All Articles
Placing Native Ads in a Masonry Wallpaper Grid: Designing the Lifetime of an Ad Cell
One native ad in a masonry gallery pushed memory from 180 MB to 420 MB over twenty minutes of scrolling. Here is why cell recycling and ad object lifetime never line up, the pool-based implementation that fixed it, and how I picked the insertion interval from measured numbers.
Regenerable Zones in Rork Max Code: Keeping the Freedom to Rebuild
Generated code carries an invisible asset: the option to throw it away and rebuild it. Every hand edit quietly expires that option. Here is how I track it with a ledger and CI checks across six live apps.
Test Generated Purchase Code Before You Touch Sandbox — Automating Refunds, Expiration, and Failures with SKTestSession
Rork Max generates StoreKit 2 code that proves people can buy. It does not prove refunds, expiration, or failed purchases are handled. Here is how to cover those paths with SKTestSession before you ever open Sandbox.
A Yellow Warning in Dev, a Crash on Resume — Functions in Route Params
Rork generated navigation code that put a function and a Date into route params. In development it was only a warning. After the OS reclaimed the process, resuming the app crashed with params.onFavorite is not a function. Here is the cause and the fix.
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.
My Rork sleep timer faded out on time — but the sound didn't
Rork writes sleep-timer fades against the wall clock with setInterval. The numbers say 30 minutes, but the real audio fades early or cuts out abruptly. Here is how to drive the fade from the actual playback position, why a logarithmic curve sounds natural, and the honest limit of JS fades when the screen is locked.
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.
Designing Seams That Survive AI Regeneration in Rork
Every follow-up prompt to Rork can quietly wipe out logic you wrote by hand. Protecting it with prompts is a patch, not a fix. Here is how to separate generated code from code you own, and draw a boundary that regeneration cannot reach, with working Zustand and service-layer examples.
Adding a Single Zod Validation Boundary to Rork's Generated Fetch Code
The network code Rork generates implicitly trusts the shape of the response. When the API shifts, the screen quietly goes blank. Here is how to slip a single Zod parse layer between the generated UI and the network to make failures predictable, with numbers from real operation.
postMessage Is Fire-and-Forget — Designing a Correlated Request/Response Bridge Between a WebView and React Native
postMessage between a WebView and React Native is one-way, so you never learn whether the work you asked for actually succeeded. Here is a typed request/response bridge, with correlation IDs and timeouts, built in working TypeScript.