Its very hard to see the fees paid on past transactions- I looked but could not see them in any records on the wallet...at least not at first until I looked more...by looking under the globe symbol for 'manage your account'...not easy to find.
But I knew I saw them somewhere in the process of past payments so I just made one of 10000 sats to myself to another LN wallet- coinos and the fees cost was flashed up on the screen as the transaction processed 89 sats- but again there is no record anywhere I can find and once the screen flashup is gone I cannot find the fees cost.
Edit- Correction I have found the fees from past transactions can be found and its interesting reading. for a 1 sat payment a fee of 1 sat is charged. I never get charged that using coinos.io for such small payments.
So there you are 89sats on a 10000 sats transaction- maybe small potatoes but your fees charged need to be transparent and easily found - yes if you look they can be found but not easily imo.
So yes still much higher fees than coinos.io wallet.