Custom Mobile App Development That Ships Fast — and Scales to Millions.
We build native iOS, Android, and cross-platform mobile applications for companies that can’t afford slow launches or fragile code. From MVP to enterprise-grade — 50+ apps shipped across healthcare, fintech, media, and real-time communication.
Trusted by Product Teams Worldwide
Sound Familiar?
Your mobile app is 6 months behind schedule — and the backlog keeps growing.
Your dev team promised an MVP in 3 months, but scope creep, platform-specific bugs, and underestimated complexity pushed launch past every deadline. Each delay burns budget and gives competitors more runway.
The app works on one platform — but your users are on both.
You launched on iOS first to move fast. Now Android users account for 60% of your target market and you’re facing a full rebuild. Maintaining two separate native codebases is doubling your cost without doubling your reach.
Performance issues are killing your retention — and you can't pinpoint why.
The app crashes on older devices, animations stutter, and load times spike during peak hours. Users don’t file bug reports — they uninstall. Your team is firefighting symptoms instead of fixing the architecture.
Security and compliance weren't built in — now they're blocking your launch.
HIPAA, PCI-DSS, GDPR — the compliance requirements your industry demands weren’t part of the original architecture. Retrofitting security into a live mobile app is expensive and risky, but launching without it isn’t an option.
You need real-time features — but your current stack can't handle them.
Push notifications, live chat, video calls, location tracking — every real-time feature you add exposes new infrastructure gaps. WebSocket connections drop, battery drain complaints spike, and your backend wasn’t designed for persistent connections at scale.
You can't find senior mobile developers — or keep them.
The market for experienced iOS and Android engineers is brutally competitive. You’ve burned months on hiring, onboarding, and losing talent to bigger offers. Meanwhile, your product roadmap is stalled.
The Cost of a Delayed Mobile Launch
Every month a mobile app misses its launch window costs an average of 8-12% of projected first-year revenue. For apps in competitive markets, the window between first-mover advantage and “also-ran” is measured in weeks, not years.
These aren’t hypothetical problems. They’re the exact situations product teams bring to us — usually after their first vendor or internal team hit a wall.
Mobile App Development Services
Native iOS Development
For teams targeting the Apple ecosystem.
We build performant, App Store-ready iOS applications using Swift and SwiftUI. From iPhone and iPad to Apple Watch and Apple TV — designed for the platform, not ported to it.
- Native performance with SwiftUI and Combine
- Full Apple ecosystem coverage (iPhone, iPad, Watch, TV)
- App Store optimization and approval expertise
- Seamless integration with HealthKit, ARKit, Core ML
Native Android Development
For teams building for the world's largest mobile platform.
We develop Android applications using Kotlin and Jetpack that work flawlessly across the fragmented Android device landscape — from flagship phones to budget devices, tablets, and Android TV.
- Kotlin-first architecture with Jetpack Compose
- Tested across 50+ device configurations
- Google Play optimization and policy compliance
- Integration with Android Auto, WearOS, and Android TV
Cross-Platform Development
For teams that need both platforms without two codebases.
We build cross-platform mobile apps with React Native and Flutter that share up to 90% of code between iOS and Android — without sacrificing native performance or platform-specific UX patterns.
- Single codebase for iOS and Android
- 30-40% faster time-to-market vs. dual native builds
- Native module integration where performance matters
- Hot reload development for rapid iteration
How We Build Mobile Apps
Discovery & Strategy
We analyze your business goals, target users, and technical requirements. You get a product roadmap, platform recommendation (native vs. cross-platform), architecture blueprint, and realistic timeline — before a single line of code is written.
UX/UI Design
Our designers create wireframes, interactive prototypes, and pixel-perfect UI following iOS Human Interface and Material Design guidelines. You review and approve every screen before development begins.
Agile Development
We build in 2-week sprints with demo deployments after each cycle. You see working code every two weeks, provide feedback, and adjust priorities — not after 6 months of silence.
QA & Testing
Automated and manual testing across real devices. We test on 50+ device/OS combinations, run performance profiling, security audits, and regression testing. Every sprint ships with test coverage reports.
Deployment & Launch
We handle App Store and Google Play submission, metadata optimization, and approval process. We’ve launched 50+ apps with a 100% first-submission approval rate by following platform guidelines from day one.
Maintenance & Growth
Bug fixes, OS update compatibility, performance monitoring, and feature development. We don’t disappear after launch — most clients continue development for 12+ months as their user base grows.
Mobile Technology Expertise
We choose the right tool for the job — not the trendiest framework. Here’s what we work with daily.
iOS
Android
Cross-Platform
Backend & APIs
Real-Time & Media
DevOps & CI/CD
Mobile Apps We've Built
Real projects. Real users. Real results.
DateNight — Video-First Dating Platform
DateNight USA
Challenge: Build a video-first dating platform where the first interaction is always a live video call — eliminating catfishing and creating authentic connections from the start.
- WebRTC video dating with sub-3-second connection times
- AI-powered matching based on conversation compatibility
- Integrated safety features: screenshot blocking, report system
- Launched on iOS and Android simultaneously
Enterprise Messaging Platform with Video
Enterprise Client USA
Challenge: Create a secure cross-platform messaging application with real-time video calling, file sharing, and end-to-end encryption for enterprise teams.
- Real-time messaging with WebSocket infrastructure
- HD video calls supporting 50+ concurrent participants
- End-to-end encryption for all communications
- Native iOS and Android apps with shared codebase
Stusan — Video Conferencing & Meeting Platform
Stusan Europe
Challenge: Build a scalable video conferencing platform with screen sharing, recording, breakout rooms, and mobile-first design for remote teams.
- Video meetings supporting 200+ simultaneous participants
- Screen sharing, recording, and real-time transcription
- Mobile apps with push notifications and background audio
- Adaptive bitrate streaming for unstable connections
What Our Clients Say
“They know the inner workings of the tech and were able to inherit our semi-functional code and get it to work where multiple prior teams couldn’t.
“Trembit are developing our Adobe Air SDK for the last 3 years. The team is always responsive and helpful when we need their help and expertise.
“The Trembit team demonstrated deep expertise in real-time communication and delivered a scalable video infrastructure that handles thousands of concurrent streams.
Why Choose Trembit for Mobile Development?
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10+ Years of mobile expertise
Battle-Tested Experience
We’ve been building mobile apps since before Swift existed. Our team has shipped 50+ apps across iOS, Android, and cross-platform — from startup MVPs to enterprise solutions handling millions of users.
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100% App Store approval rate
Launch Confidence
Every app we’ve submitted has been approved on first submission. We build to platform guidelines from day one — not as an afterthought before launch. No rejections, no delays, no surprises.
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2-Week Sprint demo cadence
Transparent Process
You see working code every two weeks. Sprint demos, shared task boards, async Slack updates, and direct access to your engineering team. No black box — you always know where your project stands.
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12+ Mo Average client engagement
Long-Term Partnership
Most clients stay well beyond the initial build. We don’t optimize for project handoff — we optimize for product success. Your mobile app grows, and we grow with it.
Flexible Engagement Models
Dedicated Team
A full mobile squad — developers, QA, PM — embedded in your process. You manage priorities, we handle execution.
Best for: Long-term products with evolving roadmaps and ongoing feature development.
Time & Materials
Pay for actual hours worked with full transparency. Adjust scope and team size as your project evolves.
Best for: Projects with flexible scope, R&D phases, or ongoing feature development.
Fixed Price
Defined scope, locked budget, guaranteed delivery. No surprises — you know the cost before we start.
Best for: MVPs, well-scoped features, and projects with clear requirements.
Frequently Asked Questions
Let’s Build Your Mobile App
Tell us about your project and we’ll get back within 24 hours with a free consultation and initial estimate.
Whether you’re starting from scratch, scaling an existing app, or rescuing a stalled project — we’ve seen it before and we can help.