I downloaded this app to track numerous clients/hours as a nanny. Unfortunately if you want to record more than two clients you need to upgrade (I believe it was about $10). Totally worth it though. I love the ease of recording, and being able to invoice people by simply clicking dates makes things so much easier. The only complaint I have is that the app for phone isnt quite as user friendly as the app for iPad (though I do use both). You are unable to see your time sheet (so no full month calendar view) on your phone. This is not a deal breaker!
ACURR19 about Hours Keeper: Time Tracker, v3.4.1