Persistent app settings (UserDefaults on iOS, SharedPreferences on Android).

Examples

# Get a setting value
Dala.Settings.get("theme")

# Set a setting value
socket = Dala.Settings.set(socket, "theme", "dark")

# Watch a key for changes (messages arrive via handle_info)
socket = Dala.Settings.watch(socket, "theme")

Incoming change messages are delivered to screens via handle_info/2:

def handle_info({:settings, :changed, {key, value}}, socket) do
  # React to setting change
  {:noreply, socket}
end