Strange fuel consumption indication

I have a 2013 Prius C for a few months and since I have it I enabled the history chart for consumption, March was 5.6l/100km , April was 5.2l/100Km, May was 4.9/100Km, so lets say an overall 5l/100km.
I got an OBD2 bluetooth reader and Dr Prius app to keep an eye on the battery, on my phone also have Torque Pro app used on my previous car so I did a Prius C profile for it now the strange thing is that the app shows me an overall fuel consumption of 10.9l/100km almost 11l/100km my Ford 3.5L V6 was close to that average.
Did anybody encountered this issue with Torque app? I doubt that the Toyota gauges are not correct but at the same time Torque supposedly pulls the data from the ECU so how come the Toyota dash says 5l average and Torque shows 10.9l?

 

Yes I can...but in the mean time I installed also Hybrid Assistant app and it is almost on par with the Prius calculations ...so I guess Torque pulls either wrong info or out of their rears.