Mobile apps convert 3x higher than mobile websites. But they also cost 5-10x more to build and require ongoing maintenance. The right choice depends on your stage, audience, and resources.
Conversion Rate Reality Check
Apps: 3-5% average conversion rate. Mobile websites: 1-2%. Desktop: 3-4%. Apps win on conversion because: logged-in users have saved payment info, push notifications drive return visits, native UX feels faster and smoother, and app users are inherently more engaged (they chose to install).
User Behavior: App vs Browser
App users spend 3x more time shopping, view 4.2x more products, and have 2x higher average order value. But — and this is crucial — mobile web drives 3x more unique traffic. You need the website for discovery and the app for retention. They're complementary, not competitive channels.
Development & Maintenance Cost
Mobile website optimization: $10,000-30,000. Native ecommerce app: $50,000-200,000+. Cross-platform app (Flutter): $30,000-100,000. Ongoing app maintenance: $1,000-5,000/month. PWA approach: $15,000-40,000 with many app-like capabilities. Budget-conscious brands should start with a PWA and graduate to a native app when unit economics support it.
When a Mobile App Makes Sense
Build an app when: you have 100,000+ monthly active mobile users, your repeat purchase rate exceeds 30%, you need push notifications for engagement, your product benefits from native features (camera, AR try-on), or your competitors have apps that drive loyalty.
When Mobile Web Wins
Mobile web is better when: you're focused on customer acquisition (SEO, ads), your customer base is price-sensitive (won't install apps for one purchase), you're in early growth stage, or your product is considered purchase (infrequent buying).
The Optimal Strategy
Most successful ecommerce brands use both: a highly optimized mobile website for discovery and acquisition, plus a native app for loyal customers. The website converts browsers into buyers; the app converts buyers into repeat customers. Start with mobile web optimization, add an app when your repeat customer base justifies it.
Conclusion
The app vs website question isn't binary. Build a stellar mobile website first, then layer a native app when your customer base demands it. Revenue data, not assumptions, should drive this decision.