You can run a Nostr relay and a Lightning node (with private channels) on your phone. Umbrel is overpriced for what you get and for what you will use it for.
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Sure I can but as for the form factor the ease of use & the power it have its a pretty nice deal overall..
But yeah I also run umbrelOS on another home server and its so simple.. I love it ..
Like the thing is smaller then the last gen apple TV