
If the app you want isn’t available in the Russian App Store, you don’t have to change your primary Apple ID. A more convenient way is to create a second account with a different region and use it exclusively for the App Store. Your iCloud, photos, contacts, backups, and subscriptions on your main account will remain unchanged. Apple officially supports using one Apple ID for iCloud and another for purchases and app downloads.
It’s important to remember that if you plan to make a purchase, you’ll need a credit card issued in that region. However, if you only plan to download free apps, you don’t need to provide a payment method.
You don’t need to change your primary Apple ID.

Your main iCloud account will remain active: photos, messages, backups, FaceTime, iMessage, and Find My will continue to work through it. The only thing that changes is the account used to download apps and make purchases in the App Store.
No. After installing an app, you can sign back into the App Store with your primary Apple ID. The app you’ve already downloaded will continue to work. If an update is released in the future, you may need to sign in again with the Apple ID you used to install the app.
Using a second account exclusively for the App Store does not affect the data in your primary profile. Your photos, contacts, iCloud Drive, backups, messages, FaceTime, and subscriptions associated with your primary Apple ID will remain unchanged. The only thing that changes is the account used to download and update apps.