You've noticed we cover system app updates regularly here with manufacturers releasing updates that alter specific features on a particular Windows Phone. It can be difficult to keep up with the number of system apps Nokia updates with its Lumia family of products. Cue LUMIA pusher, which will enable you to check to see if you have the latest versions.
The likes of Nokia account, accessories and feedback to Nokia aren't listed on the Windows Phone Store (without a deep link). This app solves that issue by bundling all of them together in an accessible list with more convenient access to the store. Selecting each entry will take the user to the store and checks can be performed to see if an update is available. Alternatively, you can always check our feed and use our QR codes, etc.
So which Lumia Windows Phones are supported? If you own a Lumia 520, 620, 720, 820 or 920 you're in luck. You can download LUMIA pusher for free from the Windows Phone Store. Thanks, Giovanni, for the tip!