According to Wikipedia [0], the app was launched 2 and a half years ago. So back in early 2017, machine learning on mobile was just beginning to gain traction. In fact, Core ML was only launched later at WWDC 2017 [1].
Yes it does look fishy. Today we have TensorFlow lite and Core ML, but to me it makes sense they did it this way back then.
I just used it on iOS. It asked for permissions to photos. I said no. But I did give it access to the camera. I can use the share sheet to manually save it.
