Why a pen works well
Clipped to a shirt pocket, a pen camera sits at chest height and points wherever you face, close to the natural framing of a body camera without looking like one. Laid on a desk it covers the table in front of you. It is the least conspicuous option in an office, a meeting room or a professional setting, because a pen is expected to be there.
Most models record straight to internal memory with a single button press and no app or pairing. A few add live viewing over WiFi. Recording time is limited by the barrel size, so check the stated runtime against how long you need.
Related
For eye-level footage instead, see spy camera glasses. For audio only with far longer battery life, see voice recorders.
Common questions
Does the pen actually write? Yes, and the ink refill can be replaced.
How do I know it's recording? Most use a small vibration or a discreet indicator rather than an obvious light.