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For apple: If you’re new to development on Apple Platforms, you can get started with our tools and resources for free. If you’re ready to build more advanced capabilities and distribute your apps on the App Store, enroll in the Apple Developer Program. The cost is 99 USD per membership year.
Android: In order to publish your app on the Google Play Store, it is mandatory to create a Google Developer Account. The registration fee is a one-time payment of $25 .