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Google·Product Manager·Onsite - Product Sense / Strategy·Senior

SeniorPrefer not to say
Jun 2026

Summary

Interviewed at Google, got a product estimation question about the Play Store. Pretty standard PM case but the numbers got messy fast.

Questions Asked (1)

Q1

Estimate how much revenue the Google Play Store generates annually.

Product Analytics & MetricsPricing & Monetization
Author's notes

I started with the 30% cut Google takes and tried to build up from DAU estimates for Android users.

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AI HintsAI Generated

Suggested Approach

Break down Google Play Store revenue into its primary components: app sales, in-app purchases, subscriptions, and advertising. Estimate each component using available data and reasonable assumptions, then sum them to get an annual figure. Clearly state your assumptions and show your calculations step by step.

Pro tip: Focus on the logic and structure of your estimation rather than getting the exact number; interviewers care more about your thought process and ability to make reasonable assumptions. Also, consider mentioning that Google Play revenue includes both Google's cut and developer revenue, but for Google's revenue, only the commission matters.

1. Clarify the scope

Define what 'Google Play Store revenue' means: is it gross merchandise value (total consumer spending) or Google's net revenue (commission)? For Google's revenue, focus on the 15-30% commission from transactions and ad revenue.

2. Segment revenue streams

Break down revenue into: paid app downloads, in-app purchases (IAP), subscriptions, and advertising. Consider that most revenue comes from IAP and subscriptions, especially from games.

3. Estimate user base and spending

Estimate the number of active Android users, the percentage who make purchases, and their average spending. Use known figures like global Android users (~2.5 billion) and adjust for active Play Store users.

4. Calculate each component

For each revenue stream, multiply the relevant user base by average spending and apply Google's commission rate. For ads, estimate based on ad impressions and CPM.

5. Sum and sanity-check

Add up the components to get total revenue. Compare with any known public data (e.g., Google's earnings reports) to validate your estimate.

Key Points to Mention

  • Google's commission structure: 15% on first $1M developer earns per year, then 30% (or 15% for subscriptions after first year).
  • Major revenue drivers: in-app purchases and subscriptions, particularly from games and apps like Spotify, Netflix, etc.
  • Geographic differences: higher spending in markets like the US, Japan, South Korea; lower in emerging markets.
  • Advertising revenue from the Play Store itself (e.g., promoted apps) is relatively small but should be considered.
  • Public data points: Google's earnings reports sometimes disclose 'Google Play' revenue or 'Google other' revenues, which can be used as a reference.
  • Trends: growth in subscription revenue and emerging markets, impact of regulatory changes on commission rates.

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.