Apps that ship, sell and stay on the store.
A senior team that takes a mobile product end to end — product thinking, design, native and cross-platform code, App Store review, subscriptions and growth. We build for clients and we publish our own apps, and you always talk to the people who write the code.
Everything between an idea and a paying user.
Take the full cycle, or plug us into the part of the product that is stuck.
iOS Development
Native apps in Swift and SwiftUI, or React Native when speed matters more than platform depth. Built against the current SDK, not the one from three years ago.
Android & Cross-platform
One codebase where it makes sense, two where it pays off. Kotlin, React Native and Flutter — chosen for your budget and roadmap, not for our habits.
Product & UI/UX Design
Screens, flows, onboarding and paywall designed as one funnel. We prototype in Figma and test the first version before a single view is built.
ASO & Growth
Store listing, keywords, screenshots, localisation and review strategy. Getting approved is step one; getting found is the part that decides the revenue.
Monetisation & Subscriptions
Pricing, trials, paywalls and the analytics behind them. RevenueCat and StoreKit set up properly, so you read real numbers instead of guessing.
Release & Support
CI/CD, signing, submissions, rejection handling and version upkeep. We know the guidelines that get apps pulled — and how to answer App Review when they do.
Client work, and our own apps beside it.
Most of what we build belongs to our clients and stays under NDA. What we can show you is the portfolio we publish ourselves — same team, same standards, and every recommendation we make has already cost us our own money first.
Unspace
A private social space where you decide who sees what — your space, your rules.
App Store
DictAI
A speaking coach in your pocket: record, get feedback, and sound like you meant it.
App Store
ResetBet
A quit-gambling companion — streaks, urges and recovery, built without dark patterns.
App Store
PDF Scanner
Scan, read, edit and convert documents — an office scanner that fits in a pocket.
App Store
Invoice & Receipt Maker
Invoices, estimates and receipts for people who bill from their phone between two jobs.
App Store
eSign
Fill forms and sign PDFs with a real signature, without printing a single page.
App Store
Sober Snob
A guide to non-alcoholic beer — find what is actually worth drinking, and keep track of it.
App StoreFive steps, no surprises.
Fixed scope per stage, a build you can touch at the end of each one, and a written estimate before we start.
Brief
We map the idea, the audience and the money model, then give you a scope and a number in writing.
Design
Flows, screens and a clickable prototype in Figma. You approve what the app looks like before it exists.
Build
Two-week sprints with a build in your hands at the end of each one. Progress, not status reports.
Test
Real devices, TestFlight, purchase and restore flows, edge cases — everything App Review hits first.
Release
Store listing, screenshots, submission and the answers to review questions. Then updates and support.
A studio that also runs its own portfolio.
Zintex is a mobile product studio based in the EU. We design and build iOS and Android applications for founders and companies — and we publish our own apps under the same name.
That second part changes how we work. We pay for our own mistakes: a rejected build, a paywall that converts badly, a keyword that brings no installs. So when we advise a client, it comes from a store account we own, not from a slide deck.
- A senior core team, with trusted specialists brought in by name when a project needs them
- You own the code, the repository and the store accounts
- NDA by default, GDPR-aware data handling
- Full cycle, outsourcing or a single stage — your call
- Fixed estimate per stage, agreed before work starts
Tell us what you want to build.
Send a short description and we will come back with an honest answer — including “this is not worth building” when that is the truth.
Have an idea sitting in a notes app?
Let's turn it into something people can download. First conversation is free and takes twenty minutes.