Mobile vs web: which platform to build first

One of the first decisions you'll make is whether to build for mobile or web first. The wrong choice can cost you months and thousands of dollars.

Here's how to make the right decision for your business.

Start with Your Users

The platform decision should be driven entirely by how your users will interact with your product:

Build Mobile First If:

• Users need on-the-go access
• You require device features (camera, GPS, notifications)
• The product is consumer-focused
• Usage is frequent and short-duration
• Social features are core to the experience

Build Web First If:

• Users work primarily on desktops
• The interface is complex or data-heavy
• B2B or enterprise target market
• SEO and discoverability are important
• You need fast iteration and testing

Development Complexity

Mobile development is inherently more complex:

• Two platforms to maintain (iOS + Android)
• App store approval processes
• Different device sizes and capabilities
• More testing requirements
• Update deployment is slower

Web development allows for faster iteration and easier updates.

Cost Comparison

Mobile Development:

• Native (iOS + Android): $80,000-$250,000
• React Native: $50,000-$150,000
• Timeline: 4-8 months

Web Development:

• Responsive web app: $30,000-$100,000
• Progressive Web App: $40,000-$120,000
• Timeline: 2-4 months

The Progressive Web App Solution

PWAs offer a compelling middle ground:

• Single codebase works on all platforms
• Install on home screen like native apps
• Access device features
• Work offline
• Push notifications
• No app store approval needed

For many products, a PWA is the optimal starting point.

Real-World Examples

Web First Success:

Figma started web-only and dominated design tools before adding desktop apps. Notion followed the same path.

Mobile First Success:

Instagram and Snapchat started mobile-only and added web as secondary platforms later.

Our Recommendation

For most B2B SaaS products: Start with web.

• Faster development
• Lower cost
• Easier iteration
• Better for complex interfaces

For consumer products: Consider PWA first, then native if proven successful.

The Hybrid Approach

Many successful products take a hybrid approach:

1. Launch responsive web MVP
2. Validate product-market fit
3. Add PWA capabilities
4. Build native mobile if justified by data

This approach minimizes risk and ensures you're investing in the right platform based on real user behavior.