Software programs or applications that run on any computer or mobile device (such as a smartphone or tablet) are frequently described as apps.
In APA 7th edition, it states that software applications and mobile apps are mentioned in the body of the text and do not need to be referenced if they are commonly known. Simply provide the proper name of the software with the version in a sentence, e.g. Microsoft Word 2013.
However, in-text citations and references are needed if there are any quotations or paraphrases from an app or if referring to an app that readers might not know.
Reference list
Author, A. A., & Author, B. B. (2020). Title of work (Version 1.2) [Mobile app]. Publisher Name or App Store. https://xxxxx