When comparing ReadEra vs Aldiko Book Reader Premium, the Slant community recommends ReadEra for most people. In the question“What are the best eBook readers on Android?” ReadEra is ranked 4th while Aldiko Book Reader Premium is ranked 16th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Open and read book files in EPUB, PDF, DOC, RTF, TXT, DJVU, FB2, MOBI and CHM formats
Pro Very fast
Pro Completely free, no ads anywhere and anytime
Pro Supports chapters, bookmarks and page style
Pro Supports TTS
Pro Attractive interface
Looks well made and not just a txt editor or something.
Pro Kids mode
Makes it easier for kids to use the app.
Pro Customizable reading settings
Aldiko supports many different reading options such as text alignment, text size, background color and brightness.
Pro Free advertisement supported version
Aldiko offers a free version of the app that features in app advertisements as well as less features. This allows users to try out the app in order to see how well it runs and if they like it in general.
Pro In app eBookstore
Aldiko provides an online eBookstore within the app making for a pretty convenient experience for those that do not want to sideload and import their eBooks.
Pro Cloud storage
Aldiko offers users the option to store their eBooks on cloud storage sites such as Dropbox, which is great for users with low storage devices or multiple devices.

Pro Can be used to read Adobe DRM content
Aldiko Book Reader Premium supports Adobe DRM content that has been purchased from an assortment of eBook retailers that support downloads of Adobe Digital Edition versions of .epubs.
Cons
Con No light mode
No light mode for the menu. Unusable if you have astigmatism.
Con Not many settings
Con Slow animations
Con Image sizing is wrong compared to other readers
Con Images aren't has sharp as other readers
Images don't look like they are supposed to unless you full screen the image.
Con Paid
Con Page turning is slow
Compared to other popular eBook readers on Android the page turning animation/function is slow.
Con Heavy on resources
Noticeably slow on weaker devices compared to other apps on this list.

Con Recent versions have substantially more ads

Con Recent versions have brittle DRM loading
Adobe ACSM loading used to be rock-solid, but this has become brittle enough to simply not function on at least one device as of recent releases.
