Apple Watch App Not Working!?

Hello splxshs,

Thanks for posting in the Apple Support Communities.

Have you confirmed that you're up-to-date with the latest iOS version on your iPhone? If you're unsure, check out the steps below for assistance with updating and backing up your iPhone. You can also locate this information here: Update your iPhone, iPad, or iPod touch - Apple Support

Update your iPhone, iPad, or iPod touch wirelessly

1. Back up your device using iCloud or your computer.

2. Plug your device into power and connect to the internet with Wi-Fi.

3. Go to Settings > General, then tap Software Update.

4. If you see two software update options available, choose the one that you want to install.

5. Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do.

You might see that your device is up to date and that there's an upgrade available. For example, even if your device is up to date with the latest version of iOS 14, there might be an option to upgrade to iOS 15. You might want to upgrade iOS when you pair an accessory with iPhone.

If you're up-to-date, confirm you're using the same steps as shown via the following resource. In addition, we'll include a video that walks through the process: Set up and pair your Apple Watch with iPhone - Apple Support

We hope that helps.

Have a great day!