Development journal

Posts tagged: Observability

Published notes filed under this topic.

Engineering process

Choosing mobile layout targets from production logs instead of device guesses

11 min read

Written by: Jonathan Reis on Jul 16, 2026

How we used Loki user-agent logs, iPhone model usage data, and mobile screen-resolution stats to choose practical aspect-ratio targets for a React Native game layout.

React Native Mobile layout Observability UX Product analytics

React Native Web

Playing the same WAV files in Expo Web and a React Native app

8 min read

Written by: Jonathan Reis on Jul 2, 2026

How we reduced the gap between Web and app in an Expo/React Native game by replacing synthetic tones with bundled WAV assets and configurable audio logs.

React Native Expo Web Audio Observability

React Native performance

Measuring perceived latency in React Native when frame metrics are not enough

7 min read

Written by: Jonathan Reis on Jun 28, 2026

How we measured React Native response time from tap handler to state update and paint when frame stats did not explain what players felt.

React Native Expo Performance Observability Mobile Games