Mobile App & Web Application Development

Mobile app development cost depends on complexity, platform, and feature scope.

• Simple app (MVP or single-platform): from $5,000
• Mid-complexity app with backend and integrations: $10,000-$30,000+
• Complex or enterprise-grade app: $30,000-$80,000+
• SaaS platforms or custom web applications: project-based

Cost is typically shaped by number of screens, backend requirements, third-party integrations, and native vs cross-platform decisions. Book a free consultation for a tailored quote within 48 hours.

Timelines vary by scope, platforms, and integration depth.

• MVP or simple app: 4-8 weeks
• Mid-complexity app with backend: 8-14 weeks
• Full-featured app or SaaS platform: 14-24+ weeks
• Custom enterprise applications: scoped individually

The biggest timeline drivers are feature complexity, number of platforms, and feedback turnaround speed. Projects are delivered in sprint-based milestones for full visibility.

Both can deliver similar outcomes, but they are delivered differently.

• Mobile app: installed on a device via App Store or Google Play
• Web application: runs in a browser via URL with no download
• A PWA can often bridge the gap between both approaches

During discovery, One S Digital recommends the best option based on users, goals, and budget.

The right choice depends on performance needs, budget, and go-to-market speed.

• Native (Swift/Kotlin): best performance, deepest hardware access, ideal for AR/gaming/performance-heavy apps
• Cross-platform (React Native/Flutter): one codebase for iOS and Android, typically 30-40% faster and more cost-efficient
• Most client projects use cross-platform unless native-level performance is essential

Yes - we build with both and recommend based on project and team context.

• React Native: strong fit for JavaScript/React ecosystems and web-adjacent teams
• Flutter: excellent for polished UI and smooth animation-heavy experiences
• Decision criteria include long-term maintainability and team capability

The stack is selected to match product requirements and growth trajectory.

• Frontend: React, Next.js, Vue.js
• Backend: Node.js, Python (Django/FastAPI), Ruby on Rails
• Databases: PostgreSQL, MongoDB, Firebase
• Infrastructure: AWS, Google Cloud, Vercel
• For SaaS: auth + multi-tenancy, Stripe billing, RBAC, and analytics dashboards

A PWA is a web app that behaves like an installable mobile app.

• Can work offline
• Can send push notifications
• Can be added to a home screen
• Can launch without App Store listing

PWAs are ideal when you need app-like functionality with faster deployment and lower cost. We can help you decide between PWA, native, or both.

An MVP is the smallest usable version of your product used to validate demand quickly.

• Test market demand before full investment
• Collect real user feedback earlier
• Reduce financial and product risk
• Use working traction to support investor conversations

One S Digital has helped 20+ startups launch MVPs in 4-8 weeks by focusing on the highest-learning features first.

Yes. We work with founders from concept to launch, even without technical background.

• Discovery: clarify goals and constraints
• Product strategy: prioritise features and roadmap
• Design: wireframes, UX flows, and interface system
• Build: iterative sprint development
• Launch: QA, deployment, and post-launch iteration

The most effective approach is to test lean before building full scope.

• Define the exact problem and target audience
• Map the minimum feature set that proves the core hypothesis
• Prototype key flows for early testing
• Build a lean MVP and validate in real conditions

This approach often saves clients 50-70% compared to launching a fully featured product too early.

Yes - UI/UX is a core part of delivery, not an optional add-on.

• User research and persona mapping
• Information architecture and journey design
• Wireframes and interactive prototypes
• High-fidelity UI design
• Usability testing and design system setup

Strong design improves retention, conversion, and product trust from day one.

Both disciplines are essential and solve different product problems.

• UX design: structure, flow, task logic, and usability
• UI design: visual language, typography, color, and layout
• Great products require both clarity of flow and visual trust

Yes. We architect backend systems and deliver REST or GraphQL APIs.

• Authentication and authorisation
• Database architecture and management
• Third-party API integrations
• Real-time features (WebSockets/push)
• Cloud infrastructure and scaling setup

A robust backend is what keeps products reliable, secure, and scalable.

Yes - integrations are a core part of most projects.

• Payments: Stripe, PayPal, Apple Pay, Google Pay
• Communication: Twilio, SendGrid, Firebase Cloud Messaging
• Maps: Google Maps, Mapbox
• Analytics: Mixpanel, Amplitude, Google Analytics
• CRM/Marketing: HubSpot, Salesforce, Mailchimp
• Social auth: Google, Apple, Facebook

If a suitable API does not exist, we can build custom integration layers.

Security is built into architecture, implementation, and deployment workflows.

• SSL/TLS encrypted data transport
• OAuth 2.0, JWT, and optional multi-factor authentication
• Protection against SQL injection, XSS, and CSRF
• Role-based access control and data permission boundaries
• Security audits and dependency updates

For regulated or sensitive-data products, additional controls are applied based on compliance needs.

Yes. Scalability planning is included from the first architecture decisions.

• Cloud-native infrastructure with auto-scaling
• Database and API design for growth
• Caching and CDN performance strategy
• Containerised deployments and CI/CD pipelines

Whether you launch at 100 users or target 100,000+, the platform is built to scale without full rework.

Yes - we manage the full submission and review process.

• Store listing setup, screenshots, and metadata
• Compliance checks against Apple and Google policies
• Review cycle handling and approval support
• Post-launch analytics and crash reporting setup

Yes. Ongoing support is available to keep your app healthy and improving.

• Bug fixes and performance monitoring
• OS and dependency updates
• Feature iteration based on user feedback
• Server and infrastructure management
• Analytics reviews and optimisation recommendations

Mobile and web products are living systems. We support their full lifecycle.

Yes. We regularly take over existing apps and stabilise or improve them.

• Code audit: review architecture, quality, and maintainability
• Honest assessment: improve existing base or recommend partial/full rebuild
• Roadmap: prioritised next steps with transparent pricing

We do not recommend rebuilding unless it is genuinely necessary.

The process starts with a free discovery call.

• Discuss your idea, goals, and target users
• Review platform preferences and technical requirements
• Align on timeline and budget range

One S Digital then provides a clear proposal (scope, platform recommendation, timeline, pricing), usually within one week. Ready to build? Book a discovery call or contact us.