All Articles
Managing Startup Time as a Budget: How I Deferred SDK Init Across Six Apps
Instead of optimizing startup ad hoc, I switched to allocating a per-phase time budget and defending it. Here's how I deferred SDK init across six Rork-built apps and added a CI gate that fails the build when the budget is exceeded.
Running Crash-Free Rate as a Budget: An SLO Design Note for Deciding Where to Invest Across 6 Indie Apps
Notes from running 6 wallpaper apps in parallel and the shift from treating crash-free rate as a pass/fail threshold to treating it as an error budget. A working write-up on turning burn rate into investment and sunset decisions.
Managing Native Settings Across Rork-Exported Apps with a Custom Expo Config Plugin
Tired of re-typing your AdMob ID and ATT string every time prebuild wipes your Info.plist? Here is how I made native settings reproducible with a custom Expo config plugin and shared it across six wallpaper apps.
Fixing 'TurboModuleRegistry.getEnforcing could not be found' in Rork
A practical walkthrough of the 'TurboModuleRegistry.getEnforcing(...): could not be found' error that became common once the New Architecture went default. Covers Expo Go vs. dev builds, when a native rebuild is required, and how to isolate libraries that aren't New Architecture-ready.
Growing a Staged OTA Update System Without Breaking It
Shipping an EAS Update to every user at once is dangerous. From channel design to staged rollout to automatic rollback, here is the delivery architecture I settled on across 50M cumulative downloads, with working code.
Bringing ProMotion 120Hz to a Wallpaper App — Implementation Notes on CADisableMinimumFrameDurationOnPhone and Reanimated v3
Implementation notes from making a Rork-generated wallpaper app run at 120Hz on ProMotion devices. Covers Info.plist setup, Expo config plugins, Reanimated v3 worklets, FlashList scroll gotchas, and AdMob eCPM lift measured across six wallpaper apps.
Diagnosing 'Network request failed' That Only Hits Android Emulator in Rork
Your fetch returns fine in the iOS simulator but throws 'Network request failed' the moment you switch to Android. Here is the diagnosis order I use to separate localhost, cleartext, certificate, and proxy issues, with code that actually compiles.
Rork × EAS Update Runtime Version Strategy — Upgrading Expo SDK Across 6 Apps Without Breaking Existing Users
A complete record of how I migrated 6 Rork-generated apps from Expo SDK 50 to 51 in three weeks without a single user-visible incident — runtimeVersion policies, full eas.json, a safety-gated publish script, and a 30-minute incident recovery playbook.
Syncing 'Favorite Wallpapers' Across Devices with NSUbiquitousKeyValueStore in Rork iOS Apps — Implementation Notes from Six Apps Run in Parallel
For Rork-generated iOS apps, syncing a small set of favorites across devices is often better served by NSUbiquitousKeyValueStore than CloudKit. From the perspective of running six wallpaper apps in parallel, this article shares the threshold design, conflict resolution, and first-launch restore order learned in production.
Tracking Down BGTaskScheduler.submit Error Code=1 (Unavailable) in Rork iOS Apps
A field-tested checklist for diagnosing BGTaskScheduler.submit failing with Error Code=1 (Unavailable) in iOS apps built with Rork, walking through the six causes that account for nearly every case.
Three Weeks of Moving Six Wallpaper Apps from AsyncStorage to MMKV in Rork
Notes from three weeks of gradually moving six wallpaper apps from AsyncStorage to react-native-mmkv. Personal write-up from an indie developer who has been shipping iOS and Android apps since 2014.
Tuning Interstitial Ad Fatigue Across Six Rork iOS Wallpaper Apps with Crashlytics and Remote Config
An implementation note from running six Rork-built iOS wallpaper apps in parallel and rebalancing interstitial fatigue with a three-layer frequency cap powered by Crashlytics non-fatal signals and Remote Config thresholds. Swift code, Cloudflare Workers config, and measured eCPM / D1 retention numbers from a four-week phased rollout.