Chastity and orgasm denial discussion

I’ve scoured through the threads and read every relevant post I could find, but nothing quite hits the spot. I’ve come across messaging apps that offer delayed opening for messages or media. Others allow you to encrypt photos so prying eyes can’t see them, yet they lack a time-based mechanism. Does anyone know of an app that simply encrypts a photo with a timer attached to unlock it? Since this isn’t strictly focused on sexuality, it should be able to pass the iTunes review process. I recall seeing one recently priced around $9 or so, but I’ve lost track of where to find it again. Has anyone discovered something that lets you lock down a photo and set a specific timer for when it becomes viewable?