Honestly can’t remember at this point. I also tried both and couldn’t decide back when I was comparing.

I think I started with gotify but struggled getting it working with one of my use cases and ntfy was able.

I don’t know if things have changed so I guess try both and see what best suits you

I personally chose ntfy over gotify and use it everywhere

Flash thingino on a supported camera and you have an open source firmware available with vpn support

Last time this happened to me (read: yesterday) i ended up holding down the power button.

You dont want to shut down when i ask i will make you.

I modded all of my sensors by adding a usb-c port and 5v-3.3v mini converters

Perk is, if done right you can still use battery if needed