Field notes

The Build Log

In-depth field notes on shipping, monetizing and defending mobile apps — from the builder of AppSentry.

2 min read revenue pricing aso

90 Days of Country-Level Revenue: What the Data Changed About My Pricing

One 90-day revenue-by-country table rewrote my assumptions about where my users are, what they're worth, and which languages I should ship next.

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2 min read android force-updates ops

The Kill Switch: How I Ship App Fixes Without Waiting for Play Store Review

A remote config flag + a forced-update gate turned a 3-day review cycle into a 3-minute one. Here is the exact mechanism — and the screenshot it runs behind.

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2 min read admob telemetry fraud

Your Ad Dashboard Isn't Lying. It's Just Hiding the Right Things.

Aggregated fill-rate hid a failing unit for weeks. What device-level shows-vs-loads actually tells you — and the three numbers I check before anything else.

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