We had all 6 of our new App Store listings rejected under guideline 4.3 since September, while updates to our 20 live apps passed review. Here is what 4.3 says, what we learned, and the check we now run before every submission.

What 4.3 says (Apple's words, read 2026-11-11)

  • 4.3(a): "Don't create multiple Bundle IDs of the same app." Apple's example is a separate map app for every city; it wants one app with variations through in-app purchase.
  • 4.3(b): "Don't submit apps that are indistinguishable from what's already widely available." It names dating, flashlight, sound effects, wallpaper, simple timers and fortune telling as well-established kinds that need "a meaningfully different or improved experience."

The 5-point check

  1. One app, not many bundle IDs.
  2. Search the store for your exact name and core idea before you submit.
  3. If you're in a named crowded category, say plainly what's different.
  4. Compare against your own catalog. Near-copies of your other apps count.
  5. Put the difference in the first lines of your description and subtitle.

The tool

4.3 Radar result for the example listing Focus Timer Pro: High risk, with the reasons and what was compared
Real output for the tool's built-in example listing.

We automated steps 2 and 4 as a free browser tool: 4.3 Radar (https://radar43.pages.dev/). It sends your app name and three keywords to Apple's public search, compares your listing in your browser, and gives a risk level with reasons. Your description isn't sent anywhere. It covers the US store's public search and text only; it can't predict App Review.

Disclosure: we built 4.3 Radar. There's an optional paid review; the check itself is free.