[iainmerrick]

That's not great, but it seems like the information is actually there, just not exposed very well.

The ratings are very broadly 80% 5-star and 20% 1-star, so technically 4.2 is right. It's just that it's massively bimodal rather than mostly 4-star reviews as you might expect (which you can see if you look at the histogram) and that recent reviews are overwhelmingly bad (which you can't directly see, but those new 1-star reviews seem to be the featured ones).

Right now the app developer chooses with each new release whether to keep existing ratings or restart from scratch. It would be better if the users get to decide (i.e. actually see the chart of ratings over time) and/or it's automated somehow (e.g. if there's a big step change in the latest release, that gets detected and highlighted automatically).