A match-making system allows users possessing mobile communications devices such as cell phones and/or PDAs to be alerted to the proximity of other users that may be a romantic, professional or other “match” to the user of interest based on a comparison of profile properties. The system may operate via a near-field radio-frequency system such as Bluetooth or a cellular or other relatively far-field wireless system, or a combination of the two in a complimentary manner. The disclosed system also allows a connection between the users to be made if desired by both users, and otherwise allows one or the other user to decline a connection. Matching by the system may be used for social or business purposes.