Thanks!

The "offline only" app could be a PWA where you can access if if you're offline but I could even enforce disabling network requests in the code itself. Seems like the most straightforward solution to me. Could even make updates opt-in. Would keep it lightweight and easily accessible for anyone.

What do you think of this? Would you be willing to pay for this, or are certain features you'd be willing to pay for? Curious you're thoughts.