APK may refer to: Science Adenylyl-sulfate kinase Amplitude and phase-shift keying Android application package file format apk-tools, the package manager of Alpine Linux Aspartokinase, especially lysC Other uses Afrikaanse Protestantse Kerk, Calvinist church in South Africa Algemene Periodieke Keuring, the vehicle inspection procedure in the Netherlands Alliance Party of Kenya, a political party established in 2012 Apopka High School, Florida Arbetarpartiet Kommunisterna, the Swedish name for the Communist Party of Sweden (1995) Arbejderpartiet Kommunisterne, the Danish name for the Workers' Communist Party (Denmark) Air Peace (ICAO airline code)