The current average USERindex scores are based on results from 167 studies and 4108 participants across internet sites and mobile apps, collected from 2014 through 2016.
The current (2016) average USERindex is 4.12. The 2015 average was 4.07.
Some other averages:
2015 average USERindex is 4.07
The average USERindex measured in 58 studies and 1521 participants across internet sites and mobile apps in 2015 was 4.07.
On desktops, the average USERindex measured was 4.03, for native apps it was 4.07 and for mobile websites it was 4.14.
For the retail industry, the average USERindex was measured at 4.29 and for the Entertainment, Lifestyle industry it was 4.04.
Correlation between USERindex and NPS
In the studies where we asked for both the USERindex as well as the NPS, we could establish a positive correlation of between 0,274837 and 0.55606457 depending on how the data is sliced.