Hi there! I understand how frustrating it can be when the Weight Watchers app gets stuck, and I'm here to help you resolve that issue. Let’s see if we can get it working again!

First, can you let me know if you’ve tried any troubleshooting steps already? Common fixes include:

1. Restarting the App: Sometimes, simply closing the app and reopening it can resolve minor bugs.

2. Restarting Your iPhone: This can help clear any temporary glitches that might be affecting your app.

3. Updating the App: Ensure you have the latest version of the Weight Watchers app. You can check for updates in the App Store.

4. Reinstalling the App: If the above steps haven’t helped, uninstalling and then reinstalling the app can often fix more stubborn issues. You can do this by tapping and holding the app icon until it shakes, then tapping the 'X' to delete it. After that, you can reinstall it from the App Store.

5. Checking your Internet Connection: Sometimes, a weak internet connection can cause the app to freeze. Make sure you're connected to Wi-Fi or have a good mobile signal.

Please let me know which of these you’ve already tried or if there’s anything specific happening when the app gets stuck, and I’ll help you further!