Hi, I am working on a learning app for children myself right now (not speech based, though). Here are my thoughts: * The UI is very appealing. * Setup in the beginning is a bit convoluted. Start with defaults instead of bombarding users with options. * BUG: Whitespace between words is not stripped and creates false results if there is more than a single whitespace. * Replaying generated speech actually creates new output instead of merely replaying. This could be optimized. It wastes compute (unless intentional, of course). * I was really surprised when out of nowhere a game popped up. That felt a bit cringe. My general recommendation: Focus on the core functionality. Right now, there is a lot of distraction. That sharply contradicts the idea of setting "focus time" with a timer. Good luck.