TempPix is a simple utility that allows you to take quick snapshots and have them stored in a separate, time-limited gallery to avoid littering your main apple photo library with pictures of receipts, shopping items and so on.
TempPix is designed to keep quick, lower resolution snapshots and selfies for up to 21 days before being automatically deleted.
However, if you change your mind you can save the photos to your main library or even share them via iMessage, WhatsApp or other apps.