Installs are down 35% on DoorDash's iOS app, what do you do?

This is a classic product diagnosis question. My approach would be to first ask clarifying questions to understand the scope and context of the issue. For example, when did this decline start? Is it specific to certain regions or user segments? Are there any recent app updates or marketing campaigns that coincided with this drop?

Next, I'd brainstorm potential high-level causes, categorizing them into areas like technical issues (bugs, server problems), product changes (new features, UI/UX changes), marketing/acquisition issues (reduced ad spend, ineffective campaigns), competitive actions, or external factors (seasonality, economic shifts).

I would then prioritize these hypotheses and gather data to test them. This might involve looking at app store reviews, crash logs, user behavior analytics, A/B test results, and competitor activity.

Once the root cause is identified, I'd propose targeted solutions. If it's a technical bug, the solution is to fix it. If it's a marketing issue, we might adjust ad spend or creative. If it's a product change, we might roll back the change or iterate on it based on user feedback.

Finally, I'd outline how to measure the success of the proposed solutions and ensure the install numbers recover.