I read all my books I have converted through Calibre 4.15, on my Android tablet
No problem.
I still use my old kindle 2nd generation also by downloading books by USB through Amazon. Then transfering them to the kindle.
That is perfect forwhen I sit in the garden and read.
As cannot see the screen on my tablet then.
However the micro socket i plug my kindle into to charge does not always work.
So have been thinking about buying a new kindle for that.
But won't it stop me converting the books I buy andsaving them into calbre
Which I have been using for ages and helps me stop buying the same book twice
As books seem to change tiles and covers