Singapore Calendar is an Android app developed by Agus Haryanto (Perumahan Taman Jatisari Permail Blok CY4-5, Jl. Brantas 4, Jatisari - Jatiasih - Bekasi 17426). Others apps created by Agus Haryanto are: Mexico Calendario, US Calendar.

Singapore Calendar first became available on 19 Feb 2012. It is estimated that Singapore Calendar has been downloaded between 100000 and 500000 times from the Play Store.