I recently downloaded a virtual assistant that promised to ease the burdens of modern parenthood. The app is called Yohana, and it offered to handle a pile of tasks on my behalf. It suggested enlisting a professional to wash my windows, scheduling a lesson with a “private sports coach” or planning a “stylish and sustainable” Earth Day party featuring décor, recipes, activities and party favors, none of which interested me. Finally it volunteered to produce a “chef-curated menu” for Passover.