I’m going to dive into spousal and survivor benefit calculators first, because I think this is one of the key tools that’s perhaps the most under-utilized out there.

These three calculators can be very helpful in your quest to find the best loan.

Alternatively, press the "Ctrl" + "H" keys simultaneously to enable history tracking. Use the calculator in the customary manner, typing in numbers and expressions on your computer's numeric keypad.

Unlock the full potential of your iPad calculator app with our beginner's guide on how to use math notes on iPad. See how it can automatically calculate math equations and show results as you write.

Read more: Everything You Need to Know About iOS 18 Here's how to use your Calculator app to perform conversions fast.