I thought there are two rounded vowels in German as in French 'oui'(u- front rounded?) and 'soeur'(o-like front rounded?). but I find three or more of them and I'm confused...
One is ø : der knödel [ˈknøːdl̩], der Brötchen. One is oe : der Stöckelschuh /ʃtœkl̩ˌʃuː/
and the other one is y : der Schnürsenkel /ˈʃnyːɐ̯ˌsɛŋkl̩/
Are ø and oe alike? and I guess y is the only u-like front vowel in German?