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●DEADLINE — From August 31, 2026, Google Play requires target API level 36 (Android 16) or higher for both new apps and updates to existing ones. Thirteen days left●EXTENSION — If you cannot make the date, the deadline extension form in Play Console buys you until November 1. The extension is not automatic, so the request itself has to land before August 31●TARGET SDK — Even for Expo and React Native apps produced by builders like Rork, the targetSdkVersion is yours to verify. A template pinned to an older SDK will not meet the requirement on its own●POLICY — The spam and minimum functionality policy has been tightened around high-quality features and content experience, which puts thin, mass-produced apps squarely in scope●PRIVACY — You are expected to explain in detail what data is collected, how it is used, and whether it is shared, including analytics SDKs and advertising identifiers a builder wires in for you●RORK — Where the original Rork emits React Native and Expo, Rork Max generates SwiftUI. There is a free tier to start with, and paid plans begin at $25 per month●DEADLINE — From August 31, 2026, Google Play requires target API level 36 (Android 16) or higher for both new apps and updates to existing ones. Thirteen days left●EXTENSION — If you cannot make the date, the deadline extension form in Play Console buys you until November 1. The extension is not automatic, so the request itself has to land before August 31●TARGET SDK — Even for Expo and React Native apps produced by builders like Rork, the targetSdkVersion is yours to verify. A template pinned to an older SDK will not meet the requirement on its own●POLICY — The spam and minimum functionality policy has been tightened around high-quality features and content experience, which puts thin, mass-produced apps squarely in scope●PRIVACY — You are expected to explain in detail what data is collected, how it is used, and whether it is shared, including analytics SDKs and advertising identifiers a builder wires in for you●RORK — Where the original Rork emits React Native and Expo, Rork Max generates SwiftUI. There is a free tier to start with, and paid plans begin at $25 per month
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Hermes

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React Native6Expo4Rork4EAS Update1OTA1Sentry1Source Maps1Crash Reporting1Intl1Localization1Cold Start1Memory1
⬡ Rork Dev/2026-08-09Advanced

Measuring Hermes Bytecode Delta Updates: One Added Module Cost 29x More Than One Changed Line

I measured OTA delta sizes against a 2.4MB Hermes bytecode bundle. Changing one line cost 2,104 bytes; adding one module cost 61,197. The widely repeated advice about stable module IDs turned out to matter least.

⬡ Rork Dev/2026-06-28Advanced

When your Rork app's production crashes arrive minified — wiring Hermes source maps and debug IDs into Sentry

Rork-generated Expo apps run on Hermes, so production crashes often arrive as index.bundle:1:284913 with no function names. Here is how to wire Hermes source maps and debug IDs into Sentry so your stack traces become readable.

⬡ Rork Dev/2026-06-23Intermediate

Why Your Prices Show as “¥1234” on Some Phones — A Formatting Layer That Doesn't Trust Intl Alone in Expo

Same code, yet one device shows “¥1,480” and another “¥1480.” In Expo / Hermes, Intl leans on each device's locale data, so output can drift by OS and engine. Here is a resilient formatting layer that centralizes currency, number, date, and timezone handling and falls back gracefully where Intl is incomplete — with working code.

⬡ Rork Dev/2026-05-27Intermediate

Two Months of Rork × Hermes in Production — Cold Start and Memory in Real Numbers

What actually happens to cold start, memory, and crash rates after running Rork-generated apps with Hermes enabled in production for two months. Field notes from an indie developer with 50 million cumulative downloads.

⬡ Rork Dev/2026-05-24Advanced

Staged migration of a Rork-generated RN project to the New Architecture — notes from running six wallpaper apps in parallel

An implementation log for incrementally enabling Fabric and TurboModules on a Rork-generated React Native project, validated in parallel across six wallpaper apps. Covers flag design, compatibility triage, and KPI comparison based on actual production data.

⬡ Rork Dev/2026-04-30Intermediate

How to Track Down 'undefined is not an object' Errors in Rork — Fast

Read Hermes' 'undefined is not an object' error correctly in Rork — five typical causes with code, plus debugging steps when stack traces look unhelpful.

⬡ Rork Dev/2026-03-15Intermediate

Getting Started with Latest Performance Optimization Techniques in Expo SDK 55

Comprehensive guide to Expo SDK 55's Hermes V1, EAS build caching, and modal improvements. Learn the latest performance optimization techniques with implementation examples.