Print A Build Number to the Screen? iOS

I’d like to create a build number, increment it every time I build for iOS, and display a build number on the screen. I’d just like this for testing/bug tracking. Does anyone have any insight on the best way to go about doing this? Am I better off trying to display something else on the screen, like the bundle ID or something? Any help would be appreciated. Thanks!

(This would just be fore debug, not in the final build.)

Sorry for responding to such an old thread, but anyone who finds this might be interested in my Procedural Asset Framework (Unity Asset Store - The Best Assets for Game Making). It has an AppDetails script which gives you automatic build numbering (as an int), as well as a build time stamp (as a DateTime). It also gives you runtime access to the product name and company name you specify in the player settings.