BillHawk is a native macOS time tracker and invoicing app built for freelancers and independent professionals. Instead of start/stop timers you have to remember, BillHawk tracks the applications you actually work in. An accepted quote can become a draft invoice automatically. BillHawk never sends anything on your behalf; every draft waits for your explicit confirmation. Local-first by design: all data lives in a single file on your Mac with atomic saves and an automatic rolling backup.