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.

Stanislav Prigodich Stanislav Prigodich 15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it. Prakash Prajapati Prakash Prajapati I’m a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale. hanson1014 hanson1014 Full-stack developer experienced in fixing and deploying AI-generated apps from Lovable, Bolt.new, Cursor, and Replit. I specialize in debugging Supabase integration issues (auth flows, RLS policies, database connections), fixing broken deployments, resolving routing/blank screen problems, and cleaning up messy React/Vite codebases. I also build production apps with the Claude API and have shipped a Mac desktop dev tool (Nexterm from scratch. Based in Hong Kong, fast turnaround. zipking zipking I am a technologist and product builder dedicated to creating high-impact solutions at the intersection of AI and specialized markets. Currently, I am focused on PropScan (EstateGuard), an AI-driven SaaS platform tailored for the Japanese real estate industry, and exploring the potential of Archify. As an INFJ-T, I approach development with a "systems-thinking" mindset—balancing technical precision with a deep understanding of user needs. I particularly enjoy the challenge of architecting Vertical AI SaaS and optimizing Small Language Models (SLMs) to solve specific, real-world business problems. Whether I'm in a CTO-level leadership role or hands-on with the code, I thrive on building tools that turn complex data into actionable value. 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. Anthony Akpan Anthony Akpan Developer with 8 years of experience building softwares fro startups Pratik Pratik SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure Caio Rodrigues Caio Rodrigues I'm a full-stack developer focused on building practical and scalable web applications. My main experience is with **React, TypeScript, and modern frontend architectures**, where I prioritize clean code, component reusability, and maintainable project structures. I have strong experience working with **dynamic forms, state management (Redux / React Hook Form), and complex data-driven interfaces**. I enjoy solving real-world problems by turning ideas into reliable software that companies can actually use in their daily operations. Beyond coding, I care about **software quality and architecture**, following best practices for componentization, code organization, and performance optimization. I'm also comfortable working across the stack when needed, integrating APIs, handling business logic, and helping transform prototypes into production-ready systems. My goal is always to deliver solutions that are **simple, efficient, and genuinely useful for the people using them.** BurnHavoc BurnHavoc Been around fixing other peoples code for 20 years. 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.

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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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