As another reviewer pointed out, on most Android devices there is a significant pause after each line, which ruins the whole experience. I have tried several different documents on two mobiles with Android and none of them worked properly.
Aside from that, the product and voices are fine at this price. But it is impossible to get used to the pause at the end of each line and the developers of the product have already stated that solving this crucial issue is not a priority for them, so I will have to refund.