Mobile-only engineering studio

We build iOS & Android apps people actually use.

Cortex Overdrive builds mobile — full stop. Our own senior engineers design, build, and QA every iOS and Android release in-house. Need a website, backend, or AI automation too? We bring in trusted partners and manage the whole thing for you.

Start a project → See our work

7+ Years shipping mobile apps
iOS + AND Built entirely in-house
EU Based in Bratislava

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Overview

What we do

iOS & Android, built in-house. Everything else, through partners.

We're a mobile-only engineering team — every iOS and Android release is designed, built, and QA'd by our own senior engineers. When your product needs a website, backend, or AI automation, we bring in vetted partners and manage them for you.

Our specialty Core

iOS Development

Native Swift & SwiftUI apps built in-house by senior engineers — from first prototype to App Store launch and long-term maintenance. This is what we do best.

Swift / SwiftUI
App Store release
Universal links & deep linking

Our specialty Core

Android Development

Native Kotlin apps built by the same in-house team, to the same standard as our iOS work — one product vision, delivered natively on both platforms.

Kotlin / Jetpack Compose
Play Store release
Platform parity with iOS

Quality

QA & Testing

Every release is tested in-house across real devices and OS versions before it ships — manual exploratory testing plus automated regression, so bugs don't reach your users.

Device & OS matrix testing
Automated regression suites
Release sign-off

Partner

Web, Backend & AI

Need a marketing site, a dashboard, an API, or AI-powered automation? We bring in a trusted partner team and manage delivery end to end, so you still have one point of contact.

Web front & back end
APIs & cloud deployment
AI-powered automation

Who's building your app

One senior team, every mobile role covered.

No hand-offs to juniors and no revolving contractors — the same small, senior team owns your product from the first line of code to release day.

Andrii Vysher

iOS Developer · CEO

Owns the Swift/SwiftUI codebase end to end — architecture, UI, and App Store release.

Gleb Kravchenko

Android Developer

Brings the same product to Android in Kotlin, matching design and behavior on every device.

Vlad Levin

QA Engineer

Tests every build across real devices and OS versions, and signs off before anything ships.

How we work

Specialist-led delivery, without the agency overhead.

You work directly with the people building your product. We keep teams small, senior, and accountable — and bring in trusted partners only where it adds real value.

Senior engineers on every project — no hand-offs to juniors
iOS, Android, and QA built in-house — web, backend, and AI through vetted partners
Clear, honest communication and fixed-scope milestones
EU-based, GDPR-aware, and easy to reach

01

Discover

We start with your goal, not a feature list. A short, focused conversation to scope the real problem and define what success looks like.
02

Design & build

Senior-led delivery in tight iterations. You see working software early and often — no black box, no surprises at the end.
03

Ship & grow

App Store / Play Store release, monitoring, and a roadmap. We stay on as a long-term partner, not a one-off vendor.