Ah, I hadn't got round to checking Clicksnap. Added to the post. Ta, Leer!

I find clicksnap is far better at getting the money confirmed including when claiming for multiple cashback for one item.

Yes. Always read the terms and conditions in the app. Make sure you check the qualifying merchants - some offers list several merchants that you can purchase the item for to qualify for the cashback claim. For example, with this one, it is only available from ASDA - not ASDA online because Asda.com is not listed. However, for Mountain Dew, you can purchase it from Tesco, Tesco.com, Sainsbury's and Sainsbury's.com.
Purchase the right size, right variant (for example, some items have different flavours), and within the period that the offer is running. Keep the receipt at all costs! Load up the app on your phone/tablet and open up the offer, and then press the 'CLAIM' button, and you will need to take a photo of the receipt (if you have a long receipt, it will let you take multiple photos and stitches them together. Just make sure you do it within the claim period; otherwise the offer will have disappeared from the app along with your opportunity to claim the cashback.
Some items are free - as in Clicksnap (or Clicksnap, for example) - will credit the full price you paid for the item.
Some items have a set amount that you can claim back, for example £1.50 - that might make it half price in one shop, but it could be on offer in another so you get it free (or even make a few pence profit).
Others are just 25p, 50p, 75p etc.
By the way, it's always worth checking the offers between the apps, because the offer might be in two but last for longer on the other. You can't claim the offer using the same receipt in both apps - you would have to purchase two items on two different receipts and upload one to the one app, and the other to the other app.
Some of the apps have a minimum withdrawal amount, for example you have to hit £4 or £5 in claims before you can withdraw it. But the offers are that good that most people check the apps every 1-2 days and claim at least 1-2 things a week. It soon tots up to an amount that makes it worth withdrawing it into your bank account. For Clicksnap, as it's part of Quidco, it just becomes part of your overall Quidco balance so some people prefer it if they're already signed up.
TopCashBack has a 'Grocery' claim section in its app, but generally the offers aren't as good - obviously worth checking if you are signed up with TopCashBack though.
That's probably way too much info but I hope it helps. And it really is very straightforward, despite the mini essay (but I'd rather you know, as you're asking, so you can start claiming and enjoying freebies and the like trouble-free :smile: ).

Hehe, I'll admit to being a little tongue-in-cheek there, but I just KNOW some people will. And I'm not just referring to Star Wars fans. Frozen schmozen remains dear in the heart of many!

'Tis a shame. I don't think all stores are stocking it as the CheckoutSmart app has a section for you to check if your nearest store has it.
If you've another Asda store that you sometimes pass and pop into, it's worth checking the app to see if it is listed there. Obviously not worth it otherwise unless you are or know a big Star Wars or Frozen fan.