App Development Vienna

Professional Mobile Apps for iOS & Android

Q: Native or Cross-Platform – which is better for my project?

Native apps (Swift for iOS, Kotlin for Android) offer maximum performance and platform-specific features but require separate development for each platform. Cross-Platform (React Native, Flutter) enables faster development with one codebase for both platforms, with slight compromises in performance and native features. We advise you based on your requirements, budget and timeline.

Q: How long does it take to develop an app?

A simple MVP app takes 2-3 months, medium-complexity apps with backend integration 4-6 months, complex enterprise apps 6-12+ months. The duration depends on features, platforms (iOS, Android, or both), backend complexity and design requirements. We create a realistic timeline after the discovery phase.

Q: What does app development cost?

App development costs vary significantly depending on project scope and complexity. Key factors include: number of platforms (iOS, Android, or both), desired features, design effort, backend development, and third-party integrations. Every project is unique – that's why we create a customized, transparent quote after a free initial consultation that's tailored exactly to your requirements and budget.

Q: Do you also develop the backend for the app?

Yes, we offer full-stack app development. We develop robust backend systems with Node.js, Python (Django/FastAPI), or PHP (Laravel), including RESTful/GraphQL APIs, database design (PostgreSQL, MongoDB), cloud hosting (AWS, Azure, Google Cloud), authentication, push notifications and more.

Q: Do you offer maintenance and updates after launch?

Yes, we offer comprehensive post-launch support packages: regular updates for new iOS/Android versions, bug fixes and performance optimizations, feature extensions, server maintenance and monitoring, crash reporting and analytics. Flexible monthly maintenance contracts available.

Q: What does app maintenance cost per month?

Monthly maintenance costs depend on the scope of services required. Factors include: complexity of your app, number of active users, server infrastructure, desired update frequency, and support level. We offer flexible maintenance packages – from basic support to comprehensive care with a dedicated developer team. Contact us for a customized maintenance quote that fits your needs and budget.

Q: How do you bill app development – fixed price or hourly?

We offer both billing models and choose the optimal one together with you: Fixed price is suitable for clearly defined projects with a fixed scope – you know exactly what you'll invest from the start. Time & Material (hourly billing) is ideal for agile projects where requirements may evolve. We discuss during the discovery phase which model makes most sense for your project and create a transparent quote with no hidden costs.

Q: What ongoing costs arise after launch?

After launch, various ongoing costs arise: server hosting and cloud services, App Store developer accounts (€99/year Apple, €25 one-time Google), app maintenance and updates, monitoring and analytics tools, possibly push notification services. The amount varies depending on app complexity, number of users, and chosen services. We transparently advise you about all expected costs. Contact us for a detailed cost breakdown for your project.

Native and cross-platform app development from Vienna. From idea to launch – we develop powerful, user-friendly apps with cutting-edge technologies like Swift, Kotlin, React Native and Flutter.

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What is professional app development?

A successful mobile app is more than just code – it's a perfect interplay of intuitive design, robust technology and thoughtful user experience. At 1.wien we develop apps that users love and that are successful in the App Store and Google Play.

We accompany you from the first idea through design, development and testing to launch and beyond. Whether native apps for maximum performance or cross-platform for faster time-to-market – we find the optimal solution for your project and budget.

Native & Cross-Platform

iOS, Android, React Native, Flutter – we master all platforms

Performance First

Optimized for speed, battery efficiency and data usage

Secure & GDPR Compliant

Highest standards for data protection and security

Our App Development Services

Full-service app development from A to Z

iOS App Development

Native iOS apps with Swift and SwiftUI for iPhone and iPad. Optimized for the latest iOS versions, with perfect integration into the Apple ecosystem. Apple Watch and Apple TV support available.

Android App Development

Native Android apps with Kotlin and Jetpack Compose. Material Design 3, optimized for various devices and screen sizes. Support for Android Wear and Android TV.

Cross-Platform Apps

React Native and Flutter for cross-platform apps. One codebase for iOS and Android – faster development, consistent user experience, easier maintenance. Ideal for MVPs and time-to-market.

UI/UX Design

Intuitive, beautiful app designs that delight users. User research, wireframes, prototyping, usability testing. Optimized for touch interactions, accessibility and platform guidelines (Human Interface Guidelines, Material Design).

Backend Development

Robust backend systems for your app: RESTful/GraphQL APIs, database design (PostgreSQL, MongoDB, Firebase), cloud hosting (AWS, Azure, Google Cloud), authentication, push notifications, file storage, real-time features.

Security & Compliance

Secure apps according to highest standards: SSL/TLS encryption, secure authentication (OAuth, biometrics), GDPR compliant, OWASP Mobile Security Guidelines, penetration testing, code obfuscation.

Testing & QA

Comprehensive quality assurance: unit tests, integration tests, UI tests, performance testing, device testing (iOS/Android devices), beta testing (TestFlight, Google Play Beta), bug tracking and fixing.

App Launch & Maintenance

Support from launch to ongoing operations: App Store & Google Play submission, store optimization (ASO), crash reporting (Firebase Crashlytics), analytics integration, regular updates, feature extensions, OS updates.

An Agile Development Process

From idea to successful app in 5 steps

Discovery & Planning

Together we define your vision, target audience and business goals. We create user stories, feature lists, technical architecture and project roadmap. Which platforms? Which features in the MVP? Realistic timeline and budget.

Design & Prototyping

UI/UX design phase: wireframes, user flows, interactive prototypes in Figma. Design reviews and iterations based on your feedback. Final design for all screens and states, optimized for iOS and Android.

Development

Agile development in 2-week sprints. Frontend (iOS/Android/cross-platform), backend APIs, database, authentication, third-party integrations. Regular demos and feedback loops. Code reviews and best practices.

Testing & QA – Phase

Comprehensive testing on various devices and OS versions. Bug fixing, performance optimization, security audits. Beta testing with real users (TestFlight/Play Beta). Preparation for store submission.

Launch & Support

App Store and Google Play submission, support during review process. Launch coordination, marketing assets. Post-launch: monitoring, analytics, crash reporting, user feedback integration, updates and feature extensions.

Flexible App Development Packages

Transparent pricing for every project size

MVP App

Quick Start

From €15,000

One platform (iOS or Android)
5-10 core features
Basic UI/UX design
Backend integration (API)
Basic testing
App Store launch
2-3 months development

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Full-Featured App

Recommended

From €30,000

iOS & Android (cross-platform)
15-25 features
Custom UI/UX design
Full backend development
Push notifications
Authentication & user management
Comprehensive testing & QA
App Store & Google Play launch
Analytics integration
3-6 months development

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Enterprise App

Custom

Individual

Native iOS & Android
Unlimited features
Premium design & branding
Advanced backend (scalable)
Real-time features
Third-party integrations
Enterprise security
Dedicated team
SLA & priority support
Maintenance & updates

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Transparent pricing: The stated prices are indicative. Final costs depend on complexity, features, design effort and third-party integrations. We create a detailed, transparent quote after the discovery phase. Flexible payment models available.

Frequently Asked Questions

Everything you should know about app development

Native apps (Swift for iOS, Kotlin for Android) offer maximum performance and platform-specific features but require separate development for each platform. Cross-Platform (React Native, Flutter) enables faster development with one codebase for both platforms, with slight compromises in performance and native features. We advise you based on your requirements, budget and timeline.

A simple MVP app takes 2-3 months, medium-complexity apps with backend integration 4-6 months, complex enterprise apps 6-12+ months. The duration depends on features, platforms (iOS, Android, or both), backend complexity and design requirements. We create a realistic timeline after the discovery phase.

App development costs vary significantly depending on project scope and complexity. Key factors include: number of platforms (iOS, Android, or both), desired features, design effort, backend development, and third-party integrations. Every project is unique – that's why we create a customized, transparent quote after a free initial consultation that's tailored exactly to your requirements and budget.

Yes, we offer full-stack app development. We develop robust backend systems with Node.js, Python (Django/FastAPI), or PHP (Laravel), including RESTful/GraphQL APIs, database design (PostgreSQL, MongoDB), cloud hosting (AWS, Azure, Google Cloud), authentication, push notifications and more.

Absolutely! We guide you through the entire launch process: App Store Connect and Google Play Console setup, screenshots and store listings, compliance with store guidelines, beta testing (TestFlight, Google Play Beta), submission and review process. We ensure your app complies with store guidelines.

Yes, we offer comprehensive post-launch support packages: regular updates for new iOS/Android versions, bug fixes and performance optimizations, feature extensions, server maintenance and monitoring, crash reporting and analytics. Flexible monthly maintenance contracts available.

Monthly maintenance costs depend on the scope of services required. Factors include: complexity of your app, number of active users, server infrastructure, desired update frequency, and support level. We offer flexible maintenance packages – from basic support to comprehensive care with a dedicated developer team. Contact us for a customized maintenance quote that fits your needs and budget.

We offer both billing models and choose the optimal one together with you: Fixed price is suitable for clearly defined projects with a fixed scope – you know exactly what you'll invest from the start. Time & Material (hourly billing) is ideal for agile projects where requirements may evolve. We discuss during the discovery phase which model makes most sense for your project and create a transparent quote with no hidden costs.

After launch, various ongoing costs arise: server hosting and cloud services, App Store developer accounts (€99/year Apple, €25 one-time Google), app maintenance and updates, monitoring and analytics tools, possibly push notification services. The amount varies depending on app complexity, number of users, and chosen services. We transparently advise you about all expected costs and help achieve an optimal cost-benefit ratio. Contact us for a detailed cost breakdown for your project.

Ready to Realize Your App Idea?

Let's transform your vision into a successful mobile app together. Schedule a free initial consultation and find out how we can bring your app to life.

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