I tried five cash back apps over two years, and the honest answer is that most of them pay out, but not the way the ads make it sound. I have cashed out real money from three of them, and I dropped the other two. Here is what actually happened.

Cash back apps work, but the returns are small, and the fine print decides everything.

The ones I kept

• Rakuten. The classic. It pays a percentage back at hundreds of stores, and it sends a real check or PayPal payment every quarter. I have received several payments. The returns are small, 1 to 4 percent, but they are real.
• Ibotta. It pays for buying specific items and scanning receipts. It takes more effort, but the payouts are real, and it works at grocery stores where nothing else does.
• One store-specific app for a store I shop at weekly. Those often pay the best because the store controls the program.

The ones I dropped

Two apps promised big bonuses and never delivered, or set a cash out minimum so high it was basically a joke. Always check the payout threshold before you start. If the minimum is over twenty dollars, ask yourself how long that will take.

What I learned

1. Use it as a habit, not a plan. The money is real but modest. It is a discount, not income.
2. Never buy something just for the cash back. A 4 percent rebate on something you did not need is still a loss.
3. Stack with sales and coupons. Cash back on top of a sale is where the value is.
4. Keep an eye on expiry. Some apps expire points, and nothing is sadder than losing a payout to a deadline.

How I use them now

I check the app before ordering online, and I scan receipts for grocery items I was buying anyway. It takes two minutes a week and adds up to a small but real amount each quarter. I treat it like a coupon pile, not a bank account.

The apps do not make you rich. They make your regular shopping a little cheaper, and that is worth the two minutes.