--- title: "Designated Dev: we fix AI-built React Native and Expo apps" description: "We fix AI-built React Native and Expo apps that crash, fail EAS builds, break payments or get rejected by Apple or Google Play. Fixed price once scoped." url: "https://designateddev.com/" --- # We fix AI-built React Native and Expo apps: Built with AI. Stuck before _launch?_ We fix apps from Rork, Vibecode, Cursor and other AI builders that crash, won't build, or keep coming back rejected, then ship them to the App Store and Google Play. Fixed price once scoped, in writing. [Book a call](https://cal.com/designateddev/intro) [Or tell us what's broken](https://designateddev.com/#send) 30 minutes with the engineer who'd do the work. Bring the repo link or the rejection email. You keep your Apple ID; we never ask for a password. _Illustration: EAS build of the Redline app uploading to App Store Connect_ _Illustration: Redline app marked Ready for Distribution on both stores_ _Illustration: Redline workout app with a TestFlight crash notification_ built with - Rork - Vibecode - a0.dev - Cursor - Claude Code - and any AI-generated app 01 · the preview ## It worked in the preview. The builder showed you a finished app. A real iPhone, real users and App Review each found something else. _Illustration: Paywall showing a Restored! alert even though nothing was restored_ sound familiar? 1. Works in Expo Go. Crashes in TestFlight. 2. The paywall is empty, or buying unlocks nothing. 3. Rejected again. The email doesn't say why. 4. Sign in with Google loops back to the login screen. 5. The EAS build fails. Over and over. 6. Someone is running up your OpenAI bill. 7. Play Console wants 12 testers for 14 days. 8. The AI fixes one thing and breaks two more. Alert.alert("Restored!") The button never calls StoreKit. EXPO\_PUBLIC\_OPENAI\_KEY Shipped inside the bundle. TestFlight 1.0 (12) Crashes on first launch. 02 · the diagnosis ## Here's what's actually broken. The seven that show up most in AI-built apps. Only some of them are App Review's fault. 4 of 7 fixed _Illustration: Diagnosis screen: four of seven issues fixed, one in progress, two open_ 1. payments · 3.1.1Fixed ### The paywall unlocks nothing Products were never attached to the build, and restore never called StoreKit. 2. privacy · 5.1.1Fixed ### No account deletion, vague permissions In-app deletion that clears the backend, and a real reason for each permission. 3. auth · 4.8Fixed ### Google sign-in loops back to login The redirect scheme wasn't allow-listed. Sign in with Apple added too. 4. privacy · 5.1.2(i)Fixed ### AI feature sends data without asking A consent screen that names the provider before the first request. 5. securityFixing ### OpenAI key sitting in the bundle Anything in EXPO\_PUBLIC\_ ships to every phone. It moves behind a server. ↳ [282 of 444 AI chatbot apps on the App Store exposed paid LLM access · Wake Forest, 2026](https://arxiv.org/abs/2606.12212) 6. backendOpen ### Supabase tables open to anyone RLS was off. Policies per table, service key out of the client. ↳ [98% of Supabase backends from AI web builders had a security flaw · Symbiotic Security, 2026](https://www.symbioticsec.ai/blog/we-scanned-1-072-vibe-coded-apps-98-had-security-flaws) 7. stability · 2.1Open ### Fine in Expo Go, crashes in TestFlight Env vars never reached EAS. Release build tested on a real device. ↳ [Performance, which covers crashes, was Apple's top rejection category in 2025 · App Store Transparency Report](https://www.apple.com/legal/app-store/transparency/2025/) 03 · the fix ## We fix what's underneath. No rewrite for the sake of it. We repair the broken flows in the code you already have and leave notes on what changed. The screens barely change. _Illustration: EAS production build succeeded with every fix included_ - Data Supabase · RLS - Keys server proxy - Permissions app.json · Info.plist - Purchases StoreKit · RevenueCat - Screens React Native · Expo paywall/restore.ts3.1.1 ``` const info = await Purchases.restorePurchases();setIsPro(Boolean(info.entitlements.active.pro)); ``` app.json5.1.1 ``` "NSCameraUsageDescription": "Scan receipts to add expenses." ``` policies.sqlRLS ``` alter table notes enable row level security;create policy "own rows" on notes using (auth.uid() = user_id); ``` 04 · the process ## From broken build to live listing. One call, one written proposal, then the work. _Illustration: Written proposal for a Targeted Fix with scope, timeline and a fixed price_ 1. ### Book a call 30 minutes with the engineer who'd do the work. Bring the repo link or the rejection email. Broken 2. ### We diagnose the app Repo access, reproduce it on a real device, and a written report within 48 hours. Diagnosing 3. ### You get a written proposal A fixed price for the written scope. Anything new gets quoted before we touch it. Proposal sent 4. ### We fix, resubmit, and ship Tested on real devices and submitted from your accounts. You get the diff, the build and the notes. Live 05 · the result ## Watch it become a real app. _Illustration: Redline app home screen with a Ready for Distribution notification_ 1. Broken 2. Fixing 4 of 7 3. Build successful 4. In Review 5. Ready for Distribution Crashes gone, payments working, keys off the client, and a build that passes review. For rejections: every cited reason, plus one resubmission cycle. - Expo SDK upgrades - StoreKit restore purchases - React Native the app itself - RevenueCat entitlements - Supabase row-level security - EAS Build production build - App Store Connect role invite, no password 06 · the audit ## Start with the audit. Keep the report either way. Within 48 hours of repo access you get every problem we found, why it happens, the order to fix it in, and a fixed quote. The fee is credited in full to any fix within 30 days. If you take it elsewhere, the report is yours to hand them. Sample shown. Redline is a made-up app. Launch Readiness Audit · sample ### Redline 1.0 (12) Expo SDK 54 · Supabase · RevenueCat · built with Rork 62 readiness / 100 | severity | finding | cause | fix | | --- | --- | --- | --- | | Critical | OpenAI key readable inside the .ipa | EXPO_PUBLIC_OPENAI_KEY compiled into the client | Edge function, rotate key | | Critical | Any user can read every workout | RLS disabled on 4 of 6 Supabase tables | Per-user policies | | High | Restore Purchases does nothing | Shows an alert; never calls RevenueCat | restorePurchases + entitlement | | High | Crash on launch in release build | API_URL undefined in EAS environment | EAS env, release test | | Medium | Google sign-in loops | redline:// not in allowed redirect URLs | Register scheme | | Medium | No in-app account deletion | Required by 5.1.1(v) | Delete flow + backend | | Low | iPad screenshots stretched | Guideline 2.3 | Regenerate set | Verdict **Fix, don't rebuild.** Targeted Fix + one resubmission. p. 1 of 14 07 · pricing ## Starting estimates. Final numbers in writing. - ### Launch Readiness Audit Start here Within 48 hours of repo access: every problem, its cause, the order to fix it in, and a fixed quote. Credited in full to any fix within 30 days. from $399 - ### Targeted Fix One named problem One named problem fixed and shipped: a crash, a dead paywall, a sign-in loop, a failing build, or a rejection plus one resubmission. Price follows how many flows are broken, not hours. from $1,200 - ### Ship-to-Store Sprint About 10 days Everything between “works in the preview” and live in both stores: purchases and RevenueCat, keys and backend locked down, production builds, Play closed testing, and submission. from $2,500 - ### Keep-Alive Monthly, after launch Expo SDK upgrades, hotfixes, dependency and security patches, and store policy changes after launch. from $400/mo Prices are starting points, not fixed rates. Every app is different — final pricing is set in your proposal after a call. [Or tell us what's broken](https://designateddev.com/#send)[Book a call](https://cal.com/designateddev/intro) 08 · access ## Your accounts stay yours. - We never ask for your Apple ID password or a two-factor code. - App Store Connect and Play Console by role invite. EAS by scoped token. Supabase by project role. - Secrets never travel through chat or email. - At handoff we revoke our access and give you an inventory of every account, key and signing certificate. - All work lives in your repo. The code is yours. NDA on request. ## What we won't do. - Rebuild your app in a new framework, unless the audit shows fixing costs more. - Add features in the middle of a fix. New scope gets quoted before we touch it. - Promise App Store approval. Apple decides; we answer every reason they cite. - Pretend we have case studies. We're new, so every audit is done by the engineer who does the fix. 09 · questions ## Before you book. ### What problems in AI-built apps does Designated Dev fix? Designated Dev fixes React Native and Expo apps built with AI tools like Rork, Vibecode, a0.dev, Cursor and Claude Code when they crash, won't build on EAS, have a paywall that unlocks nothing, loop on sign-in, ship API keys in the bundle, leave the database open, or keep getting rejected by the App Store or Google Play. If it worked in the builder and not in the real world, it counts. ### Can you fix an AI-generated React Native app without rebuilding it? Yes. Most AI-built React Native and Expo apps don't need a rewrite. Designated Dev reproduces each problem on a real device, finds the underlying cause and repairs the broken flows in the code you already have. We recommend a rebuild only when the audit shows fixing would cost more than replacing, and the report says which. ### How much does it cost to fix an AI-built app? Designated Dev's Launch Readiness Audit starts at $399 and is credited in full to any fix within 30 days. A Targeted Fix for one named problem starts at $1,200, a Ship-to-Store Sprint at $2,500, and Keep-Alive maintenance at $400 a month. Final prices are set in a written proposal after a call. ### Can I keep using Rork or Cursor after you fix my app? Yes. Designated Dev works in your existing repo and leaves notes on what changed and why, so you can keep prompting Rork, Cursor or any other AI builder afterwards without the next prompt quietly undoing the fix. ### Do you need my Apple ID password to submit my app? No. Designated Dev never asks for an Apple ID password or a two-factor code. You invite us to App Store Connect and Play Console with a role, EAS with a scoped token and Supabase with a project role, and we revoke that access when the work is done. ### Can you guarantee my app will be approved by Apple? No. Apple decides every App Review outcome, so no one can honestly guarantee approval. Designated Dev resolves every reason Apple cites, includes one resubmission cycle, and checks the rest of the app so the next review has less to find. ### Do you publish apps to Google Play as well as the App Store? Yes. Designated Dev handles Google Play too: the 12-tester, 14-day closed test required for new personal developer accounts, the target API level, the Data safety form, and the submission itself. ### Do you fix bare React Native apps, or only Expo? Both. Designated Dev works on Expo and bare React Native apps. If your app is built on another stack, send the details and we'll tell you on the call whether we're the right fit. Ready when you are ## Tell us what's broken. We'll tell you what it takes. 30 minutes with the engineer who'd do the work. No slides, no pitch. If it isn't worth saving, we'll say so. [Book a call](https://cal.com/designateddev/intro) [Or tell us what's broken](https://designateddev.com/#send) We reply within one business day. _Illustration: Redline marked Ready for Distribution on the App Store and Google Play_ [Designated Dev](https://designateddev.com/#top) [What breaks](https://designateddev.com/#found)[Process](https://designateddev.com/#process)[Pricing](https://designateddev.com/#pricing)[FAQ](https://designateddev.com/#faq)[Privacy](/privacy/) [hello@designateddev.com](mailto:hello@designateddev.com)Updated Sep 26, 2026Live on both stores