Freckle has various plans to fit your needs, starting at $12/month. All paid plans include always-on SSL security.
The problem with most time tracking apps is that you need to turn explicitly the timer on and then off and write a comment on what you've been doing. That experience is typically poorly designed and executed, and that's a pain. LetsFreckle sets up the plank for time tracking software; it's made by the guys who've been doing consulting work for other people doing consulting work and freelancing. It's design is clear, experience using it is just fantastic.
Great design and experience. Easy to use. Has chrome / safari extension for easy turning on /off and writing your todos down. Has an iOS and mac apps. Has built in invoicing.
Might seem expensive at first, but it's totally worth it.
Time used: 1-2 years