Looks nice from what I can see but £1.49 is too much to buy just to try it out (at least for me).

The major pain point with the current viewer I use is difficult-to-read comment threads. I can't see any screenshots of comment threads in your app. Are they collapsible? Is the hierarchy clear?

Can you post comments yourself in-app? I remember seeing another app at the same price point that did that.

Good luck anyway!