What's the best Android app for teaching preschoolers letters and numbers with interactive games?

Hungry Caterpillar Play School is a well-regarded educational app tailored for preschoolers, focusing on foundational skills like letter and number recognition through hands-on activities. Developed by StoryToys, it stands out for its colorful, interactive interface that captures children's attention with tracing exercises, puzzles, and a spinning wheel reward mechanism. The app allows kids to practice writing by tracing letters and numbers, which reinforces motor skills, while puzzles challenge their problem-solving abilities in a playful context. Real-world scenarios, such as matching shapes or completing sequences, help bridge learning to everyday concepts. User feedback highlights that children often stay engaged longer with this app compared to others, with reviews noting that the spinning wheel at the end of activities adds a motivating touch. However, some parents mention the app comes with a higher price point, which might be a consideration for budget-conscious users. Additionally, while the content is robust for early learners, it may not scale well for older children seeking more advanced challenges. Minor interface glitches, like occasional lag during transitions, have been reported but don't significantly detract from the overall experience. For caregivers seeking a structured yet entertaining tool to introduce basic literacy and numeracy, Hungry Caterpillar Play School offers a balanced mix of education and engagement, though it's best suited for children aged 3-5 years.