Question: Do you know of an app that gives me cashback or rewards on every purchase and lets me redeem them easily?

If you want an app that will give you cashback or rewards for all your purchases and that makes it easy to redeem them, Karma is a strong contender. Karma is a browser extension and mobile app that automatically applies promo codes and cashback rewards at checkout. It also offers price alerts, product comparison and social sharing. With support for more than 100,000 stores and an average savings of 18% per order, it's a powerful tool to help you get what you want without breaking the bank.

You could also check out SimplyCodes, which offers vetted and validated coupon codes for more than 400,000 online retailers. The service includes a browser extension and mobile app that can alert you to new deals and exclusive offers. You can earn tokens by contributing to the service, redeemable as cash or used to enter "Grab Bags" for a chance to earn more.

If you're looking for a more business-oriented option, Gameball helps businesses keep customers loyal and engaged through personalized loyalty and rewards programs. With options like cashback, VIP tiering and gamification tools, Gameball is designed to keep customers engaged and loyal, so it's worth a look if you're interested in rewards programs from the business side.