No APR. It is just a way to protect your account from being stolen instantly, in case someone manages to get your keys.
With the savings acccount, even a hacker has to wait 3 days to get access to your funds, and if you log in in the meantime you can notice the activity and change your keys.
So Hive Power has an APR but the Savings account doesn't?
Yes
What is the point of that? Wouldn't it be better to just keep funds in Hive Power then?
Yes, but if you want to sell your hive power you have to power down and wait 13 weeks to get the full amount.
Keepong it liquid instead is subject to theft if a havker gets your keys.
The savings account is a compromise which doesn't allow a hacker to cash out instantly and instead locks the funds for three days so that you have time to notice the problem and change your keys.