Custom Mobile App Development
Building powerful mobile products that connect you with your audience, streamline operations, and unlock new revenue opportunities.
Depot39 delivers custom mobile applications designed for performance, scalability, and long-term product growth—whether you’re launching an MVP or scaling an established platform.
We focus on business value first, combining strategy, design, and engineering to create mobile apps users love and businesses rely on.
Native Mobile App Development
Android App Development Services
Our Android developers build high-performance applications for smartphones, tablets, and wearable devices, leveraging the full Android ecosystem.
We go beyond implementation—analyzing user behavior, feedback, and usage patterns to ensure your app delivers intuitive UX and meaningful functionality that drives engagement.
What we deliver
- Custom Android apps built with modern frameworks and best practices
- Optimized performance across a wide range of devices
- Scalable architecture prepared for future growth
iOS App Development Services
Our iOS engineers and designers work closely to deliver polished applications that align with Apple’s ecosystem and user expectations.
We strictly follow Apple’s development and UX guidelines to create reliable, secure, and elegant solutions for iPhone, iPad, Apple Watch, and Apple TV.
What we deliver
- High-quality native iOS applications
- Seamless UX aligned with Apple Human Interface Guidelines
- App Store–ready solutions built for long-term maintainability
Cross-platform Mobile Development
Faster Time-to-Market & Cost Efficiency
Cross-platform development allows you to reach multiple mobile platforms with a single, well-structured codebase—without compromising quality.
Depot39 applies proven architectural patterns and modular design to ensure flexibility, scalability, and performance throughout the product lifecycle.
Key benefits
- Reduced development and maintenance costs
- Faster market entry
- Shared business logic with native-level performance
Market Entry & Hypothesis Validation
Cross-platform apps are ideal for validating product ideas quickly and gathering early user feedback across platforms.
We design modular architectures that make it easy to test, iterate, replace, or extend functionality based on real-world data—minimizing risk while maximizing learning speed.
How Mobile App Development Works
01
Explore
When your idea evolves into an early-stage product, the main challenge is identifying the most valuable features and assumptions.
At this stage, we help you:
- Launch fast with minimal risk
- Reduce the cost of future changes
- Collect and analyze user behavior and feedback
02
Expand
As your app gains traction, new challenges emerge—scalability, performance, and operational efficiency.
At this stage, we help you:
- Identify and resolve technical and product bottlenecks
- Adapt architecture to growing user demand
- Improve stability, performance, and UX consistency
03
Extract
Once your product matures, focus shifts toward optimization and ROI maximization.
At this stage, we help you:
- Optimize infrastructure and processes to reduce operational costs
- Experiment with new features and monetization strategies
- Strengthen your market position through continuous improvement
Our Craft
Strategy & Features
Our Product Managers and Business Analysts work with you to shape a clear product vision and roadmap aligned with your business goals.
Feature prioritization and MVP definition
Optimal platform selection (native vs cross-platform)
A/B testing, monetization strategies, and go-to-market support
UI/UX Architecture
Our UX designers and software architects collaborate from day one to ensure usability, accessibility, and technical feasibility evolve together.
UX concepts, wireframes, and user journey mapping
Mobile and backend architecture design
Accessibility-aware UX and scalable system design
Development
Our mobile engineers, architects, designers, and QA specialists work in iterative cycles to deliver value early and often.
UI-first development aligned with Apple and Google guidelines
Continuous integration and iterative delivery
Quality assurance, performance testing, and security validation
Launch & Ongoing Support
Launching the app is only the beginning. We support your product well beyond release, helping it evolve with your users and business needs.
App Store and Google Play launch assistance
Feature flags for controlled rollouts and experimentation
1st, 2nd, and 3rd line support and maintenance services
Depot39 is extremely reliable, detail-oriented, and consistently delivers top-quality work. Working with them is always an exceptional experience.
Julian Gleizer
Founder & CEO at INABUGGY Inc. (Formerly InstaBuggy Inc.)