The cost of joining the Apple Developer Program is set at an annual fee of $99 USD, while the Apple Developer Enterprise Program, which is designed for organizations that need to create and distribute proprietary apps internally, has a higher annual fee of $299 USD. It's important to note that these fees may vary based on your geographical location, as Apple often adjusts prices to reflect local currencies during the enrollment process. Therefore, when you sign up, you will see the exact amount in your local currency, which can help you better understand the financial commitment involved. Additionally, being a member of these programs provides access to a range of resources, tools, and support that can be invaluable for developers looking to create and distribute apps on Apple's platforms.