Your Xcode project is ready. Follow these steps to install it on your iPhone and publish it to the App Store.
Find the .zip file in your Downloads folder and double-click it. A folder will appear with your project inside.
If you don't have Xcode yet, download it for free from the Mac App Store. It's a large download (~10 GB) so allow some time.
Inside the unzipped folder, find Direktune.xcodeproj and double-click it. Xcode will open.
In the left sidebar, click the blue Direktune project icon → click Direktune under TARGETS → click Signing & Capabilities → under Team, select your Apple ID.
If your Apple ID is not listed, click Add an Account… and sign in.
If Xcode shows an error about the Bundle ID, go to developer.apple.com → Identifiers, click +, select App IDs, enter your Bundle ID (e.g. com.yourname.albumname) and click Register. Then go back to Xcode.
Connect your iPhone, select it from the device dropdown at the top of Xcode, and press the ▶ Play button. The app will install and open on your phone.
Go to appstoreconnect.apple.com → My Apps → + → New App. Fill in the name, language, Bundle ID, and SKU (any unique text). Click Create.
Set the destination to Any iOS Device (arm64) — not a simulator, not your iPhone. Then go to Product → Archive in the menu bar. Wait 1–2 minutes for it to finish.
When the Organizer window opens, click Distribute App → TestFlight & App Store → keep all defaults → Upload. Apple will process the build in 5–15 minutes.
In App Store Connect → TestFlight, add yourself as a tester. You'll receive an email invitation. Open the TestFlight app on your iPhone and install the build.
In App Store Connect, fill in your app's description, screenshots, age rating and pricing. Then click Submit for Review. Apple typically reviews within 1–2 days.