Two taps to clock in. A timestamped line lands in the log, and a receipt lands in the employee's inbox. Simple on a good day — solid proof on a bad one.
The screen lists your team. Tap yourself — the clock buttons light up. No passwords, no typing.
One more tap. The server writes a line to the monthly log with the exact time and network address.
The employee gets a copy of their own punch, timestamped by their mail provider. Two records, two places.
Mount an old iPhone by the door as the shared clock, and let staff punch from their own phones too. Each device verifies once; the log notes where every punch came from.
No app store, no accounts, no training meeting. If your team can tap two buttons, they already know Clock Duty. The log is a plain text file you can read forever.