Many people encounter confusion between these two terms when studying crypto products. Let's clarify what the abbreviations stand for and why they are truly important for your profits.

Let's start with a more straightforward concept. The annual percentage rate (APR) is simply a fixed rate that you earn or pay over the course of a year. Imagine depositing $10,000 into an account with an APR of 20%. After one year, you'll have earned 2000%, which means $2,000. After two years, 4000%, or $4,000. It's all simple and linear.

But here’s an interesting point—the effect of compound interest. This is when your interest starts earning its own interest. Sounds strange? Actually, it’s the magic of financial mathematics.

Imagine the same situation, but the bank compounds interest monthly. Then, each month, interest is added to your principal, and the next month you earn interest on the increased amount. The effect accumulates. Instead of $12,000 at the end of the year, you’ll have $12,429. The $429 difference appears solely because of frequent compounding.

What if interest is compounded daily? Then, the total would be $12,452. Over three years, with daily compounding at the same 20% rate, you’d end up with $19,309 instead of $16,000 without compounding. That’s an additional $3,309 in earnings!

This is exactly what APY is—annual percentage yield, which accounts for the effect of compounding interest. With a 20% APR and monthly compounding, the APY is 21.94%. With daily compounding, it’s 22.13%. See the difference?

When you look at crypto products like staking or savings, always check whether they specify APY or APR. This drastically affects your actual income. A product with a higher APR doesn’t necessarily generate more profit than one with a lower APY if they have different compounding frequencies.

An important point: when comparing two DeFi products, make sure both accrue interest over the same period. If one compounds monthly and the other daily, even with the same base rate, the results will differ significantly in favor of daily compounding.

Another nuance often overlooked: in crypto products, APY can mean rewards paid directly in cryptocurrency, not in fiat money. This is important because the asset’s price can drop. You might earn a good percentage in tokens, but if the token’s value decreases, your total investment (in dollars) could be less than your initial amount. This is a real risk to consider.

The main rule is simple: always check what calculations are used for your returns. APY is a more complex indicator than APR, and it better reflects actual earnings when interest is compounded frequently. If interest is compounded more than once a year, APY will always be higher than APR.

Before choosing a product, carefully review the terms. The difference can be significant, especially over long investment periods. And remember: crypto yields carry volatility risk, so always do your own research and understand what you’re counting on.