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.
Our Mobile Tech Stack
The Cost of the Wrong App vs. Building With Advenno
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
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.
Native Android Development
Production Kotlin builds across the full device range.
Cross-Platform Apps
One codebase, near-native on both iOS and Android.
Backend & APIs
Scalable servers, real-time sync, and secure integrations.
Strategy, MVPs & Prototypes
Validate the idea before full build with a scoped roadmap.
Launch, Analytics & Retention
ASO, instrumentation, and data-led post-launch growth.
A Transparent Path From Idea to App Store
On scope, on time, and visible every week. See how we build or browse case studies.
Discover
Audience, goals & a clear roadmap.
Wireframe
User flows & navigation patterns.
Design
Prototypes you test first.
Build
Agile sprints, weekly builds.
Test
Real-device QA & security.
Launch
Store launch & ongoing optimization.
Our Work in Action
See how we've delivered measurable outcomes for businesses like yours.
Why Teams Build Apps With Advenno
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.
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.