I bought SecureReader for a few reasons, to have one offline place for all of my manuals for different items, had about 50 or so different manuals and some other pdf docs. Used it on occasion.
After apple forced me to upgrade to ios 11 on my ipad, I could not open GoodReader, checked if I had the latest version, guess what, they want more money. I emailed them, they told me I have to buy the new version or I have to get a computer, download an app and fetch all my docs to the computer. I do not have and od not want a computer.
This is just bollocks, I am still on the same device and I bought SecureReader , ai what it to work.
Do not buy this unless you want the same issue down the road. In fact I I for one will make sure I do not buy anything made by these guys.