Ads are annoying
I am fine with so called free apps showing ads for example at the bottom of the screen. But in this case every time I want to use the app ad windows are popping up and blocking out everything else. Sorry, but that renders the app useless.
Ose Iri about
PerfectReader Classic - Beautiful PDF Reader with Unique Text Reflow, Sepia/Night/Daytime reading modes, plus High-quality Text To Speech (Free version), v3.0.0