Android apps

Your Android app, built to ship.

Native Android apps built with Kotlin and Jetpack Compose — reliable across thousands of devices and screen sizes. Free working prototype in 1 day, then a production release at a fixed price and date.

KotlinJetpack ComposeRoom

Get your free prototype 30-min call · no commitment

9:41

Arriving in

12 min

DKDmytro K.★ 4.9 · Courier✆

✓Order picked up12:04

✓On the way12:11

Delivered~12:23

Contact courier

TrackingScreen.ktAI

@Composable

fun TrackingScreen(order: Order) {

val eta by order.eta.collectAsState()

Column {

LiveMap(route = order.route)

EtaCard(minutes = eta)

CourierRow(order.courier)

}

Senior review · approved

Pipelinemain

BuildKotlin
Testspassed
Senior review
Internal testing
Google Playrollout

Buildto launch

Day 1Week 1Week 2Week 3Live

Courier 1.0 is liveRolling out on Google Playnow

At a glance

One product. One price, one date.

The essentials, before you book a call.

UDEX builds Android apps for founders and product teams. Native Android apps built with Kotlin and Jetpack Compose — reliable across thousands of devices and screen sizes. AI writes the code, tests and CI/CD, while senior engineers own the architecture and review every change.

1 dayFree prototypeNo payment, no commitment

FixedPrice and dateAgreed before we start

100%YoursCode, repository and accounts

Platform: Android phones and tablets, native
Ships to: Google Play
Stack: KotlinJetpack ComposeRoomFirebaseGoogle Play
Quality: Senior review on every change, automated tests, CI/CD

How it works

Idea to production. In three steps.

AI does the heavy lifting. Senior engineers make every decision that matters.

01Day 0
Share the idea
A 30-minute call. We agree on the core flow, the scope and a fixed release date.
02Day 1 → release
AI builds, senior engineers decide
AI writes the code, tests and CI/CD. Senior engineers set the architecture and review every change. Your prototype is ready on day 1.
03Release day
Ship to Google Play
The release goes live, and the code, repository and accounts are handed to you.

Who it’s for

Built for founders and product teams.

Here is where it works best, and where it doesn’t.

Founders in Android-first markets

Reach the majority of users in Europe, LATAM, Asia and Africa.

Operations and field teams

Apps for couriers, technicians and warehouses on company devices.

Hardware-connected products

Bluetooth, NFC, scanners and background work done natively.

Consumer apps

Delivery, booking and fintech apps that must feel fast on every device.

Companion apps

An Android version of a successful iPhone or web product.

Teams replacing old apps

Rebuild a legacy Java app in modern Kotlin and Compose.

Not the right fit

iPhone at the same launch: see React Native or Flutter for both platforms.
Games, 3D and AR-heavy experiences.
Certified compliance from day one, such as HIPAA or PCI audits.
Open-ended hourly work without a defined first release.

How we work

Six stages, one team.

All services

Pricing

Start free. Ship at a fixed price.

Two steps. The prototype costs nothing, and the release costs exactly what we agree.

Prototype

Free1 day

A working prototype of your core flow to test with users and show investors.

Key screens and the main user flow
Working on real devices and browsers
No payment, no commitment

Get the free prototype

Release

Fixed priceand date, agreed upfront

A production release, shipped to Google Play, that you fully own.

Kotlin, Jetpack Compose, Room and the features agreed on the call
Automated tests, CI/CD and senior code review
Release to Google Play and 100% code ownership

Start with a call

Fixed means fixed. No hourly billing and no surprise invoices: anything new is priced before it is built.

Book a call

Thirty minutes. Then your prototype.

Walk us through the idea, and we will scope the core flow and build your free prototype the next day.

Book a 30-min call

FAQ

Questions, answered.

Straight answers about cost, timing, quality and ownership.

How much does it cost to build an Android app?

The price is fixed for the agreed scope and set before work starts. You first get a free working prototype of the core flow in 1 day, then a fixed price and release date for the production version.

How long does it take to build an Android app?

A working prototype takes 1 day. The production release date is agreed upfront and depends on the scope; AI speed with senior engineering makes it much faster than classic development.

Do you publish the app to Google Play?

Yes. We prepare the build, listing and screenshots, set up staged rollouts and submit the release under your developer account.

Will it work on cheap and old Android devices?

Yes. We set a minimum Android version together and test on a range of popular devices and screen sizes before release.

Can the app work offline?

Yes. We build offline-first storage with background sync when it is part of the scope.

Is the prototype really free?

Yes, with no commitment. After a 30-minute call we build a working prototype of your core flow in 1 day, and then you decide whether to continue to the release.

Will the price go up during the build?

No. The price is fixed for the agreed scope. Anything new you want to add mid-build is priced separately and built only after you approve it.

Who owns the code?

You do, 100%. The source code, repository and accounts are yours, and the release ships to Google Play under your name.

Is AI-written code safe to ship to production?

It ships only after senior review. Senior engineers own the architecture, security and code quality, and automated tests run on every change.

In practice