MEEFF is an Android app developed by AD(x) Inc. (11th floor, 508, Eonju-ro, Gangnam-gu, Seoul, Republic of Korea). Others apps created by AD(x) Inc. are: Subway, AlarmMon, Mydol, 1km, Once.

It is estimated that MEEFF has been downloaded between 5000000 and 10000000 times from the Play Store.