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 Maybe User A is seeing User B's data, prices are wrong, order statuses are outdated, or the content displayed doesn't match what's actually in the database.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Even if it's "just" wrong numbers or outdated information, it destroys user trust.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
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.
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.
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
ISHANTDEEP SINGH
Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. I’ve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and I’m comfortable building products from scratch as well as improving and scaling existing systems.
Matt Butler
Software Engineer @ AWS
Nam Tran
10 years as fullstack developer
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.
AUXLE
I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies.
Victor Denisov
Developer
Matthew Butler
Systems Development Engineer @ Amazon Web Services
MFox
Full-stack professional senior engineer (15+years). Extensive experience in software development, qa, and IP networking.
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.