Thanks a lot for the feedback!
I knew about KOReader before but it doesn't work well with Boyue devices (the Icarus Illumina XL 8 is a re-branded Boyue device), as it crashes and barely works.
I found ebookdroid recently and you are right, it offers nice picture enhancement features. The only problem with ebookdroid is the interface, which is confusing - simple features, e.g. highlight and annotation, require some time to get used to.
On Google Play there are a few PDF readers based on ebookdroid, as you noted, but oddly many seem to strip down the features that make ebookdroid a good PDF application (Document Viewer is an example).
Hopefully Moon+ Reader or Bookari will offer a contrast adjustment feature and a more e-ink friendly interface option, as they are, in my opinion, the best e-reader applications.
Last edited by chromeuser; 05-09-2016 at 10:38 AM.
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