PaceMan.gg is a community-built mobile app for tracking live Minecraft speedruns, built entirely with Expo SDK. The post covers three main technical areas: a push notifications infrastructure using expo-notifications with an Express.js microservice backend, WebSockets, MySQL, and Redis; API security using @expo/app-integrity (App Attest on iOS, Play Integrity on Android) to restrict backend access to genuine app installs; and a native-feeling header UI using expo-glass-effect with support for iOS 26 Liquid Glass. The app was developed cross-platform without a Mac, leveraging Expo's cloud build services.
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The PaceMan.gg mobile appPush Notifications using Expo NotificationsSecurity with App IntegrityNative Header with expo-glass-effectFuture plans for PaceMan.ggSort: