Quote:
Originally Posted by Jean
I already have the custom column added. It works fine on my android phone, it just doesn't work on my Fire.
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Defining the custom column in calibre is not sufficient. You must also tell CC that the column exists. My guess is that you did that on your Android phone some time in the past but have not yet done that on your Fire. Check CC Settings / Grouping drawer / Group/sort on custom columns.
Given that the Amazon and Google versions of CC are identical, you could also do a settings backup on the Android phone then restore those settings on the Fire.