It isn’t just about what these typefaces look like, either, but
how they’re used. For example, when entering a new task, the name
of the task is set in Product Sans; when it is added to the list,
it becomes Roboto. Tapping on the task takes you to a details view
where, now, the name of the task is in Product Sans. There are
three options to add more information: if you want to add details,
you’ll do it in Roboto, but adding a due date will be in Product
Sans. The “add subtasks” button — well, text in the same grey as
everything else except other buttons that are blue — is set in
Product Sans, but the tasks are set in Roboto.
Such an odd inattention to detail.