for new features.I tried all the free Android RSS readers under the sun, and none has the perfect combo of features I would like.
There's also a premium version which may support some of the other features you've mentioned.
0. https://feedly.com/