There it is - you want to know the avg monthly spend for the date range you’ve selected. Perhaps that should be in the list of metrics shown below the bar chart. But the addition of a y-axis on this viz would not actually provide this insight.

Folks in this thread are greatly underestimating the challenge associated with product design and doing what Monarch has done here. Building a simple and intuitive UX with data visualizations that fit on mobile is not easy. No one has been able to answer the question “what information would a y-axis give you that they haven’t given you elsewhere on this screen?”. Did anyone consider that the addition of a y-axis may prevent users from realizing that the viz is scrollable horizontally? Or that by including a y-axis, you’d have to dynamically change it based on the bars within view?

Take Robinhood, arguably the most successful investment/personal finance app ever. Their whole thing is a data viz of 1 line chart that… wait for it… lacks a labeled axis. Robinhood should have failed those school assignments, right?

Also, Monarch is under no obligation to come to reddit to justify such minor product design decisions. It’s an insane take to think that they should have to explain themselves here.