Clip-on lenses promise macro, telephoto and dramatic wide-angle photography. Some are useful. Many spend more time in a drawer than on a phone.
Begin with the missing photograph
Do you need to focus closer, fit more of a room or reach a distant subject? If the answer is only “more accessories,” the lens is unlikely to help.
Macro often offers the clearest benefit
A close-up attachment can reveal detail beyond the normal focusing distance. It also creates very shallow depth and needs precise positioning.
Wide attachments trade coverage for clean edges
Cheap wide lenses may soften corners, bend lines and add flare. A built-in ultrawide camera will usually integrate more cleanly.
Telephoto attachments are difficult to align
Alignment errors create dark corners and softness. Long attachments magnify hand movement and rarely replace a genuine telephoto camera.
An accessory that slows the photograph can cancel the phone’s greatest advantage: being ready.
Verdict
Buy only for a named problem. Macro is often the most interesting experiment. Improve light and position before assuming glass is missing.