The Comma That Fell to the Start of a Line: Rork, Quote Cards, and Japanese Line Breaking
React Native's Text component does not guarantee Japanese line-breaking rules. Here are the violation rates I measured, a WORD JOINER implementation that survives copy and VoiceOver, an onTextLayout audit harness, and how Rork Max (SwiftUI) differs.
On-Device Image Classification: TFLite on React Native or Core ML on Rork Max — How I Chose After Building Both
Adding on-device image classification means choosing between TFLite on React Native and Core ML on Rork Max. I built the same feature both ways, measured the end-to-end breakdown, and worked out what the decision actually hinges on.
Half the Bytes, the Same Wait: What AVIF Actually Cost My Wallpaper Apps
Switching to AVIF cut my transfer bill in half and did nothing for perceived speed. Here is the transfer-versus-decode breakdown, the Accept-negotiation trade-off, per-device fallback tiers, and the staged migration order that finally worked across six apps.
Long-Press Context Menus for a Gallery Item in a Rork Expo App
Long-pressing a wallpaper card does nothing, yet iOS users expect a preview and a menu. From why Pressable alone falls short, to a native context menu with zeego, resolving the scroll-vs-long-press conflict, wiring up save and share, and a custom overlay fallback for Android — all with working code.
Undo That Jumps to the Wrong Place — Designing Edit History You Can Trust
Snapshotting the whole state on every edit crushes memory after a few dozen steps. Here's an undo/redo built on command history plus snapshots, with coalescing, a depth cap, and cross-session persistence, in working TypeScript.
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.
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.
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.
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.