For mobile app owners, not end users
Your React Native app is crashing or won't build. Here is how we fix it.
Time is money. If you own a React Native app that is crashing in production, refusing to build cleanly, or hitting walls every time you try to upgrade, this page is for you. We audit first, name the root cause, then fix on a flat fee. Senior React Native hands. Founder-operator scale, not enterprise-only.
Audit-first · Flat-fee · Senior-led · 30-day stability window
Rescue outcome
Crashes cut from 1,000 to 50 per release
We took over a failing React Native healthcare app weeks before its anchor client would have walked. The top-volume crashes on Android and iOS were reduced from 500-1,000 to 50-100 per release through diagnostic-driven fixes. Cold start cut from 3 seconds to under 0.5. Biweekly crash triage still running on the team that took over.
Read the full case →If any of these sound familiar, we have rescued an app like yours before
These are the situations we see most often when React Native apps come in for rescue.
Project won't build cleanly on every team member's machine
iOS Pods install fails on M-series Macs. Android Gradle build fails on the new CI runner. The lockfile drifted. Node versions disagree. Half the team's local environments produce different artifacts. Every onboarding takes a day to get to a green build.
Library or SDK upgrade attempts keep breaking the app
Every attempt to upgrade React Native, a major library, or a third-party SDK leaves the app in a worse state. Hermes incompatibilities, library peer-dependency conflicts, deprecated APIs that have no clean replacement. Your team rolls back every time.
New Architecture (Fabric, TurboModules) crashes or won't enable
You tried to enable the New Architecture and the app crashed on startup. Or it works on a fresh sample but not on your codebase. Native module compatibility is the most common culprit, but bridging code from old patterns is a close second.
Layout regressions, list performance, or scroll lag on production users
Lists with hundreds of items lag. FlatList vs FlashList tradeoffs that worked in dev don't survive real data volume. Specific Android devices show different layout from iOS. The performance gap between debug and release builds is suspicious.
Specific OS or device combinations crash but you cannot reproduce
Crashlytics or Sentry shows a crash cluster on Samsung S22 running Android 14, or iPhone SE 1st gen on iOS 17.0.3. Your team cannot reproduce locally. The crash report stack trace points at native code you do not write. The root cause is unclear.
SDK version requirements, Hermes, or Expo SDK pressure
App Store SDK requirements bump every year. Hermes adoption is no longer optional. Expo SDK upgrades break older third-party libraries. You are pinned to versions that are increasingly unsupported.
How a React Native rescue actually runs
Four stages. Clear, concrete steps. Every step has a deliverable you can point to.
Paid Technical Audit
Mandatory first step. Read-only repo access. Standalone product. You walk away with a written report whether or not you move forward.
We read the codebase, the build configuration, the crash reports, the package.json + lockfile, the native iOS and Android projects, and the CI pipeline. We test on real devices. The audit produces a severity-ranked findings list, a build-environment diagnosis, a crash root-cause analysis, and a rescue plan. Five working days, fixed-fee.
Fix plan
We turn the audit's findings into a flat-fee rescue scope. You see the exact fix list and the dollar number before any rescue work starts.
Some fixes are surface-level: lockfile reconciliation, library pin tightening, build-environment cleanup, specific crash fixes. Some are architectural: New Architecture migration, Hermes adoption, deep dependency cleanup. The audit tells you which case you are in. If a rebuild is honest, we say so and re-scope as a Build.
Executed fixes
Hands-on takeover. Read/write repo access, daily builds, weekly sync. We ship in the order the audit prioritized.
Stop the bleeding first: highest-volume crashes, build pipeline blockers, the regressions hurting your most-used screens. Then library and SDK alignment, then performance work, then optional New Architecture or Hermes adoption if the audit recommended it. Daily builds to your team. We do not add feature work during stabilization.
Handoff and stability window
Handoff docs to your team, plus a 30-day stability window. Then you pick your next path.
Your team takes the wheel with the handoff package: runbooks for the release pipeline (Fastlane, EAS, or hand-rolled CI), crash-triage process, RN-version upgrade playbook, and the architectural decision records explaining every non-obvious choice in the fixes. A 30-day stability window follows handoff.
Outcomes from a recent rescue
Per-engagement numbers from a React Native healthcare therapy app rescue.
1,000 → 50
Crashes per release on top offenders
3s → <0.5s
Cold-start load time
0.7★ → 4.4★
App Store rating turnaround
How much does a React Native rescue cost?
Audit-first, quoted fast. Flat-fee rescue scope from the audit's findings. No estimates, no stretched engagements.
React Native App Rescue
Starting at $8,000 · audit first, then quoted
Audit-first ($2,500 Quick Scan or $5,000 Full Audit). Flat-fee rescue scoped from the audit's findings. Deposit + milestones. 30-day stability window after handoff.
Scope is locked after the audit. If the findings show the right answer is an architectural rebuild or RN-version cutover, we re-scope as a Build, not a stretched rescue.