Invisible Rule

Invisible Rule is an offline logic game focused on discovering hidden rules. Each round presents a set of examples that already fit the rule. Without seeing the rule text, players judge whether each candidate fits, using the feedback to build and test their own hypothesis. The app provides four modes: Classic for open exploration with optional rule reveal, Timed for quick induction under a single rule and a countdown, Challenge for limited mistakes with no rule explanation, and Daily Rule for a single fixed rule each day. A local rule library covers number, symbol, color, and mixed categories, and Practice Packs allow focused training by category. The result view summarizes score and accuracy, while history records support progress review. The overall experience is calm and minimalist, designed for short sessions and steady reasoning practice.