Pick the one that suits where you will be
A button camera sits on a shirt front at chest height and points wherever you face, which is the most natural framing indoors. A wrist watch camera reads as an ordinary watch and is the least conspicuous of all, though the angle is lower and harder to control. A cap camera gives you an eye-level view with nothing in your hands, which suits working outdoors.
Recording time matters more on a wearable than on a fixed camera. Battery capacity is limited by the size of the object, so a pen runs shorter than a power bank would. Check the stated recording time against how long you actually need.
Related
Also worn or carried: spy pen cameras and spy camera glasses, each with their own page. For cameras that stay in a room, see hidden cameras. For audio only, see voice recorders, which run far longer than any camera.
Common questions
How long do they record? Typically one to three hours of continuous video, depending on the size of the device.
Will anyone notice the button? It replaces a real button on the shirt front and the lens sits in the centre, so it matches the others on the row.