There is no ability to adjust the margins and the font size does not scale. There is very limited font options and there is no measure of time left in the chapter or book. I own multiple Kobo devices and now using this app with an e-ink android device and my phone has made me rethink my use. The Kindle and Nook apps are markedly superior, as are the open reading platforms. These seem like bare minimum features for this type of service and I am now considering buying ebooks from Amazon instead.