ErrorGym

ErrorGym is a mobile + web AI-assisted practice app that focuses on the fastest way to improve: drilling your specific errors, not generic lessons. You record short attempts (e.g., solving a problem, speaking a phrase, playing a riff, writing a paragraph). The app tags what went wrong using lightweight AI plus user confirmation, then generates “micro-drills” that isolate the failure (timing, recall gap, misconception, weak sub-skill). It schedules these drills with spaced repetition, but only for the error patterns that keep recurring. A simple dashboard shows your top 5 error types, time-to-fix, and which drills actually reduced them. It’s realistic about limits: it won’t replace a coach, and it won’t magically teach advanced domains without good input. It’s built to be a companion that makes practice more efficient and less random.