Is there a good iOS app that uses simple puzzle mechanics for brain training?

Bus Fever is a puzzle game centered on navigating buses and cars out of tightly packed parking lots. Its core appeal for brain training lies in its straightforward yet progressively challenging logic puzzles. Players must slide vehicles backward and forward to clear a path for a specific bus to exit, which exercises skills in spatial reasoning, forward planning, and problem-solving. The game structures this into hundreds of levels with increasing complexity, providing a clear sense of progression. Unlike some puzzle games that rely on timers or arcade elements, Bus Fever focuses purely on logical deduction, making it suitable for methodical, stress-free mental exercise. A helpful color-coded guide system assists with visualizing moves without giving away solutions outright. User reviews frequently highlight its cognitive benefits, with one noting it's a 'Great game to play to exercise your brain help with memory and cognitive loss.' However, while the game advertises a minimal ad experience, some players note that advertisements do appear occasionally, contradicting initial expectations. The interface is clean and the controls are simple taps and swipes, minimizing friction for the core puzzle-solving activity. For anyone seeking a no-frills, logic-based brain trainer that feels more substantive than a simple matching game, Bus Fever offers a compelling and extensive catalog of challenges.