AI can help build surprisingly capable apps—if you know how to steer it in the right direction. Follow my tips to save yourself time and frustration.

Voice Mode fabricated answers the last time I used it, but I tested it again to see if it's actually useful now. Spoiler: It is.

There's added help for more than 70 different concepts from math and science, primarily from high school and college-level courses. The concepts come from algebra, geometry, calculus and physics. It's ...