All Articles
Adding React Compiler to Expo Let Me Delete 41 Hand-Written memo Calls
I enabled React Compiler on Rork-generated React Native screens and measured the rerender counts with Profiler. Here is how I decided which memo and useCallback calls were safe to delete, how to find the components the compiler bailed out on, and how to catch regressions in CI.
The Termination That Never Shows Up as a Crash — Reading JetsamEvent in Rork Apps
Crashlytics is silent, yet reviewers write that the app closes by itself. Most of the time the OS killed it for exceeding its memory limit. Here is how to read JetsamEvent reports and design an image-heavy app's memory budget from measured values.
Every Key You Ship Is Public: Secret Boundaries and Rotation for Rork-Generated Apps
Unzip your own .ipa, run strings, and your environment variables are right there in plain text. Here is how I sort keys into three tiers, move the dangerous ones behind an edge proxy, and keep a rotation runbook that assumes leakage.
Getting Rork Max's Swift Through Swift 6's Strict Concurrency Checking
A field record of taking a Rork Max-generated SwiftUI app through Swift 6 complete concurrency checking: 217 warnings cleared target by target, where @MainActor actually belongs, and measured before/after numbers.
Holding Layer Boundaries in a Rork-Generated Expo App with ESLint and dependency-cruiser
Long-lived Rork-generated Expo apps quietly accumulate screens that import the API client directly. Here is how I froze 214 existing violations as a baseline, eliminated 17 circular dependencies, and made CI reject anything new for 38 extra seconds.
When Amplitude's Funnel Improved Overnight — Field Notes on Catching Event Schema Drift With a Self-Audit
In a Rork-built app, the Amplitude funnel showed signup-to-purchase conversion jumping from 8% to 19% overnight, yet revenue stayed flat. The cause was a property-name drift that inflated the count. Field notes on measuring the drift with an event contract and a runtime validator, then tightening it in stages.
Your SVG Icon Shows in Expo Go but Vanishes in a Build — Making SVGs Render Reliably in Rork Apps
When a .svg import renders nothing, throws a resolve error, or ignores your theme colors in Rork and Expo apps, here is how to fix it with metro.config.js, react-native-svg-transformer, and currentColor — with working code.
Building a Segmented Control With a Sliding Indicator in Reanimated
The stock segmented control looks out of place on Android. Here is a custom Reanimated component that measures each segment and slides the indicator, with complete code plus UI-thread rendering, accessibility, and RTL handling from real shipping notes.
Working Around Rork Max's 20-Geofence Wall with Dynamic Re-registration
In a native Swift app generated by Rork Max, geofences you registered quietly stop firing past a certain count — and it's almost always iOS's silent limit of 20 monitored regions per app. Here's a dynamic re-registration design that keeps only the nearest 20 live, plus a Swift implementation you can drop in.
When the Device Runs Out of Space, What Should Your App Protect?
Design Expo/React Native apps that assume writes can fail. Free-space budgets, LRU reclaim, data-protection tiers, and telemetry that surfaces silent failures — drawn from running six wallpaper apps.
The App Icon Badge Still Says 3 — Rebuilding Expo Badge Counts Around a Single Source of Truth
Why an Expo app's icon badge drifts out of sync with real unread counts and refuses to clear — and how to rebuild it around a single source of truth, with working recompute-and-sync code and the production pitfalls that bite you.
When In-App Review Prompts Fire but Your Ratings Never Move — Field Notes on Measuring Display Opportunities and Timing
You wired expo-store-review into your Rork app, yet the star count won't grow. The OS silently suppresses the dialog, so calling it doesn't mean it shows. These are field notes on measuring display opportunities and redesigning timing.