Common Issues mobile

My App Looks Terrible on Phones

Your app or website looks great on a computer, but when you or your customers open it on a phone, it's a disaster. Text is tiny and unreadable, content spills off the edges of the screen, menus overlap with other elements, or you have to pinch and zoom just to use it.

This is a huge problem because more than half of all internet traffic comes from phones. If your app doesn't work on mobile, you're turning away the majority of your potential users or customers. They'll leave and never come back.

AI tools often generate apps that look great on a desktop monitor but weren't properly tested or designed for smaller screens. The good news is that most mobile layout problems can be fixed without redesigning the entire app.

Error Messages You Might See

No error messages — just a poorly displayed layout Content wider than viewport (in Google Search Console) Mobile usability issues detected (Google warning) Text too small to read (Google PageSpeed)
No error messages — just a poorly displayed layoutContent wider than viewport (in Google Search Console)Mobile usability issues detected (Google warning)Text too small to read (Google PageSpeed)

Common Causes

  • Missing viewport tag — Your app's HTML is missing a small piece of code that tells phones how to display it, so the phone shows the desktop version shrunken down
  • Fixed-width layouts — Elements are set to exact pixel sizes (like 1200px wide) instead of adapting to the screen size
  • No mobile-friendly design rules — The CSS (styling code) doesn't include any adjustments for smaller screens
  • Images too large — Big desktop images don't resize on mobile, causing horizontal scrolling
  • AI prioritized desktop — The AI tool built the desktop version first and didn't properly adapt it for mobile

How to Fix It

  1. Test on a real phone — Open your website on your actual phone to see exactly what users experience. Screenshots from desktop tools can miss real issues
  2. Use your browser's mobile preview — On your computer, press F12 then click the phone/tablet icon to preview how the site looks on different phones
  3. Ask a developer to add responsive design — A developer can add the viewport tag and mobile-friendly CSS rules to make your layout adapt to any screen size
  4. Check that images are responsive — All images should have max-width: 100% so they shrink to fit the screen instead of overflowing
  5. Test the most important pages first — Focus on fixing the homepage, product pages, and checkout flow for mobile before worrying about less-visited pages

Real developers can help you.

Milan Surelia Milan Surelia Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems. Expertise: 💡 Developing cross-platform apps using Flutter, Dart, and Jetpack Compose for Android, iOS, and Web. 🖋️ Sharing insights through technical writing, blogging, and open-source contributions. 🤝 Collaborating closely with designers, PMs, and developers to build seamless mobile experiences. Notable Achievements: 🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX. 🚀 Launched Compose101 — a Jetpack Compose starter kit to speed up Android development. 🌟 Open source contributions on Github & StackOverflow for Flutter & Dart 🎖️ Worked on improving app performance and user experience with smart solutions. Milan is always happy to connect, work on new ideas, and explore the latest in technology. David Olverson David Olverson Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production. Taufan Taufan I’m a product-focused engineer and tech leader who builds scalable systems and turns ideas into production-ready platforms. Over the past years, I’ve worked across startups and fast-moving teams, leading backend architecture, improving system reliability, and shipping products used by thousands of users. My strength is not just writing code — but connecting product vision, technical execution, and business impact. Matthew Butler Matthew Butler Systems Development Engineer @ Amazon Web Services AUXLE AUXLE I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies. Yovel Cohen Yovel Cohen I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well. Rudra Bhikadiya Rudra Bhikadiya I build and fix web apps across Next.js, Node.js, and DBs. Comfortable jumping into messy code, broken APIs, and mysterious bugs. If your project works in theory but not in reality, I help close that gap. Matthew Jordan Matthew Jordan I've been working at a large software company named Kainos for 2 years, and mainly specialise in Platform Engineering. I regularly enjoy working on software products outside of work, and I'm a huge fan of game development using Unity. I personally enjoy Python & C# in my spare time, but I also specialise in multiple different platform-related technologies from my day job. Krishna Sai Kuncha Krishna Sai Kuncha Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : ) Dor Yaloz Dor Yaloz SW engineer with 6+ years of experience, I worked with React/Node/Python did projects with React+Capacitor.js for ios Supabase expert

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Frequently Asked Questions

Why does it look fine on my computer but not my phone?

Computer screens are typically 1200-1920 pixels wide, while phones are only 375-430 pixels wide. If your app was built for the wider screen without rules for adapting to smaller screens, it will look squished or require scrolling on a phone.

Will fixing the mobile layout affect how it looks on desktop?

No, if done properly. Responsive design uses conditional rules — mobile devices get one layout, tablets get another, and desktops keep the original. A developer can add mobile rules without changing anything on desktop.

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