The Safari extension is not working

Check these, in this order.

1. You need Pro. The extension works only while your SkipTube account has Pro. Open SkipTube and check your plan. See Free and Pro.
2. Is the extension on? In iPhone Settings, follow the steps: Open Settings, then Apps, then Safari, then Extensions. Turn on SkipTube. Allow it on youtube.com only.
3. Are you on youtube.com? The extension runs only on youtube.com. It does not work on other sites.
4. Close the YouTube tab and open youtube.com again.

After a visit with Pro, the Safari extension screen in SkipTube shows Working in Safari for the next 7 days. If it does not, the extension may be off, or Safari did not use it yet.

The extension uses SkipTube's default settings, not yours. So it can look different from the app.

See Turn on the Safari extension.