Mobile app development in Delhi, built to last.
iOS, Android and cross-platform apps that feel at home on the platform, ship to the stores, and don't embarrass you six months later. Custom mobile apps were the studio's first focus when Techmixin was founded in Delhi in 2021. Today mobile is one of seven disciplines run by one accountable team.
Apps that belong on the phone.
We design and build mobile apps end to end: product design, engineering, store launch and the years of upkeep after it. The people who scope your app are the people who write it, ship it and answer for it.
Brief us on your app →- Native iOS & Android
Platform-correct apps when performance, hardware access or store requirements demand it.
- Cross-platform
Flutter or React Native when a single codebase gives us 90% of the outcome at 50% of the cost. We'll tell you honestly which side of that line your app sits on.
- UI / UX design
In-house product designers who understand mobile patterns and won't send you a Figma file you can't build.
- App Store / Play Store launch
From screenshots to metadata to review responses — we handle the whole submission ritual.
- Maintenance & updates
OS version upgrades, SDK updates, crash monitoring and quarterly feature sprints, so the app keeps working as the platforms move.
Tools picked for the next three years.
We use the right tools — mature or new — based on whether they'll still be here in three years, not on what trended last month.
- iOS
Swift and SwiftUI for modern iOS work; Objective-C for the older codebases we're asked to maintain or rescue.
- Android
Kotlin and Jetpack Compose for apps that feel native on every Android phone your users carry.
- Cross-platform
Flutter or React Native when one codebase across iOS and Android is the sensible trade.
- The backend behind it
An app is only as good as the API it talks to. Our backend & API team builds that too.
- AI inside the app
Chat, search, summarisation, voice and vision, embedded natively by our AI Studio.
From idea to the store, and beyond.
Discovery
Workshops, audits and stakeholder calls. We leave with an honest understanding of the problem, the users and the platforms that matter.
Architecture
Native or cross-platform, data model, API contracts and integrations. Nothing gets built before it's drawn.
UX / UI design
Wireframes, then prototypes, then polished, on-brand screens that respect each platform's patterns.
Build
Weekly sprints, transparent boards and live staging builds. You get access to the repo and task board from week one.
QA & launch
Automated and manual QA, store submissions and go-live runbooks. We don't launch and run.
Steward
Monitoring, bug fixes, OS upgrades and a feature roadmap. A named engineer stays on your app.
Fashion marketplace, India
A native iOS and Android shopping app that blends traditional artistry with a modern commerce flow — bespoke fashion and handcrafted accessories, delivered from India to smartphones worldwide. We owned the build end to end.
◆ Client names and screens are withheld under NDA. References available on request.
- Payment gateway integration
A custom catalog engine and checkout wired to an integrated payment gateway.
- Real-time order tracking
Customers follow every order from cart to doorstep.
- Loyalty program & push notifications
Rewards and timely updates that keep customers informed and coming back.
- Also in the casework
A verified doctors network on iOS and Android, with role-based authentication, scheduling and secure peer discussion.
What clients ask before an app build.
It depends on what the app has to do. We build native Swift and Kotlin apps when performance, hardware access or store requirements demand it, and Flutter or React Native when a single codebase gives 90% of the outcome at 50% of the cost. We make that call with you in discovery, before any code is written.
Yes. We handle the whole submission ritual: screenshots, store metadata, review responses and go-live runbooks. Launch is part of the job, not an extra. Once the app is live we keep it current with OS version upgrades, SDK updates and crash monitoring, so it keeps working as Apple and Google change their platforms.
You do. Every project ships with full IP transfer, clean git history, complete documentation and access to all cloud accounts in your name. You also get access to the repository, task board and staging builds from week one, so nothing about your app is hidden until a big reveal at the end.
Yes, often. Many of our best engagements start with "the last team left us this mess". We begin with an audit of the code, architecture and release setup, ship a stabilisation plan, and take it from there, including older Objective-C codebases that need to keep running while they are modernised.
Yes. Our core team is in Delhi, India, and works with partners across India and neighbouring time zones. For global clients we align to overlap windows and hold weekly video reviews. Every client talks directly to the engineer or designer building the app; there are no account managers in between.
Brief us on your app.
Tell us what you're building, inheriting, or trying to fix. We'll reply within 24 hours with honest next steps — whether we're the right team or not.