Quick-launch calculator:
Maybe you just need to make a super quick calculation but don’t want to open the calculator app.
Just swipe from left to right of the home screen till your get to the Search bar. Type in the operation you want to perform and you’ll get the answer in a jiffy.
Your iPhone has a scientific calculator:
Make sure to have screen rotate enabled if you want to access the built-in scientific calculator on the iPhone.
Then launch the calculator and turn your device to the side in the landscape orientation. This will bring up the scientific calculator.
Set shorter or longer passcode:
Depending on which model of the iPhone is in your possession, you may unlock the device via Face ID or a passcode. Not everyone is comfortable with biometric sensors yet.
Apart from privacy worries, people may have other personal reasons to avoid using Face ID to unlock their Apple handset.
It could even be that the 3D sensor for facial recognition stopped working and you don’t want to waste money on repairing it.
Did you know that you can set up a shorter or longer passcode and even choose to make it a mix of letters and numbers?
To change or set up your passcode, head over to Settings > Face ID & Passcode > (Enter your current passcode if any) > Change Passcode > (Enter current passcode if any) and tap on Passcode Options.
You can pick from a four-digit or customer numeric code or an alphanumeric code.
The last one enables you to set a strong and secure combination of letters, numbers and special characters as your password.