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●GPT-6.1 SOL — Added to Rork's model menu (09-29) with Low, Medium and High effort; included on Pro and Max●SONNET 5.5 — Claude Sonnet 5.5 is selectable: strong at UI design and faster than Sonnet 5 (09-28)●SONNET 4.5 — Retires on the Claude API on 11/30, 27 days left. If your app calls it, check the migration target●SDK 58 — Moves to React Native 0.88. R8 is now on by default in Android release builds, and iOS prebuild generates a SceneDelegate●OBSERVE — EAS Observe now records native crashes too (SDK 57.0.21 or later, 10/07)●NEW — My App Open Ad Only Showed When the App…●GPT-6.1 SOL — Added to Rork's model menu (09-29) with Low, Medium and High effort; included on Pro and Max●SONNET 5.5 — Claude Sonnet 5.5 is selectable: strong at UI design and faster than Sonnet 5 (09-28)●SONNET 4.5 — Retires on the Claude API on 11/30, 27 days left. If your app calls it, check the migration target●SDK 58 — Moves to React Native 0.88. R8 is now on by default in Android release builds, and iOS prebuild generates a SceneDelegate●OBSERVE — EAS Observe now records native crashes too (SDK 57.0.21 or later, 10/07)●NEW — My App Open Ad Only Showed When the App…
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Advanced guides with production-ready code

Thank you for visiting Rork Lab. We publish advanced guides daily with copy-paste ready code, benchmarks, and production design patterns — practical content we hope you'll find useful as the next step after our free articles.

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PREMIUM ARTICLES

Premium Articles

499 exclusive articles
PREMIUM⬡ Dev Tools/2026-06-15Advanced

The Day a Third Reason to Hide Ads Appeared — Folding Rork App Ad-Free Logic Into One Place

Ads show only on one screen for paying users, or ads never show for free users. The usual cause is that the condition for hiding ads is scattered across the code. Here is how I fold three reasons — subscription, lifetime purchase, and a timed reward unlock — into a single state and route every ad through one hook, written as an implementation note from running six apps as an indie developer.

PREMIUM⟐ Business/2026-06-14Advanced

Don't Show Overseas Users a Hardcoded '$3.99' — Localizing Your Rork Max Paywall with StoreKit 2

Localizing the paywall in the native app Rork Max generates: never hardcoding price, letting StoreKit 2's displayPrice handle every currency and locale, computing the yearly 'savings' so it never breaks across currencies, and handling the production drift from regional pricing and exchange-rate changes.

PREMIUM⟐ Business/2026-06-14Intermediate

Review Count Is Decided by When You Ask, Not the Wording — Rating Design for Rork Apps

When a Rork-built app's review count stalls, the cause is usually not the request wording but the moment you choose to ask. Here is the expo-store-review frequency limit, how iOS and Android differ, and working implementation code.

PREMIUM⟐ Business/2026-06-14Advanced

Validating StoreKit 2 Subscriptions Server-Side: Granting Access Without Trusting the Device

To stop 'I paid but the feature won't unlock' and 'still usable after canceling,' you need a design that does not trust the device's verdict and settles entitlements on the server. Covers StoreKit 2 signed transactions, verification with the App Store Server API, and state sync via App Store Server Notifications V2, from real indie monetization.

PREMIUM◉ AI Models/2026-06-14Advanced

On-Device Image Tagging in Rork Max Swift Apps with Foundation Models Image Input

WWDC26 gave the on-device Foundation Models model image input. Here is how to add image tagging and captioning to a Rork Max Swift app entirely on-device, including the availability gate, structured output, and Vision interop.

PREMIUM⬡ Dev Tools/2026-06-14Advanced

Making Rork App API Calls Survive Failure — Timeouts, Exponential Backoff, and Circuit Breakers That Actually Hold

A hands-on implementation log for hardening the API layer of a Rork-generated app. Add timeouts, exponential backoff, and a circuit breaker step by step so your app keeps working even when a dependency goes wobbly.

PREMIUM⬡ Dev Tools/2026-06-14Advanced

Actually Delivering 'It Updates Without Opening' in Expo — A Realistic Background Task Design

Building 'content refreshes every morning' into a Rork-generated Expo app runs into iOS background execution being far less dutiful than you expect. Here is a minimal expo-background-task setup plus a design that doesn't break when the task never runs.

PREMIUM◇ App Dev/2026-06-14Advanced

Designing WidgetKit Timelines Around the Refresh Budget: Why My Wallpaper Widgets Stopped

Why does a home screen widget stop updating after the evening? A clear look at WidgetKit timeline design through three lenses: the refresh budget, the reload policy, and entry density. With a working TimelineProvider, an entry design that does not burn through the budget, and relevance-based prioritization, drawn from running six wallpaper apps solo.

PREMIUM⟐ Business/2026-06-14Advanced

Let People Try Before They Install — Shipping an App Clip from Your Rork Max Native App, Measurement Included

Adding an App Clip to the native Swift app Rork Max generates: letting people experience a slice from a QR or link without installing, then measuring the funnel through full download and first purchase — including the real 10MB cutdown and when an App Clip actually lowers conversion.

PREMIUM⟐ Business/2026-06-14Intermediate

Will Rork Max's $200 a Month Pay for Itself? Decide It With a Formula

When you are torn over Rork Max at $200 a month, here is a break-even formula, a script that runs a sensitivity analysis, and a way to judge the timing by three months of buildup rather than a single month—with notes from indie development.

PREMIUM◉ AI Models/2026-06-14Advanced

Calling Apple Foundation Models from a Rork (Expo) App: Bridging On-Device AI Through a Native Module

Rork generates Expo (React Native) apps, but Apple Foundation Models ships as a Swift framework you can't touch from JavaScript. Here's how to write an Expo Modules API bridge, gate it by availability, and fall back to the cloud on unsupported devices.

PREMIUM⬡ Dev Tools/2026-06-14Advanced

Building Rork Subscriptions Around RevenueCat Entitlements — Access Checks, Offering-Driven Paywalls, and Restore

Implementation notes for adding subscriptions to a Rork (Expo) app with RevenueCat. Make Entitlements the single source of truth for access, drive the paywall from Offerings so you can change prices remotely, wire up restore and the customer-info listener, and avoid the sandbox traps — all with working code.

PREMIUM⬡ Dev Tools/2026-06-14Advanced

Reading Steps and Sleep into Your Rork Max Native App — HealthKit for Calm, Number-Light Wellness Apps

A walkthrough of adding HealthKit to the native Swift app Rork Max generates: reading steps, sleep, and heart rate, writing mindful sessions, and handling background delivery — including the App Store review wording and the production-only 'permission granted but zero data' trap.

PREMIUM⬡ Dev Tools/2026-06-14Advanced

Updating Live Activities Remotely: Putting Live Lock Screen Info on a Rork App

A practical design for updating Live Activities remotely through APNs so the Lock Screen and Dynamic Island stay current even when your app is closed. Covers push-to-start vs update tokens, the content-state payload, stale-date and the update budget, and bridging from Expo, with working code and the issues I hit in production.

PREMIUM⬡ Dev Tools/2026-06-14Intermediate

When Your Rork App Gets ITMS-91053 — A Practical Guide to Privacy Manifests and Required Reason APIs

Submitting a Rork-generated Expo app to the App Store can trigger Privacy Manifest warnings even when you never wrote the offending code. Here is how to clear both Required Reason API and SDK manifest issues before you submit.

PREMIUM⟐ Business/2026-06-14Advanced

Win Back Lapsed Users with App Store In-App Events — Deep Link Implementation for Rork (Expo) Apps

An implementation memo on bringing lapsed users back to a Rork (Expo) app using App Store in-app events. Covers event card design, universal link routing, and measurement, from a solo developer's operational view.

PREMIUM◈ Getting Started/2026-06-13Intermediate

After WWDC26, Reselecting What an Indie Should Build Right Now

Now that on-device AI is free for small developers, the premises of app planning have quietly shifted. Here are five questions to choose what to build with Rork at the concept stage.

PREMIUM⟐ Business/2026-06-13Advanced

Getting to the Real Revenue Number — A Pipeline that Reconciles AdMob, App Store, Google Play, and Stripe

Dashboard revenue and the money that actually lands in your account do not match. Here is an aggregation pipeline that absorbs currency, timezone, and the gap between estimated and finalized figures across four revenue sources — with the implementation and operating judgment from running six apps.

PREMIUM◉ AI Models/2026-06-13Advanced

Routing inference on-device first and escaping to the cloud only when it's worth it, in a Rork app

Build a tiered, fallback-based inference router in a Rork (Expo) app: cache to on-device to Private Cloud Compute to a remote API (Claude/Gemini). Working TypeScript covering budgets, timeouts, caching, and image routing.

PREMIUM◈ Getting Started/2026-06-13Intermediate

Designing Empty States Properly in Your Rork App — First Run, After Deletion, and Network Errors in One Component

When you build an app from a prompt in Rork, only the data-filled screens tend to look polished. Here is how to build the first-run, post-deletion, and network-error empty states into one reusable component, with retry logic, screen-reader support, and effectiveness measurement.

PREMIUM⬡ Dev Tools/2026-06-13Advanced

Before Your Feature Flags Turn Into a Junkyard — Governing Naming, Staged Rollout, and Kill Switches Across Six Apps

Keep adding remote-config flags and within six months you have keys nobody remembers the meaning of. Here is a governance system — naming conventions, safe defaults, staged rollout, kill switches, and monthly cleanup — with the implementation from running six apps in parallel.

PREMIUM⬡ Dev Tools/2026-06-13Advanced

Choose Native Features by Retention Impact, Not by Checklist

Rork Max can generate widgets, Live Activities, and Core ML alike. But 'can build' and 'should build' are different things. Here is how to decide native-feature adoption by its effect on retention.

PREMIUM⬡ Dev Tools/2026-06-13Intermediate

You Only Get to Ask Once — Implementing a Notification Soft-Ask in Your Rork App to Lift Opt-In

On iOS, once a user denies the notification prompt you can never show it again. In a Rork (Expo) app, instead of firing the system prompt on launch, we add our own soft-ask screen and only request permission once the value has landed. Built with expo-notifications, covering Android 13 POST_NOTIFICATIONS, a recovery path after denial, and opt-in measurement.

PREMIUM⟐ Business/2026-06-13Intermediate

Design the Exit Before You Commit to a No-Code Mobile Platform

When you build an app business on a no-code tool, the first thing to plan is not the features but whether you can ever leave. Here is how to weigh lock-in risk for Rork and Rork Max from a portability standpoint.

PREMIUM◇ App Dev/2026-06-13Advanced

Shipping Wallpaper Packs Without an App Review — Versioning and Delta Delivery for Remote Assets Across Six Apps

Re-submitting your app every time you add ten wallpapers grinds operations to a halt. Here is a manifest-based versioning scheme with delta downloads, cache invalidation, and rollback — with the implementation and measured transfer savings from running six apps in parallel.

PREMIUM⟐ Business/2026-06-13Advanced

Raising Your Subscription Price: How to Handle Existing Subscribers on the App Store and Google Play

Raise your subscription price without losing existing subscribers: break-even churn math, store consent flows, PRICE_INCREASE and EXPIRED handling, and cohort tracking.

PREMIUM⬡ Dev Tools/2026-06-13Advanced

Keeping a Rork-Built Expo App Ready for Kotlin Migration — Design Notes After Android Studio's Migration Agent Announcement

Android Studio's new agent can migrate React Native apps to native Kotlin. Here is how I restructured a Rork-built Expo app to stay migration-ready: a native dependency audit script, a portable core layer pattern, and a readiness checklist.

PREMIUM◇ App Dev/2026-06-13Advanced

When and How to Remove Features Nobody Uses — Auditing and Safely Retiring Functionality in Rork-Built Apps

Unused features quietly make an app harder to maintain. A field-tested playbook from running six wallpaper apps in parallel — how to measure feature usage, decide what to retire, and remove functionality in three safe stages with Remote Config.

PREMIUM◉ AI Models/2026-06-12Advanced

A Three-Layer AI Cost Design for Rork Apps After Apple Opened Foundation Models to Small Developers

Apple now offers Foundation Models on Private Cloud Compute at no charge for developers under two million first downloads. Here is a three-layer cost architecture for Rork apps, with a simulation script and working bridge code.

PREMIUM⬡ Dev Tools/2026-06-12Advanced

Keeping Manual Fixes Alive Across Rork Regenerations — Boundary Design for AI-Owned Code

A tiny copy-change request quietly reverted my week-old ATT fix. Here is the boundary architecture I use now: a guarded directory, one-line adapters, patch assets, and scoped prompts — with measured blast-radius numbers.