All Articles
Two Weeks After Adding Pangle and Mintegral to My AdMob Waterfall — Notes on eCPM and Fill Rate
A record from a wallpaper app with over 50 million downloads: I added Pangle and Mintegral to my AdMob mediation, then compared two weeks of eCPM and fill-rate data. What improved, what didn't, and where the setup tripped me up.
I Turned Off My AdMob Floors and Revenue Collapsed — The Mediation Rules That Actually Worked Solo
A record of tuning AdMob mediation eCPM floors to real-world rates on a 50-million-download wallpaper app, and handling the end of Unity Ads waterfall support. Why you must not turn INT floors off, the 80% match-rate boundary, and a twice-monthly review routine.
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.
Two Weeks of Maintenance After v2.1.0 — Running Crashlytics Triage Through Claude in Chrome
Notes from operating Beautiful 4K/HDR Wallpapers v2.1.0 and Ukiyo-e Wallpapers v1.8.0 through phased rollout. Defensive RecyclerView copies, Glide desugaring, drawable-nodpi placement, and what I now hand off to Claude in Chrome every morning.
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.
Three Weeks of Syncing Release Notes Across Six Wallpaper Apps
Notes from three weeks of writing What's New entries for six wallpaper apps in the same week, with the same tone, using Rork as the source of truth.
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.
Adding Slideshow and Page Jump to My Android Wallpaper Apps
Implementation notes from adding slideshow, a page-jump slider, and an ad-free option to the Android editions of Beautiful 4K/HDR Wallpapers and Ukiyo-e Wallpapers.
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.