We release new versions of the Montr reporting app regularly - sometimes several times a week - which allows us to roll out changes very quickly.
To see which version you are currently running, the app displays a build number. This is useful to know when a new update has just been released, for example to fix a bug, and you want to confirm whether you're already on the latest version.
Landscape mode - the build number is shown in the bottom left of the screen:
Portrait mode - tap the settings button (the three lines) and scroll to the bottom of that page.
The build number is shown in the bottom left:
