The iOS passcode, along with Face ID or Touch ID, keeps personal information on an iPhone, iPad or iPod touch secure. Rarely the passcode can become an inconvenience, which is why there's an option to switch the passcode off. Temporarily turning off the passcode, or removing it from a device permanently requires entering the existing passcode.
Judging from the number and magnitude of incidents involving Facebook over the past few years, that the social media giant is playing fast and loose with user data is probably an understatement. While it is now putting extra effort into user privacy, it has a long way to go, and you should do everything in your power to protect your data. One of the easiest paths for your private information to leak out is through third-party apps that have permissions to your account.
Many websites and third-party apps will ask for permission to access your Google account for a variety of reasons. They will request different levels of access, ranging from basic profile info used to "sign in with Google" (similar to sign in with Facebook) up to full access to view and edit all data and even create content, which is a scary prospect. It should be obvious by now that you need to take great care regarding your data privacy, so you should know how to see who you've given access to, and how to revoke it if need be. Here's how to do it from your iPhone or iPad:
Unless you have been living in a cave since the early 90s you know that cyber security is a huge issue and that you should protect your data as well as you possibly can. If you are sending private information in documents and spreadsheets over the internet via email, Dropbox, iCloud or any other service, it becomes vulnerable, regardless of how secure you think the medium is. And who knows how the recipient will handle the info?
Restrictions, otherwise known as parental controls, can be set on an iPhone. Content above a certain rating can be blocked and apps such as the Camera can be switched off. The user of the iPhone can be prevented from changing restrictions if they don't know the Restrictions Passcode, a four-digit number entered when first enabling restrictions.
To enable restrictions follow these instructions:
1. Navigate to Settings -> General -> Restrictions.
2. Touch Enable Restrictions and you will be prompted for a four-digit passcode.