Thanks for your feedback.
When we originally launched the Today widget in September 2014, it was centered in the device screen. However, that did align to Apple's guidelines for Today widgets. If you'd like more detailed information, I encourage you to check out Apple's iOS Human Interface Guidelines : App Extensions. Without risking our app being rejected, we're limited to the "Widget content area" which is left-bounded by the Title of the widget.
I hope this helps.
Thx for your reply! Yes, I know the guidelines and (of course) you did well. But seems like only you! LOL
This is my today widget (not only mine, I guess), which I recommend to take a look:
If I were you, center the widget and cutting well under the rounded icons.
Just to know, maybe you used a Symbian... this was me (Giambi Themes 3rd)
By the way, thanks for all!