If you don’t want to fool with the cards at all, I highly (Highly, HIGHLY) recommend the Scripture Box “app.” This has been a God-send to me! I don’t usually do technology, but this is so easy to use and the designer is on here often and listens to what we say. It is designed to work like the box with cards, automatically adjusting the Scriptures (or whatever you’re memorizing) to the correct spot. Plus I get an email at 7am every morning with the day’s memory work! Love it!! The cost is extremely affordable. $4.99 if I remember correctly.
I think the link is scripturebox.com