The Forgetting Problem

In 1885, Hermann Ebbinghaus published a monograph that would define memory research for the next century. Using nonsense syllables to isolate raw memory, he demonstrated that human memory decays exponentially — within an hour, we lose over half of what we learned. Within a day, two-thirds. Within a month, nearly four-fifths.

This isn't a character flaw. It's how memory works. The brain is relentlessly efficient, discarding anything it deems unnecessary. The problem is that the brain's criteria for 'necessary' have nothing to do with what you actually want to remember.

Most learning tools ignore this reality. They help you capture information, maybe organize it, then wish you good luck. Repeatica starts from the opposite premise: capturing knowledge is the easy part. The hard part — the part that actually matters — is making sure it stays.