Calendar integration covers most of my needs. The tags are great for keeping an eye on where time is going on as needed. Haven't use the app or url tracking, but it could come in handy when my calendar doesn't cover anything.
Time tracking tools used to be rather annoying for me because I couldn't use them flexibly from different devices and with just one click. Timeular really helps here! It´s very convenient because it doesn't really take me any extra time to record my time quotas.