App Development Services
Looking for professional app development services to bring your idea to life? I build modern iOS and Android apps backed by secure, scalable cloud systems — designed for real businesses, startups, and MVPs.
Serving Oshkosh, the Fox Valley, and clients nationwide.
From Idea to Production
Whether you need a quick MVP or a full production app, I handle the entire process: planning, development, backend infrastructure, and deployment — all in one place.
Custom App Development Services
My app development services cover the full lifecycle of building a mobile application. I don’t just write code — I help you design, build, and launch an app that solves real problems and scales over time.
iOS App Development
Native iOS apps built with SwiftUI for iPhone and iPad. Clean design, smooth performance, and App Store-ready delivery.
Android App Development
Native Android apps using Kotlin and Jetpack Compose, following modern Android architecture best practices for maintainability and speed.
Backend & API Development
Secure APIs, databases, authentication, cloud hosting, and integrations built with .NET and Azure. Ideal for mobile apps, dashboards, and internal tools.
What Types of Apps Do I Build?
My app development services are commonly used for:
- MVPs for startups and new ideas
- Scheduling and booking applications
- Internal business tools and dashboards
- Customer-facing mobile apps
- Fitness, wellness, and productivity apps
- Service-based business applications
If your workflow is currently spread across spreadsheets, emails, or manual steps, a custom app can often simplify everything.
Production Experience: PumpPal
I’m the creator of PumpPal, a production-ready cross-platform fitness app built using the same technologies I offer through my app development services.
Modern Mobile Frameworks
SwiftUI on iOS and Jetpack Compose on Android for fast development and a clean, modern user experience.
Cloud-Backed Architecture
.NET backend services, SQL databases, and Azure Blob Storage designed for reliability and scale.
Real-World App Lifecycle
App store submissions, updates, analytics, error handling, and long-term maintenance — not just a demo app.
Why Choose Sinnard Technologies?
End-to-End Delivery
One developer handling the app, backend, and deployment means fewer handoffs and faster progress.
Modern Tech Stack
I focus on current, supported technologies — not outdated frameworks that slow your app down.
Clear Communication
You’ll get honest estimates, clear milestones, and direct access to the person writing the code.
Start Your App Project
If you’re ready to explore professional app development services, reach out and tell me what you’re building. I’ll help you define the scope, timeline, and next steps.
Get Started