If the app is showing time in military (24-hour) format, you can switch to the standard 12-hour clock by adjusting your iPhone’s Date & Time settings.
Step 1: Turn off 24-Hour Time
Open Settings.
Go to General → Date & Time.
Turn off 24-Hour Time.
This switches your iPhone from military (24-hour) time to the standard 12-hour clock with AM/PM.
Step 2: If 24-Hour Time toggle doesn’t fix it
If the app still shows military time after turning off 24-Hour Time, try these additional steps:
Go to Settings → General → Language & Region and confirm your Region matches your country.
In Settings → General → Date & Time, make sure 24-Hour Time is off and Set Automatically is on.
Go to Settings → Privacy & Security → Location Services → System Services and turn on Setting Time Zone.
Restart your iPhone after making these changes to help the settings apply properly.
Following these steps should set the standard 12-hour AM/PM clock in the app.