I'm looking to purchase a UK Flexi Season Ticket online, specifically using thetrainline (although I'm ultimately travelling with Thameslink). I would like to get it in QR code format as I believe it's more convenient than carrying around an additional Smartcard.
If I purchase one of these tickets using a Key Smartcard, I can track how many journeys (or more specifically, how many days) I've used so far by holding it up against my phone with the Thameslink app or similar.
If I get the QR code version instead, is there any way to track how much I've used it? I've checked thetrainline's FAQs but they are not forthcoming.