Is there a limit for read and unread items?

anim8_me 6 aastat tagasi uuendaja Andrius Žilėnas 5 aastat tagasi 1

Other online readers will only keep track of read/unread items for 30 days, is there any such limitation with Flow Reader?

I've in my feeds lot of old items: 2yr or even older, found oldest 9yr.