I've been happily using your service for years now, and have one tiny suggestion I feel would make a huge difference on the android platform.
The quick settings tile, that quickly toggles the VPN connection on/off on android devices, when long pressed, opens the app info screen (usage, storage, notification, etc. android app details)
I've found myself long-pressing the tile many times to open the app from any screen quickly, which I'm soon reminded doesn't do that. I feel this would be a small but valuable tweak to the client.