Common Issues
data
My App Is Showing Wrong Data to Users
Your app is showing users the wrong information. Maybe User A is seeing User B's data, prices are wrong, order statuses are outdated, or the content displayed doesn't match what's actually in the database. This is confusing at best and a serious privacy violation at worst.
If one user can see another user's personal information, orders, or account details, you have a critical security and legal problem on top of a technical one. This needs to be fixed immediately.
Even if it's "just" wrong numbers or outdated information, it destroys user trust. People won't use an app they can't trust to show them accurate information, especially when money is involved.
Error Messages You Might See
No error message — just incorrect data displayed
Users reporting seeing other people's information
Prices don't match what was advertised
Order status stuck on old value
Dashboard numbers don't add up
Common Causes
- No data filtering by user — The app loads all data from the database instead of only the current user's data
- Caching showing stale data — The app saved an old version of the data and keeps showing it instead of fetching fresh data
- Data loaded in wrong order — The page displays before the data finishes loading, showing old or default values
- Database queries missing filters — The code that fetches data doesn't include a WHERE clause to filter by the current user
- Timezone or currency conversion errors — Dates, times, or prices are being converted incorrectly for different regions
How to Fix It
- Check if users can see each other's data — Log in as two different test users and verify each one only sees their own data. This is your highest priority
- Clear all caches — If your app caches data, clear the cache and see if the correct data appears
- Check the database directly — Open your database and verify that the actual stored data is correct. The problem might be in the display, not the data itself
- Add Row Level Security — If using Supabase, enable RLS policies so the database itself prevents users from accessing other users' data
- Test with fresh data — Create a brand new test account and add fresh data to see if it displays correctly
Real developers can help you.
Sage Fulcher
Hey I'm Sage! Im a Boston area software engineer who grew up in South Florida. Ive worked at a ton of cool places like a telehealth kidney care startup that took part in a billion dollar merger (Cricket health/Interwell health), a boutique design agency where I got to work on a ton of exciting startups including a photography education app, a collegiate Esports league and more (Philosophie), a data analytics as a service startup in Cambridge (MA) as well as at Phillips and MIT Lincoln Lab where I designed and developed novel network security visualizations and analytics. I've been writing code and furiously devoted to using computers to make people’s lives easier for about 17 years. My degree is in making computers make pretty lights and sounds. Outside of work I love hip hop, the Celtics, professional wrestling, magic the gathering, photography, drumming, and guitars (both making and playing them)
legrab
I'll fill this later
Richard McSorley
Full-Stack Software Engineer with 8+ years building high-performance applications for enterprise clients. Shipped production systems at Walmart (4,000+ stores), Cigna (20M+ users), and Arkansas Blue Cross. 5 patents in retail/supply chain tech. Currently focused on AI integrations, automation tools, and TypeScript-first architectures.
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.**
Nam Tran
10 years as fullstack developer
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
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.
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.
Pratik
SWE with 15+ years of experience building and maintaining web apps and extensive BE infrastructure
Antriksh Narang
5 years+ Experienced Dev (Specially in Web Development), can help in python, javascript, react, next.js and full stack web dev technologies.
Describe what's wrong in plain English. No technical knowledge needed.
Get HelpFrequently Asked Questions
Is it illegal if users can see each other's data?
Yes, this is likely a violation of privacy laws like GDPR (Europe), CCPA (California), or other regional data protection regulations. If personal data was exposed, you may be required to notify affected users and potentially regulators. Fix this immediately.
My data looks correct in the database but wrong in the app. Why?
This means the problem is in how your app reads or displays the data, not in the data itself. Common causes include caching, timezone conversion, wrong database queries, or the app showing data before it finishes loading.