Difficulty is desirable

Robert Bjork's concept of desirable difficulties upends the intuition that learning should feel easy. Conditions that make learning feel harder in the moment — spacing, interleaving, retrieval practice — actually produce stronger long-term retention than conditions that feel fluent.

This is why Repeatica doesn't show you the answer before asking the question. It doesn't give hints by default. It asks you to retrieve the answer from memory, rate your confidence, and move on. The struggle is not a bug — it's the mechanism by which memory strengthens.

Easy reviews feel productive but accomplish little. The card you can answer without thinking is a card that doesn't need reviewing. Repeatica's algorithm naturally increases difficulty over time, ensuring that each review session pushes you just enough to keep the memory alive.