[yokisan]

"Because it's a todo app" is an obvious response to the title but the content is interesting.

Trello Gold with emoji support and custom backgrounds was a weak proposition and they could have moved into enterprise faster. Still, it's amazing they did as well as they did.

Kanban boards and Chat apps are the new todo lists - ten a penny - which makes people dismiss the notion of building a business around such a trivial feature.

This is a mistake. Most of those apps are badly designed, meaning for those looking to eke out a living rather than break $1 billion, there's still plenty of opportunities.

For example, Diigo the highlighting app is relatively unknown but is a hit with educators and so makes cash in a corner where few competitors are looking. The top stopwatch on The Play Store makes over $400,000 with in-app sales.

And Wunderlist sold for $125 million. And Todoist is profitable.

It's a big Internet out there.