How to Check Code Uniqueness Before Submitting to the App Store
The 4.3 Rejection Nobody Sees Coming
You've built two apps. They solve different problems, have different UIs, target different audiences. You submit them both to the App Store with confidence.
Then Apple rejects the second one with rule 4.3: "Duplicate Functionality." The review team flagged structural code similarity you didn't know existed.
Here's the catch: Apple's review system compares your apps automatically. But you can't see what it sees. There's no preview mode in App Store Connect. No "structural similarity score" before you hit submit. You find out only after rejection—and that costs you another 1-3 day review cycle while you figure out what to change.
Why This Happens
App Store rule 4.3 doesn't care about visual design or user experience. It cares about code structure: navigation patterns, shared modules, architecture decisions, even naming conventions.
Two apps can look completely different but fail this check because they:
- Share the same routing logic
- Reuse authentication flows from a shared codebase
- Have similar state management patterns
- Copy utility functions without enough variation
The frustration isn't that the rule exists—it's that you're flying blind. By the time you get feedback, you've already waited days, and now you need to make structural changes and resubmit.
The Solution: Scan Before You Submit
This is exactly why we built apporig.com.
Upload your projects or connect your Git repository. apporig scans your code and compares structural similarity across your apps. You get results back in minutes—not days.
The output is straightforward:
- COPY: High structural similarity (likely to trigger 4.3)
- RELATED: Moderate similarity (worth reviewing)
- OK: Safe to submit
Each finding includes:
- Exact percentage of similarity per layer (files, modules, navigation)
- Specific files and patterns flagged
- Which parts of your code are too similar
What apporig Actually Checks
apporig understands code at a structural level, not just line-by-line matching. It analyzes:
- Navigation architecture: How screens/views connect
- Module organization: Shared components and their patterns
- State management: Redux, Provider, MobX, etc.
- Authentication flows: Login, token handling, session logic
- Utility patterns: Helper functions, shared logic
It works with:
- Swift & Objective-C
- Kotlin & Java
- React Native
- Flutter
- Web frameworks (bonus)
Practical Workflow
Here's how it fits into your submission process:
- You've finished two apps and they're ready for submission
- Go to apporig.com, upload both projects (or connect Git)
- Get a report in 5-10 minutes showing structural overlap
- If there are COPY or RELATED flags, refactor those sections before submitting
- Submit with confidence—you've already passed the check Apple performs
No guessing. No rejected submissions. No wasted review cycles.
Real Cost Avoidance
Let's be specific about what rejection costs:
- 1-3 days waiting for review feedback
- 2-4 hours debugging what "too similar" actually means
- Structural refactoring (4-8 hours if it's a real problem)
- Another 1-3 day review cycle
- Total: 3-6 days and 6-12 hours of dev time
Running apporig before submission takes 10 minutes and catches this problem upfront.
Getting Started
We want developers to actually use this before hitting rejections.
First 20 users get the Starter plan free for 3 months. No credit card required. Just sign up at apporig.com, upload your code, and see what Apple would see.
If you're managing multiple apps, or if you've been hit with a 4.3 rejection before, this is exactly what you need.
Stop losing days to App Store rejections. Check your code uniqueness before Apple does.
Top comments (0)