The latest articles on DEV Community by Ahmed J. (Wardin Studio) (@wardin_support_a4df49ed25). https://dev.to/wardin_support_a4df49ed25 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4239888%2F8b906cd9-0cda-4269-b68e-b81be2ee29af.png https://dev.to/wardin_support_a4df49ed25 en Ahmed J. (Wardin Studio) Wed, 11 Nov 2026 21:30:03 +0000 https://dev.to/wardin_support_a4df49ed25/i-built-a-free-warranty-tracker-alone-from-tunisia-with-expo-and-supabase-1b3k https://dev.to/wardin_support_a4df49ed25/i-built-a-free-warranty-tracker-alone-from-tunisia-with-expo-and-supabase-1b3k <p>Hi DEV. I'm a solo developer from Tunisia, and this is my first post here.</p> <p>I kept losing receipts and forgetting when warranties ended. When something broke, I never knew if it was still covered. So I built <strong>Wardin</strong>, a free warranty tracker.</p> <p><strong>Try it in the browser, no account needed:</strong> <a href="https://warranty-9ze.pages.dev" rel="noopener noreferrer">https://warranty-9ze.pages.dev</a><br> (It opens with sample products so you can see how it works. There's also an Android app.)</p> <h2> What it does </h2> <ul> <li>Take a photo of a receipt and it fills in the product, store, date and price</li> <li>Shows how much warranty time is left on everything you own</li> <li>Reminds you before a warranty ends</li> <li>Helps you write a claim when something breaks</li> </ul> <h2> The stack </h2> <ul> <li> <strong>Expo + Expo Router</strong> for Android and the web from one codebase</li> <li> <strong>Supabase</strong> for accounts, sync and file storage</li> <li> <strong>An AI model behind a Supabase Edge Function</strong> to read receipts, with a daily limit per user so it stays free</li> <li> <strong>EAS Build</strong> for the Android APK, <strong>Cloudflare Pages</strong> for the web version</li> </ul> <h2> Three things I learned </h2> <p><strong>1. Let people try it before asking them to sign up.</strong><br> The first version started on a login screen and almost nobody went further. Now guests get sample products right away, and an account is only needed to sync between devices.</p> <p><strong>2. Save locally first, sync later.</strong><br> Everything is saved on the phone first and uploaded when there's a connection. One bug I had to fix: if a photo failed to upload, the app still marked it as uploaded, so it was missing on other devices. Now a photo is only marked as uploaded when the upload really worked.</p> <p><strong>3. Small details matter for users outside the US.</strong><br> New users in Tunisia were seeing prices in dollars. Now the app picks the currency from the phone's region.</p> <h2> Getting users with no budget </h2> <p>I have no marketing budget, so I make a daily animated Shorts series called "Sam vs. Warranties" about a guy who keeps losing to warranties. One episode got 1,100 views and most got under 50. The lesson so far: the first two seconds decide almost everything.</p> <h2> I'd love your feedback </h2> <ol> <li>Would you use something like this, or is a folder of receipts enough?</li> <li>What breaks or confuses you when you try it?</li> <li>How would you find the first 100 users with zero budget?</li> </ol> <p>I'll answer every comment. Thanks for reading!</p> <p><em>I wrote this post with help from an AI assistant.</em></p> showdev reactnative expo supabase