Has anyone found a good learning app for their toddler? Do I need something that helps with reading, basic math, problem solving, etc.?

I'm willing to pay for lessons if it keeps him interested and learning for the next year or two.

My child is currently studying with a math tutor for 1st grade https://brighterly.com/1st-grade-math/ . I had a hard time explaining to her how to solve the examples correctly so that she would understand everything, and the tutor found an individual approach and made math accessible to my child.

If the curriculum is truly tailored to the child's level and covers different math topics, that's good. I think it will help get the child interested in doing more math.