Android Reading App?
 

Is there an Android reading app that will let me read eBooks?

Do not want to pay for one, unless it was just a couple of pounds.

Using a HTC Desire 530 with Marshmallow on it at the moment.

Appreciated.

There are lots of them.

Most ebook vendors (Amazon, Kobo, Google Play Books, etc.) have a dedicated app linked to their store which also reads sideloaded books.
But the independent apps "Moon+ Reader" and "Mantano" seem to be the most popular.

Cool Reader (3.1.2-103) meets my needs in a most satisfactory way. Plenty of adjustments to format books just the way you want them.

Mantano app has been renamed 'Bookari'.

I use Moon+ or the Kindle app on my phone.

Is there such an app that will sync between my Kobo Glo + iPhone 6 + Samsung Galaxy Note 4? I use Calibre for library management but thought that the Kobo app only syncs if it's a Kobo-purchased ebook.