Is APR the same as a interest rates?

Not quite.
It's a figure used to express an, usually monthly, interest rate as an annual figure.
APR stands for Annual Percentage Rate (of interest). It tells you exactly what interest rate will be used to add to your savings each year, despite other figures which may be quoted in adverts, whether in the press, on the TV or Radio, or in leaflets from the building society or bank.
The government watchdog insists on this so that you know more exactly what you owe or what you have to pay.