This alternative store allows you to install misc apps.

Add it to your Umbrel

1. Open the App Store, click the button with three dots next to the search box, then Community App Stores. On umbrelOS 2.0, once you have added a community store, that menu has Manage under it: choose that.
2. Paste https://github.com/Horizon-btc/Bitcoin-store and click Add.
3. Click Open next to Misc. The search box on the main App Store page does not search community stores, so find the apps on the Misc page.

If you added this store before as https://github.com/Retropex/Bitcoin-store (with or without .git), you already have it: that is the same store. Do not add it a second time. On umbrelOS 2.0 a store added under both addresses blocks installs and updates of its apps, and Install shows "This app ID conflicts with another app store." Remove one of the two entries under Community App Stores, then Manage, to fix it.