Assuming Android? Had a similar issue with different apps. Turned out to be something called "Mobile Services" doing this. Some ads also used it to sideload apps. Found an article about this class of software and it's apparently common on phones. Key was to look at the package names (I used the Package Names app). In my case, com.dti.tracfone. disabled THAT app and no more problem.
Assuming Android? Had a similar issue with different apps. Turned out to be something called "Mobile Services" doing this. Some ads also used it to sideload apps. Found an article about this class of software and it's apparently common on phones. Key was to look at the package names (I used the Package Names app). In my case, com.dti.tracfone. disabled THAT app and no more problem.
Reference: http://telstramobileloop.com/what-is-mobile-services-manager/