What caused the sudden 30% decrease in new user registrations on Rightmove's mobile app last week?

Introduction

The sudden 30% decrease in new user registrations on Rightmove's mobile app last week is a critical issue that demands immediate attention. This significant drop in a key performance indicator could have far-reaching implications for user acquisition, growth, and overall business performance. To address this problem, I'll employ a systematic approach to identify, validate, and resolve the root cause while considering both short-term fixes and long-term strategic implications.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking there might be a specific event or change that triggered this. Has there been any recent app update or feature release?

Why it matters: Recent changes often correlate with performance shifts. Expected answer: Yes, an update was released last week. Impact on approach: If true, we'd focus on the update's contents and rollout process.

• Considering user segments, I'm curious if this decrease is uniform across all user types. Are we seeing any differences in registration rates between, say, first-time homebuyers and experienced property investors?

Why it matters: Different user segments may react differently to changes or issues. Expected answer: The decrease is more pronounced among first-time homebuyers. Impact on approach: We'd investigate factors specifically affecting this segment.

• Given the mobile focus, I'm wondering about platform specifics. Is this decrease consistent across iOS and Android, or is it more pronounced on one platform?

Why it matters: Platform-specific issues could narrow down technical causes. Expected answer: The decrease is primarily on iOS devices. Impact on approach: We'd prioritize investigating iOS-specific factors.

• Thinking about external factors, have there been any significant changes in marketing spend or channels recently?

Why it matters: Changes in user acquisition strategies can directly impact registration rates. Expected answer: Marketing spend and channels have remained consistent. Impact on approach: We'd focus more on product and technical factors rather than marketing.

• Considering data integrity, I'm curious about our tracking systems. Have there been any changes to how we measure or define new user registrations?

Why it matters: Ensures we're not dealing with a data anomaly rather than a real issue. Expected answer: No changes to measurement or definition. Impact on approach: We'd proceed with confidence in the data's accuracy.