Handwriting reads:

Nah

use whatever program you want!

Just be sure to include direct links to where you obtained the items, as well as item name & quantity

Oh! But you need to be able to share it with me to transfer your inventory to the website

I'm not entirely sure how transferring inventories will work yet, a lot of items are probably going to be reworked. But regardless these should all be good to have readily available!