I have yellow physical OV-chipkaart with activated NS Flex subscription (Dal Voordeel). With this subscription I can travel with 40% of discount during off-peak hours and weekend using physical yellow card.
Mobile NS App also allows user purchase tickets. It is possible to purchase usual ticket and ticket with 40% discount.
I cannot understand when I can purchase online tickets in the mobile app with 40%?
Can I purchase online tickets in the mobile app with 40% if I have NS Flex subscription, but I have no physical card (forget somewhere at home or work).
In which conditions it is possible to purchase these tickets with 40% in Mobile app?