OpenFM is for users looking to find the best FM radio frequency for their favorite DLO FM Transmitter, DLO has launched OpenFM. Available immediately, OpenFM is a free iPhone/iPodTouch application that enables users to instantly find the top-performing FM radio frequencies in their area. Searchable by zipcode or city/state, OpenFM pulls its results in real-time from an active database, not a flat file, thus ensuring the most accurate and up-to-date information available.