Not the best

I use several of these "savings apps" and this one is the worst. Yes, you will still get money eventually, which is why I continue to use this app, but it is extremely slow going, and much smaller amounts, compared with other similar apps. Also, their "spins to win" are really annoying and I really dont think they give me as many as they say theyre going to, but I dont have the time to keep track of it all.
The worst part is the surveys. Today I got a survey that said I would get 30 points for taking it. So I go to take the survey and its asking me about a receipt from 2 weeks ago! I dont remember what I bought 2 weeks ago, so I hit the back button to go look at what I purchased and surprise! Now I dont qualify to take the survey at all. Why dont they put a warning that you cant back out once you start a survey without disqualifying yourself? So annoying.
One more complaint- they want full access to your emails to get credit for your e-receipts! No thank you. This may be why my earnings are so slow but Im already providing them with a great deal of personal information here, and I dont think its appropriate for an app like this to require access to email. Another app I use only requires you to forward the actual e-receipt to their designated email address. This app wants to go through each individual email and pick out the e-receipts for you!

But all complaints aside, its still free money so I would recommend the app, but I would caution anyone about the email situation before they sign up.

ishnaps about Receipt Hog: Shopping Rewards, v3.1.1