Prerequisites:

-Connected to a local WiFi network with your phone/tablet.
-Check the local IP address of the PC you are running War Thunder on.
-In the application settings menu type in your squadron tag and that IP address.

If the numbers don't update at all during a battle (you can even check if it works in any mode), check if you can access 8111 port of this IP on your phone/tablet web browser. For example, if your IP address is 192.168.0.1, type in 192.168.0.1:8111. If you are in the battle and you don't see the gray page with some panels showing game info, application won't work, unless you configure your router/PC/local network.

At the moment the application works only when the War Thunder in-game language is set to English or Polish. If you want to have another language added, check the RegExpCheckers.java file (in Github repository below) for RegExp patterns and create a pull request.

Press the "Reset" button every time you start a battle to reset numbers.

This application may not work correctly if there are players in your team that are in different squadron than yours.

Legality:

Gaijin support didn't answer me at all whether using this application breaches WT EULA but i think there is no way they can detect whether you are using it or not. There are also other applications, like War Thunder's Betty, that also uses JSON data and I'm yet to read that someone got banned because of it. EasyAntiCheat also shouldn't affect it.
But use it at your own risk!


Source code:
https://github.com/gserej/WarThunderSQBHelper