EdTech tool useful in a family setting?

What makes an EdTech tool actually useful in a real family setting? 

A lot of EdTech startups look flashy on demo day, but when it comes to real-world parenting, they're rarely used more than twice.

So I'm curious:
- Have you found any tech that actually fits into your family routine?
- What's something you wish existed that could genuinely help you support your kid's development or learning style?

Founders, parents, educators - all thoughts welcome.