You Didn't Know Existed
Guided Access -
Limit your iPhone to a single app and disable certain features with Guided Access.
Shake to undo -
Shake your iPhone to undo the last action you took, like typing or deleting text.
Scan QR codes -
Use the default Camera app to scan QR codes without needing a third-party app.
Medical ID -
In the Health app, set up a Medical ID that can be accessed from the Lock screen in case of an emergency.
One-handed keyboard -
In the Keyboard settings, enable the one-handed keyboard for easier typing on larger iPhones.
Hidden trackpad -
On iPhones with 3D Touch, press and hold the keyboard to turn it into a trackpad for precise cursor control.
Battery usage by app -
In the Battery settings, see which apps are using the most battery and adjust your usage accordingly.
Bedtime mode -
In the Clock app, enable Bedtime mode to get reminders to go to bed and wake up, and to track your sleep.
Siri shortcuts -
Use the Shortcuts app to create custom voice commands that automate tasks, like sending a message or starting a workout.
Emergency SOS -
Press and hold the Side button and either volume button to quickly call emergency services and notify your emergency contacts.