Erm, a friend who was level 60 ended up at 42, not 52. Heh.
You can also find your level when you click your face in the upper left-hand corner where it brings down a menu which also includes your iMG to next level too. At least, that's in game.
Allow the app and then go to your profile page on the app. On that page it will tell you exactly how much iMG you have to collect before you hit the next level.
At the moment mine says Will get to level 44 at 5794324 XP (432509 to go).