I found this a few days ago through a leaflet I picked up in a shop so they are promoting heavily to get more users.
I am impressed so far so thought it maybe of interest to people on here.
Shopprize is only available as a Android app and is run by the Nielsen panel. You submit pictures of all your receipts and earn 100 coins for every receipt you submit. There is no limit to how many just receipts that are not more than 3 days old. You also earn a daily coin bonus just for logging every day.
Coins can be used to enter Sweepstakes to win prizes. So far I have seen a steam cleaner, slow cooker, hoover and a few other decent items. If you don't win when the Sweepstake ends you have a chance to win coins back through spinning the wheel. I have done a couple of entries and not won but won quite a few coins back.
You can also save your coins up and once you have reached 7500 coins you can convert them into instant win items like Amazon Gift Cards, Google Play Gift Cards, kitchen gadgets etc.
You get 1000 coins when you invite a friend who signs up with you referral code.
I have almost 2000 coins already and only been using it for 3 days so seems really easy to build up the coins quickly.
The app is here:
https://play.google.com/store/apps/details?id=com.shopprize.app&hl=en_GB
My referral code if anyone would like to help me out by using it:
u72ln