Native-feel mobile apps from one cross-platform codebase.

iOS and Android, written once in React Native or Flutter, deployed to both stores. We ship in weeks at a fraction of native cost — without the hybrid sluggishness.

Live · iOS + Android · synced
1 codebase · 2 storesRN · Flutter · v1.0 build
4 wkspilot to launch
1codebase, two stores
$0platform lock-in fees
The problem

Why mobile apps cost more than they should.

Hybrid apps feel sluggish — the touch lags, animations stutter, users uninstall. Native apps cost twice as much because you’re building it twice. Then there’s the third option: an agency that promises React Native or Flutter and ships something that performs like Ionic from 2017. Done right, React Native and Flutter both render to native components and feel native — from one codebase, in weeks, at a fraction of native cost. We do it right.

App-store telemetry · sample3 anti-patterns
01 · Fail·HYBRID_LAG
WARN

Hybrid apps (Cordova, Ionic) run at 20–30 fps where users expect 60. Touch lag, stutter, uninstalls.

avg frame rate:23 fps·Ionic v6 audit
02 · Fail·NATIVE_DUPLICATE_COST
CRIT

Separate Swift and Kotlin builds double the engineering cost and the bug surface area.

cost · timeline:2× · 6mo·enterprise quote
03 · Fail·STORE_REJECTION
CRIT

Generic cross-platform builds get rejected for performance, privacy, or store policy.

rejection rate:34%·cheap RN agency
What we ship

Four shapes, one engineering team.

01

Mobile MVPs

Idea to TestFlight in 4 weeks. Production on both stores in 6–8.

02

Existing app rebuilds

Move from Cordova, Ionic, or Flutter to React Native without breaking what works.

03

App-store-ready launches

Reviewer-ready bundles, App Store + Play Store policies handled, store listings written.

See case study
04

Backend-included apps

App + API + auth + database. Whole stack from one team.

Why Zaibex

Side-by-side with a typical agency.

We don’t outbid the cheap shops, and we don’t pretend to be McKinsey. Here’s where the real practical difference lives.

Typical agency
Zaibex
Hybrid app (Cordova, Ionic), sluggish feel
React Native or Flutter, native feel
Native iOS + Android = 2× the work
One codebase, two platforms
$50K minimum, 6-month timeline
$5K–$30K, 4–8 weeks
Junior dev assigned post-kickoff
Senior engineer owns end-to-end
Built on the agency’s platform
Code you own from day one
Hands off after launch
On-call for app store rejections + updates
The stack

The exact tools and why we chose them.

No mystery stack, no platform lock-in. You see what we use, you read why, and you own the keys on day one.

01 · Framework
React Native · Flutter

We pick the right one — RN for JS/TS teams, Flutter for design-heavy or pixel-perfect specs.

02 · Backend
Next.js · tRPC

Type-safe API the mobile app shares with web. One stack for both clients.

03 · Database
Postgres · Drizzle

Real database, real schema, real performance.

04 · Auth
Clerk · Auth.js

Mobile + web SSO with social and email out of the box.

05 · Push & sync
Firebase · Expo · OneSignal

Push, OTA updates, analytics — Firebase across both stacks, Expo when we ship RN.

06 · Payments
Stripe · RevenueCat

In-app purchases done right, including App Store and Play tax handling.

The process

Discover · Architect · Build · Ship.

Four stages, named timelines, named deliverables. No open-ended discovery. No moving goalposts.

01·3 days

Discover

We map the user flows, the platform-specific requirements, and what TestFlight day looks like.

  • User flow map
  • Platform requirements
  • App store strategy
02·3 days

Architect

Architecture, navigation model, native module needs, push and offline strategy.

  • Architecture diagram
  • Native dependencies list
  • Sync + offline plan
03·3–6 weeks

Build

Builds on TestFlight and internal Play Store from week 1. Iterate against real device feedback.

  • App on TestFlight
  • Both-store builds
  • QA on real devices
04·1 day

Ship

Store submission with reviewer notes. We handle rejections if they come.

  • App Store + Play Store launch
  • Marketing assets
  • 30-day hyper-care
In production

Real numbers, named client.

+50%DAU growth after mobile launch
YesChef — Streaming platform
Read the full case study
The problem

A streaming product needed mobile apps that matched the web experience without doubling the engineering cost or timeline.

Our approach

We built React Native apps for iOS and Android with shared backend, real-time sync, and the streaming features users actually used.

The outcome

50% DAU growth after mobile launch. Both stores live within the quarter, in production today.

Pricing & timeline

Fixed price. Fixed scope. Public ranges.

We don’t hide pricing behind a sales call. Pick the tier that matches your stage. The discovery call confirms scope, not budget.

Pilot
$5K
4 weeks
  • Mobile MVP on one platform (iOS or Android)
  • Working backend + auth
  • TestFlight or internal Play Store builds
  • Source code ownership
  • 3 months of post-launch support
Custom
Let's talk
Tailored to scope
  • Both stores, full feature set
  • Backend + database + push + payments
  • Senior engineer-led engagement
  • Store submissions handled
Honest answers

The questions we actually hear on calls.

React Native, Flutter, or native iOS/Android?

Depends on your project. React Native if you have JS/TS engineers and want to share code with web. Flutter if you need pixel-perfect design control or have Dart expertise on the team. Native (Swift/Kotlin) only when an app needs deep platform APIs that neither cross-platform stack wraps — AR, advanced graphics, specific Bluetooth profiles. We pick during Discover and tell you upfront which fits.

How long to ship to both stores?

Pilot ships to one store in 4 weeks. Both stores in 6–8 weeks. We handle reviewer rejections.

Will you handle App Store and Play Store policies?

Yes. We’ve shipped apps through 50+ store reviews. We know what they reject and write the reviewer notes for you.

Can you do native iOS or Android if needed?

Yes. We have Swift and Kotlin in our stack when an app truly needs it. We’ll tell you upfront if your app does — usually it doesn’t.

What about ongoing updates?

Monthly retainer covers OS updates, library updates, app store policy changes, and feature additions. Or take the code and run it yourself.

Do you build the backend too?

Yes, usually with Next.js + tRPC + Postgres. The mobile app (RN or Flutter) and web client share the same type-safe API. One team, both ends.

Ready when you are

Mobile is where most agencies overcharge and under-ship. We do the opposite — one codebase in React Native or Flutter, one senior engineer, both stores, in weeks. The app you’ve been quoted six figures for? We can probably do it for a quarter, in a third of the time.