Time At Work (Free) app for iPhone and iPad

Time at Work is a time keeping app for people who bill their time to clients.
The free version allows one client and one project but multiple tasks. The task list can be maintained via the Tasks option.

Features in the free version include
1. Ability to run a timer and when the app closes it wont run down your battery while still keeping time using the Timer option
2. Enter time against tasks without the timer using the Time Entry option.
3. Allow for a week start day
4. Reports on time for client that can be emailed as PDF using the Reports option