Best free EFIS for FlightBox?

EFB Questions / Issues
1

Please provide the following information:

Hardware:
[ x ] FlightBox Kit
[  ] FlightBox Assembled (FB1X)
[  ] Generic Stratux

FlightBox / Stratux version: v1.0r1

FlightBox / Stratux build: 51989F

Radio Configuration:
[ x] Dual Band
[  ] Single Band - US / CA - 978 MHz UAT
[  ] Single Band - International - 1090-ES

GPS Configuration:
[x ] None - Using mobile device's GPS
[  ] Open Flight Solutions Remote GPS
[  ] Internal GPS Module (VK-172)
[  ] Other:

USB Power Source:
[  ] USB Battery: (Make / Model Here)
[x] Cigarette Lighter Adapter: 3 amp

USB Cable:
[x] 3' heavy gauge cable included with FlightBox
[  ] Other: (Make / Model / Description Here)

EFB Application name and version:

Please include a detailed description of your issue or question:

What free EFIS app would work with this AHRS upgrade?

2

On iOS you only have one completely free option, FltPlan Go. On Android you can use either FltPan Go or Avare. Chris Young, the creator of Stratux, has a fork of Avare that’s much easier to use than the original.