Question 1

How much does it cost to build a web application?

Accepted Answer

Web application costs scale with complexity across **four tiers**. A marketing website with CMS costs $5,000-25,000. A simple web app (CRUD operations, user authentication, basic dashboard) costs $25,000-75,000. A complex web app (real-time features, third-party integrations, advanced UI, role-based permissions) costs $75,000-250,000. Enterprise applications with complex business logic, high availability requirements, and extensive integrations can exceed $500,000. These ranges include design, frontend and backend development, testing, and initial deployment. Ongoing maintenance adds **15-20% of the initial cost annually** for hosting, bug fixes, dependency updates, and feature enhancements. The biggest cost driver is scope: every additional feature adds not just development time but testing, documentation, and long-term maintenance burden.

Question 2

Should I build a mobile app or a responsive website?

Accepted Answer

**Start with a responsive website** unless you specifically need: offline functionality (field service, travel apps), push notifications for time-sensitive engagement, access to device hardware (camera for scanning, GPS for tracking, sensors), intensive background processing, or presence in app stores for discoverability. Progressive Web Apps (PWAs) bridge many of these gaps, offering installability, basic offline support, and push notifications through the browser. If you do need a native app, consider launching the responsive website first to validate demand and user behavior, then build the app informed by real usage data. Building a mobile app before proving product-market fit is one of the most common and expensive mistakes startups make. The website costs 50-70% less and can be iterated 3x faster.

Question 3

What technology stack should I use?

Accepted Answer

For most web applications, the **recommended modern stack** is: React or Next.js (frontend, component-based UI with strong ecosystem), Node.js or Python (backend, depending on your team's expertise), PostgreSQL (database, reliable and feature-rich), and a cloud platform (Vercel for Next.js, AWS for complex infrastructure, or GCP for AI-heavy applications). For mobile: React Native if your team already knows React (shared knowledge, 70-80% code reuse), Flutter if starting fresh (excellent performance, beautiful UI, growing ecosystem). The best stack is genuinely the one your team can build and maintain effectively. Technology preferences matter far less than **developer productivity, ecosystem maturity, and long-term maintainability**. Avoid choosing bleeding-edge frameworks for production applications unless you have deep expertise.

Question 4

How long does it take to build an MVP?

Accepted Answer

A focused MVP takes **8-12 weeks** with a dedicated team of 2-4 developers plus a designer. The typical timeline: planning and design (2 weeks, defining core user flows and UI), core feature development (4-6 weeks, building the 3-5 features that validate your hypothesis), testing and iteration (1-2 weeks, QA, performance testing, user testing with beta users), and launch preparation (1 week, deployment, monitoring setup, analytics). The critical success factor is **ruthless scope management**: limit the MVP to the minimum set of features that lets early users experience the core value proposition. Every feature beyond the minimum extends the timeline and delays learning. Common scope traps that add 4-8 weeks: admin dashboards (use direct database queries initially), complex user roles (start with one role), social features (add after product-market fit), and mobile apps (launch web-only first).

Question 5

What is the difference between React and Next.js?

Accepted Answer

**React** is a UI library for building component-based interfaces. It handles rendering, state management, and component lifecycle. You pair it with a bundler (Vite), a router (React Router), and your own backend. React with Vite is ideal for single-page applications behind authentication, such as dashboards, admin panels, and internal tools, where SEO is not critical. **Next.js** is a full framework built on React that adds server-side rendering (SSR), static site generation (SSG), file-based routing, API routes, middleware, and deployment optimization. Use Next.js for SEO-critical sites (marketing pages, e-commerce, blogs), full-stack applications where you want frontend and backend in one codebase, and applications needing fast initial page loads for public-facing content. Next.js adds complexity and hosting requirements (Node.js server) compared to React's simpler static deployment.

Question 6

How do I ensure my web application is secure?

Accepted Answer

Application security requires a **layered approach** covering multiple attack surfaces. Authentication: use established libraries (NextAuth, Clerk, Supabase Auth) instead of building from scratch, implement multi-factor authentication for sensitive applications, and use httpOnly cookies for session tokens. Authorization: implement role-based access control at the API level (not just the UI), validate permissions server-side for every request. Input handling: sanitize and validate all user input server-side (client-side validation is a UX feature, not a security measure), use parameterized queries to prevent SQL injection, and encode output to prevent XSS. Infrastructure: enforce HTTPS everywhere, keep all dependencies updated (automate with Dependabot or Renovate), implement rate limiting on authentication and API endpoints, and encrypt sensitive data at rest and in transit. Conduct security audits at launch and annually thereafter.

Question 7

What is the difference between native and cross-platform mobile development?

Accepted Answer

**Native development** (Swift/SwiftUI for iOS, Kotlin/Jetpack Compose for Android) provides the best performance, deepest platform integration (widgets, system features, latest OS capabilities), and smoothest user experience. The tradeoff: you maintain two separate codebases with different languages, frameworks, and developer skill sets, roughly doubling development and maintenance costs. **Cross-platform frameworks** (React Native, Flutter) share 70-90% of code between iOS and Android from a single codebase. React Native uses JavaScript/React (leveraging existing web developer skills), while Flutter uses Dart with a custom rendering engine for consistent, high-performance UI. For most business applications (e-commerce, CRM, productivity, social), cross-platform delivers equivalent user experience at 40-60% lower cost. Choose native only for performance-critical applications (games, video editing, AR), apps requiring deep platform integration, or when budget allows separate iOS/Android teams.

Question 8

How do I maintain and update my application after launch?

Accepted Answer

Post-launch maintenance covers **five ongoing activities**: bug fixes and performance monitoring (continuous, using tools like Sentry for error tracking and Datadog or Vercel Analytics for performance), dependency and security updates (monthly, automated scanning with Dependabot plus manual review of major version upgrades), feature enhancements based on user feedback and analytics (sprint-based, typically 2-week cycles), infrastructure scaling as usage grows (monitor database performance, API response times, and hosting costs quarterly), and regular backup verification and disaster recovery testing (quarterly). Budget **15-20% of the initial development cost annually** for maintenance. For a $100K application, plan $15,000-20,000/year. Neglecting maintenance creates compounding technical debt: dependencies fall behind, security vulnerabilities accumulate, and eventually the cost of catching up exceeds the cost of consistent maintenance.

Web & Mobile Development FAQ

8 Questions Answered

Related FAQ Categories

CRM FAQ

E-commerce FAQ

Still Have Questions?