What we do

How we help

When an app has to be quick, secure and deeply tied to the device, native is the right call. We build with Swift and SwiftUI on iOS and Kotlin and Jetpack Compose on Android, and we know the hard parts: Screen Time, NFC, VoIP, Apple Pay, background location and offline maps.

o9Tech is a product engineering studio in Lahore, Pakistan, founded in 2022. We work with clients around the world.

SwiftUI and UIKit apps, including large migrations to SwiftUI
Kotlin and Jetpack Compose apps with clean, modular architecture
Banking-grade security: SSL pinning, keychain, encrypted storage
Hardware work: NFC, Bluetooth, thermal printers, Screen Time
App Store and Google Play releases, reviews and rejections handled

Client reviews

What clients say about this work

Probably my 10th time working with o9Tech to add features to my app and they are great to work with. Friendly, competent, patient and attentive

UI improvements and new features for an iOS and Android app
Sep 2026 · Upwork

very efficient, communication was great!

Vimeo streaming in a SwiftUI fitness app
Sep 2026 · Upwork

I've rehired o9Tech multiple times to add new features to my IOS and Android app; they are committed to doing high quality work, are accountable for their work and also responsive in a timely manner. I would continue to rehire them for future additional features and I plan on doing so soon. o9Tech recently did a complicated build for me that required a highly complex permission and paywall system rebuild for my app, one of the most technically demanding features in the project, involving intricate logic across free and premium user states, cancellation flows, and per user access management across both iOS and Android. They handled it thoroughly and delivered against a very detailed specification.

Paywall and permissions rebuild for an iOS and Android app
Jun 2026 · Upwork

See all reviews.

How we work

A clear plan, weekly builds, no surprises.

01
Discover
We learn your goals, users and constraints, then agree on scope, platforms and a realistic timeline. You get a written plan, not a guess.
02
Design & architect
We map the screens and the system behind them: data models, APIs and the stack that fits. Big decisions get made early and on paper.
03
Build in sprints
Working builds every week on TestFlight, Play internal testing or a staging URL. You see real progress and steer as we go.
04
Launch & scale
We handle store submission, monitoring and the first rounds of fixes, then stay on to grow the product with you.

FAQ

Native iOS & Android questions

Something else on your mind? Ask us directly.

When is native the right choice?

When the app leans on the device: NFC, Bluetooth, Screen Time, VoIP, Apple Pay, background location or heavy animation. Native also suits apps where speed and security matter most, like banking. For simpler apps, a cross-platform build can reach both stores faster.

Can you take over an existing iOS or Android app?

Yes. About 40% of our recent work is taking over codebases other teams started, then stabilizing and shipping them. We start with a code review and a written plan.

Do you handle App Store and Google Play releases?

Yes. We prepare the builds, store listings and review notes, and we deal with any rejections until the app is live.

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