In the upcoming videos, we're about to embark on an exciting journey where we'll choose unique identifiers for our iOS and Android apps. It's crucial that every app has its own distinct identifiers, and in the following videos, I'll create my own unique ones. Unfortunately, you won't be able to reuse them.

Before we proceed, please take a moment to check if the identifier you have in mind is available. Otherwise, you won't be able to upload your app. Here's how you can do it:

For Apple, it's simple. Visit your Apple Developer account at https://developer.apple.com/ and go to this link: https://developer.apple.com/account/resources/identifiers/list/bundleId. You can also click on "Identifiers" in your account, then try adding an identifier (App ID) and select "App." Enter the bundle ID you have in mind to see if it's available.

For Android, you can use this website: https://play.google.com/store/apps/details?id=com.donationapp. If the application exists when you open this link, it means the package name "com.donationapp" is taken and you can't use it for your Android app. To check if your desired package name is available, simply replace "com.yournameofchoosinginhere" in the URL with your preferred name. If no app shows up, congratulations! You're free to use that package name.

Once you've found your unique identifiers, make sure to keep them handy and use them whenever I demonstrate changing identifiers in the videos. Now, let's continue with the course and create amazing apps with our distinctive identifiers!