Simultaneously the most convenient and inconvenient things on the planet.

It's obvious why they're convenient. Instant information in the Information Age. Instant communication.

What's less obvious is why they're inconvenient.

Put simply, they don't work on your schedule. They buzz and vibrate at the oddest of times. They remind you of things you don't really need to be reminded off.

Smartphones come with an innate warning.

Don't use me too much. Don't let me control your life. Turn off all notifications. Check things on your own time.