This is super nice and much simpler than all of the other software I've been using to cobble together work logging + time tracking + invoicing this past year. After trying Toggl, Harvest, and everything else I totally understand why you built it.

The only changes I'd like to see are: allowing one to log the time work is started (not just the date), a confirmation before deleting data that can't be recovered, and a way to filter the hours charts by day / week / date range.