Mobile App Development Services
StepTo builds high-performance mobile apps for iOS, Android, and cross-platform — with a relentless focus on user experience, reliability, and rapid iteration. Our nearshore engineering teams in Belgrade, Serbia work in your timezone (CET) and ship production-grade apps at 40-60% below typical Western European and US agency rates. We help enterprises, scale-ups, and founders launch apps that users keep on their home screen. Looking to extend your own team instead? See our mobile app developer hiring guide.
Mobile Solutions We Deliver
- Native iOS & Android — Swift and Kotlin apps that take full advantage of platform APIs, hardware, and performance for demanding, polished products.
- Cross-platform (React Native & Flutter) — a single shared codebase when speed to market and a lean maintenance budget matter more than per-platform fine-tuning.
- Backend, APIs & cloud sync — REST/GraphQL services, real-time data, offline support, and push notifications on AWS, Google Cloud, or Firebase.
- App Store & Google Play launch — submission, review-guideline compliance, and the iterative fixes approval often requires.
- Post-launch analytics & growth — instrumentation, A/B testing, crash monitoring, and a roadmap of data-driven updates.
How We Build Mobile Apps
- Discovery & scoping — we map the core user journeys, prioritise an MVP feature set, and choose native vs. cross-platform based on your real constraints.
- Design & prototyping — clickable prototypes validate flows before a line of production code is written.
- Two-week build sprints — demoable builds every sprint so you steer the product continuously, not at the end.
- QA & store launch — automated tests, device-farm runs, manual QA, and submission to both stores.
- Maintenance & iteration — OS-version upkeep, security patches, and ongoing feature development.
Why StepTo
- Senior engineers with shipped apps across fintech, healthcare, e-commerce, and logistics.
- CET-timezone collaboration — daily standups and real-time communication, not async-only handoffs.
- 40-60% cost savings versus Western European and US agencies at equivalent seniority.
- Security and compliance (GDPR, app-store data policies) built in from day one.
- Full IP ownership and clean, documented, handover-ready codebases.
FAQ: Mobile App Development
- Do you build both iOS and Android apps?
- Yes. We build native iOS (Swift) and Android (Kotlin) apps, as well as cross-platform apps with React Native and Flutter when a single shared codebase is the better fit for budget and timeline. We recommend the approach based on your performance, hardware-access, and maintenance requirements rather than defaulting to one technology.
- How much does it cost to build a mobile app with StepTo?
- Most mobile MVPs fall between $30,000 and $80,000 depending on scope, number of platforms, and backend complexity. Because our engineers are based in Serbia, blended rates run 40-60% below comparable Western European or US agencies for the same seniority. See our pricing page for current rate bands.
- Can you handle backend, APIs, and cloud integration?
- Absolutely. We deliver the full stack — REST/GraphQL APIs, real-time sync, push notifications, and cloud infrastructure on AWS, Google Cloud, or Firebase — so the app and its services are built and maintained by one accountable team.
- How do you ensure app quality and store approval?
- Every release goes through automated unit and UI testing, device-farm testing across real hardware, and manual QA. We also handle App Store and Google Play submission, review guidelines, and the post-launch fixes that approval often requires.
- How long does it take to launch a mobile app?
- A focused MVP typically reaches the stores in 8-16 weeks. We work in two-week sprints with demoable builds throughout, so you see and steer progress continuously instead of waiting for a single final delivery.
- Do you provide post-launch support and updates?
- Yes. We offer ongoing maintenance covering OS-version updates, security patches, analytics-driven improvements, and new feature development under a dedicated-team or retainer arrangement.