The upgrade that breaks everything
A new iOS, a higher target SDK, a dropped Expo version. What built yesterday doesn't build today.
Hi, I'm David.Senior React Native engineerYour React Native app, maintained and shipping.
One senior engineer who owns your app, for a flat monthly fee. Upgrades, store deadlines and production incidents handled, with a 4-hour response in US business hours.
7-day money-back · Cancel anytime · No long contracts
Apps I've shipped
100K+ downloads, rated 4.8 from 26K+ reviews
A gamified daily devotional: read, pray and reflect each day to keep your lamb avatar alive. Streaks, XP and offline reading.
My own app, live on the App Store
A flashcard app with custom decks, daily goals, reminders and a timed quick mode, in a clean interface with dark mode.
Built for SENAI Alagoas
A free platform for companies to record production indicators and compare them across their sector in real time, part of a state digital transformation program.
An instructor app for a driving school
Instructors register students, schedule personalized lessons and follow each student's progress in real time.
100K+ downloads, rated 4.8 from 26K+ reviews
A gamified daily devotional: read, pray and reflect each day to keep your lamb avatar alive. Streaks, XP and offline reading.
My own app, live on the App Store
A flashcard app with custom decks, daily goals, reminders and a timed quick mode, in a clean interface with dark mode.
Built for SENAI Alagoas
A free platform for companies to record production indicators and compare them across their sector in real time, part of a state digital transformation program.
An instructor app for a driving school
Instructors register students, schedule personalized lessons and follow each student's progress in real time.
100K+ downloads, rated 4.8 from 26K+ reviews
A gamified daily devotional: read, pray and reflect each day to keep your lamb avatar alive. Streaks, XP and offline reading.
The problem
Once your app is live, everything is a deadline.
Mobile apps don't stay finished. The platforms move every year, and an app nobody maintains slowly stops shipping.
Rejected by the store
A rejection or policy deadline lands the week you planned to launch.
Friday, 10pm, crashes climbing
A release goes out, crashes spike, and nobody on your team owns mobile.
The dev who built it left
The app works, but nobody knows why. Every change feels risky.
Store deadlines already in effect
Fall behind and you can't ship even a one-line fix.
Google Play · since Aug 31, 2026
Updates must target Android 16 (API 36)
Apps still targeting older versions can't publish updates, and older targets lose visibility to new users.
Official sourceApp Store · since Apr 28, 2026
Builds must use Xcode 26 and the iOS 26 SDK
If your project doesn't build on Xcode 26, App Store Connect rejects the upload, including bug fixes.
Official source
Who it's for
Built for apps that already make money.
A good fit if
- Your app is live, with real users and revenue
- An agency or a developer built it, and they've moved on
- Nobody on your team owns mobile full time
- You'd rather pay a flat fee than recruit and manage a hire
Not a fit if
- You're building a brand-new app from scratch
- You're looking for the cheapest developer per task
- Your app isn't built with React Native or Expo
How it works
Like having a mobile engineer on call.
- 1
Week one: onboarding
Add me to your repo, Expo / EAS and store accounts with the permissions you choose. Within a week I audit the codebase, set up crash monitoring and map every store and SDK deadline that affects your app.
- 2
Send requests
Add anything to your board: an upgrade, a crash, a rejected build, a new screen. I work through it one request at a time, in your order.
- 3
I ship it
Most requests are delivered in 48–72 hours on average. Bigger ones are split into smaller pieces so you see progress every few days.
Queued
- Add Sign in with Apple to onboardingFeature
In progress
- Upgrade Expo SDK and React NativeUpgrade
Shipped
- Fix Android edge-to-edge layoutBug
- Resubmit build after App Store rejectionRelease
Why it costs more than a task service
You're not buying tasks. You're buying someone accountable.
Task services wait for you to file a ticket. I own the app: I watch it, plan around the stores and answer when it breaks. Every plan includes the basics below, plus the promises I put in writing.
- iOS, Android & Expo SDK upgrades
- Crash and bug fixes
- Store releases and rejections
- Crash monitoring
- One request at a time, 48–72h average
One engineer who owns your app
Not a rotating team. The same senior engineer on every request, building context on your codebase month after month.
4-hour incident response
Production incidents get a response within 4 business hours, 9am–6pm US Eastern, Monday to Friday.
Deadlines handled before they hit
I track every App Store, Google Play and Expo requirement that affects your app and schedule the work ahead of time.
Store deadline guarantee
If a store rule I should have handled blocks your updates, your next month is free.
A monthly health report
Crash-free sessions, outdated dependencies and upcoming deadlines, every month, even when nothing broke.
At most 4 apps at a time
I keep my client list small on purpose. When it's full, new clients join the waitlist.
About
Hi, I'm David. EasyCall is just me.
I'm a senior React Native engineer. I've built and released apps to the App Store and Google Play myself, including the 4 shown above, so I know the parts that break after launch: upgrades, store reviews and the bugs that only show up in production.
No account managers, no hand-offs. The person you talk to on the call is the person who opens the pull request.
- Based in Brazil
- UTC-3 (Brazil), overlapping US Eastern hours
- React Native
- Expo
- TypeScript
- iOS & Android releases
- Sentry
- EAS / Fastlane
“David consistently impresses with his kindness, deep technical expertise, and his ability to translate complex ideas into high-performing mobile solutions. His work is greatly contributing to enhance our mobile platform and improving user experience.”
“David is a really skilled guy when it comes to mobile app development. He's got amazing technical abilities and always delivers high-quality work, plus he's super focused and proactive.”
Free
App health audit
Give me read access to your repo and I'll send you a short written report on where your app is at risk. Yours to keep, whether or not we work together.
Book a free audit- Outdated dependencies and upgrade blockers
- Store policy and target SDK deadlines
- Crash hotspots and risky code paths
- What I would fix first, in order
Pricing
One flat monthly fee. No surprises.
No hourly billing, no proposals, no long contracts. Pick a plan and send your first request.
2 founding spots left, price locked in
Maintenance
Keep the app you have healthy, current and in the stores.
$2,500/month
- iOS, Android & Expo SDK upgrades, ahead of store deadlines
- Crash and bug fixes
- App Store & Google Play releases and rejections
- Crash monitoring and a monthly health report
- Production incidents answered within 4 business hours
- One request at a time, 48–72h average
Growth
Most completeEverything in Maintenance, plus new features from your roadmap.
$5,000/month
- Everything in Maintenance
- Feature work from your roadmap
- Each feature scoped to deliverables of up to 1 week
- Bigger features split into weekly pieces you can review
- One request at a time, production issues always first
7-day money-back guarantee · Cancel anytime · At most 4 apps at a time · Prices in USD
FAQ
Questions, answered.
Stop dreading the next iOS update.
Book a 30-minute call. We'll look at your app together and you'll know if this is a fit.