No Compass?

[Skaughtto]

I couldn't download Nokia City Lens... "This app is not available because it requires: compass"

 

[LYZ1999]

The Lumia 521 and 520 have no compass/magnometer in the device, which means that City Lens won't be able to run on the 521 or 520

 

[fwaits]

Looks like the 521 doesn't have a compass (Magnetometer) from the spec sheet.

Sensors: Ambient light sensor, Accelerometer, Proximity sensor

Nokia Lumia 521 - Specifications - Nokia - USA

I'm sure they had to make cuts in various areas to get that low cost.