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Mobile App Agency

Mobile App Development for iOS, Android, and Modern Products

Advenno is a mobile app agency for teams that need iOS, Android, and cross-platform products backed by clear product strategy, reliable delivery, and launch support.

Trusted by businesses building mobile products across multiple industries

Our Mobile Tech Stack

The Cost of the Wrong App vs. Building With Advenno

Without the right partner

An app users download once and never reopen

  • Laggy, crash-prone builds that get uninstalled fast
  • Two separate iOS & Android codebases doubling cost
  • Broken on the long tail of devices and OS versions
  • Poor onboarding and retention burning your ad spend
  • App Store rejections that stall launch momentum
VS
Built with Advenno

A fast, native-feeling app built to retain users

  • Smooth, near-native performance on every screen
  • One efficient codebase across iOS and Android
  • Tested on real devices, OS versions & networks
  • Onboarding & analytics tuned to keep users active
  • Full App Store & Google Play launch handled for you

Everything Your App Needs

Native iOS Development

Polished Swift & SwiftUI apps tuned for the Apple ecosystem.

Swift / SwiftUIWatch & iPadApp Store

Native Android Development

Production Kotlin builds across the full device range.

Kotlin / ComposeMaterial 3Google Play

Cross-Platform Apps

One codebase, near-native on both iOS and Android.

FlutterReact NativeCode sharing

Backend & APIs

Scalable servers, real-time sync, and secure integrations.

REST / GraphQLFirebase / AWSPush & sync

Strategy, MVPs & Prototypes

Validate the idea before full build with a scoped roadmap.

DiscoveryMVP scopingPrototypes

Launch, Analytics & Retention

ASO, instrumentation, and data-led post-launch growth.

ASOCrash reportingRetention

A Transparent Path From Idea to App Store

On scope, on time, and visible every week. See how we build or browse case studies.

Advenno mobile app development process Five phone-screen stages from idea to a launched app: Discover, Wireframe, Design, Build, and Launch. Discover Goals & roadmap Wireframe Flows & navigation Design Prototypes first Build Agile sprints Launch Store launch & optimize
01

Discover

Audience, goals & a clear roadmap.

02

Wireframe

User flows & navigation patterns.

03

Design

Prototypes you test first.

04

Build

Agile sprints, weekly builds.

05

Test

Real-device QA & security.

06

Launch

Store launch & ongoing optimization.

Swift / SwiftUIKotlinJetpack ComposeFlutterReact NativeDartNode.jsFirebaseGraphQLRealm / SQLiteFastlaneSentry


Our Work in Action

See how we've delivered measurable outcomes for businesses like yours.

Published case studies are loading from the portfolio...

Why Teams Build Apps With Advenno

One codebase for iOS and Android iOS and Android feed into one shared codebase that delivers native performance, faster delivery, offline-ready apps, and support after launch. iOS Android ONE CODEBASE Native performance Smooth on both platforms Faster delivery One team, both stores Offline-ready Works anywhere Support after launch Updates & monitoring

One dedicated team

A direct line to the people building your app — no ticket queues, no hand-offs.

Transparent, weekly

Weekly builds and sprint demos, so you always know exactly where the app stands.

Scalable by design

Clean architecture and cloud-native backends that scale from thousands of users to millions.

Support after launch

OS updates, crash monitoring, and data-led optimization keep your app competitive after launch day.

Fixed scope & timeline You own 100% of the code No vendor lock-in Flexible engagement models

Common Questions About Mobile App Development

Should I build for iOS, Android, or both?

It depends on your target audience and business goals. In markets like the US and UK, iOS users tend to have higher spending power. Globally, Android holds over 70% market share. For most businesses, we recommend starting with cross-platform development using Flutter or React Native to reach both audiences simultaneously at a lower cost.

What is the difference between cross-platform and native development?

Native development uses platform-specific languages (Swift for iOS, Kotlin for Android) and delivers top-tier performance with full access to device APIs. Cross-platform frameworks like Flutter and React Native share a significant portion of code across platforms, reducing both cost and timeline. Advenno recommends native when your app requires heavy graphics, AR, or complex hardware integration, and cross-platform for most other use cases.

How long does it take to build a mobile app?

A focused MVP typically takes 8-12 weeks. A full-featured app with backend integration, authentication, payments, and admin dashboards generally takes 3-6 months. We provide a detailed timeline during discovery so you have clear expectations before any work begins.

Can you help validate an app idea before full development?

Yes. Advenno can run a discovery phase to define the problem, prioritize features, map user flows, and build a prototype or MVP roadmap before you commit to a larger build. That helps reduce launch risk and avoid overbuilding version one.

How much does mobile app development cost?

Cost depends on complexity, platform choice, and feature set. A simple single-platform app might start in the mid five figures, while a complex multi-platform product with custom backend can reach six figures. We provide transparent, fixed-price proposals after a thorough discovery phase so there are no surprises.

Can you improve or take over an existing mobile app?

Yes. We can audit an existing codebase, stabilize release processes, improve architecture, fix crash patterns, modernize the UI, and continue feature development without forcing a full rewrite unless the codebase truly requires it.

Do you handle App Store and Google Play submission?

Yes, we manage the entire submission process for both stores. This includes preparing screenshots, writing optimized descriptions, ensuring compliance with Apple and Google guidelines, and handling any review feedback or rejections. We also set up App Store Optimization (ASO) to improve your discoverability.

What kind of post-launch maintenance do you provide?

Our maintenance packages include OS compatibility updates when Apple and Google release new versions, bug fixes, performance monitoring, crash reporting via Sentry or Crashlytics, security patches, and feature additions. We typically release updates every 4-6 weeks to keep your app stable and competitive.

How do you improve app retention after launch?

We use onboarding reviews, lifecycle messaging, analytics, crash data, App Store feedback, and feature-usage trends to identify where users drop off. From there, we prioritize experiments and updates that improve retention without bloating the product.

Can the app work offline?

Yes. We architect apps with offline-first capabilities using local databases like Realm or SQLite, with intelligent sync mechanisms that reconcile data when connectivity is restored. This is especially important for apps used in areas with unreliable network coverage or for features that need to work without an internet connection.

Ready to Build a Mobile App With Advenno?

Share your app idea and our team will get back to you with an initial strategy and development roadmap.

No commitment required. Free initial consultation.

Get a Project Estimate