Came here to say this: Anki is infinitely better than some scammy ai enabled nonsense.

The challenge is Anki relies on the student being motivated to pursue the education. The solution to that is the student seeing the value and fun in what they’re learning. That can partially be provided by gamification, but really a passionate teacher with genuine enthusiasm is the best.

Shipping shouldn’t be free. It costs money to transport goods. If you’re not paying for that cost then at best it’s included in the price of the item, but more likely it’s a corporate ploy to squeeze out competition or a psychological trick to get you addicted to frivolous spending.