Hello LuIggy12,
Thanks for choosing the Apple Support Communities. Apps can be loaded to your Apple Watch using the Apple Watch app on your iPhone. If the app is compatible with the Apple Watch 1st gen, this will help you get the app and resolve the issue.
Download apps on your Apple Watch - Apple Support
How to get apps
Use the iPhone that's paired with the watch, or use the App Store on the watch.
Get apps from the App Store on your Apple Watch
- Press the Digital Crown to see the Home screen, then tap the App Store.
- Tap Search to find apps using Scribble or Dictation or scroll down to discover featured apps and curated app collections.
- Tap an app to see its description, ratings and reviews, screenshots, release notes, and more.
- Tap the price or tap Get.
- When prompted, double-click the side button under the Digital Crown to download and install the app.
In the App Store, if an app has a Get button instead of a price, the app is free. You won't be charged for downloading a free app. Some free apps offer in-app purchases and subscriptions that you can buy. Subscriptions and in-app purchases give you access to more features, content, and more. Learn more about in-app purchases and subscriptions.
Get apps with the iPhone that's paired with the Apple Watch
- On your iPhone, open the Watch app.
- Tap the My Watch tab.
- Scroll to the app that you want to add. Apps that you can install appear in the Available Apps section.
- To add an app to your watch, tap Install."
We hope this helps.
Cheers!