If you don't want the randomize on you have to go to system prefs (settings) and scroll down the apps to Hipstamatic and tap on it.
You should get:
View attachment 61404
As you see there is a toggle for the Randomize.
Here you can also disable the auto-save to Cameraroll if you don't want it. Photos are always in-app and can be used there for setting the lens, film and flash.
The prescision viewfinder means that it is more accurate for showing the image. If it's turned off it is a bit less accurate sometimes, that also seems to be randomized to some degree.
In Hipstamatic app you can double tap on the preview and it will enlarge to fit the device, and once enlarged tapping anywhere will take a picture, but this does help especially for close focusing.
The save setting will let you have all the images put into an album which I like.
Shutter can also be used with the volume switch instead of the screen.
Once you find combos you like you can create a favourite and this is where I use different cases. For landscape I use their green case (if you get the CasePak in the store) red for sunsets etc.
Getting back to images in Hipstamatic if you tap on an image it shows what lens, film, flash were used if you tap on the text you are given the option of matching, ie if you match it sets everything for you, or you can make a favourite from it (if it is already a favourite it will let you delete it. If you do have favourites if you tap the star and again long press on the name you can delete it or rename it if you like.