What factors are causing the sudden 50% decrease in new user signups for PhysicsWallah's mobile app in the past week?

Introduction

The sudden 50% decrease in new user signups for PhysicsWallah's mobile app over the past week is a critical issue that demands immediate attention. This analysis will systematically identify, validate, and address the root cause while considering both short-term and long-term implications for the product.

I'll approach this problem by first clarifying key details, ruling out external factors, and then diving deep into internal metrics and user behavior. My goal is to pinpoint the most likely causes and propose actionable solutions.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking there might be a recent app update. Has there been any significant changes or updates to the app in the past 1-2 weeks?

Why it matters: Recent changes often correlate with sudden metric shifts. Expected answer: Yes, there was an update. Impact on approach: If yes, I'll focus on changes in that update. If no, I'll look at other factors.

• Considering user segments, I'm curious about the distribution. Is this 50% decrease uniform across all user segments or more pronounced in specific groups?

Why it matters: Helps identify if the issue is global or segment-specific. Expected answer: The decrease is more significant in certain segments. Impact on approach: If segment-specific, I'll dive deeper into those particular user groups.

• Thinking about the funnel, I'm wondering about conversion rates. Has there been any change in the conversion rates at different stages of the signup process?

Why it matters: Pinpoints where in the funnel users are dropping off. Expected answer: There's a significant drop at a specific stage. Impact on approach: I'll focus on that particular stage of the signup process.

• Considering external factors, I'm curious about marketing efforts. Have there been any changes in marketing campaigns or spend in the past week?

Why it matters: Marketing changes can significantly impact new user acquisition. Expected answer: No significant changes in marketing. Impact on approach: If no changes, I'll focus more on product and technical issues.