Your repertoire, everywhere.

Browsers can automatically clear local storage when your device needs space—and this can happen without warning. With Pro, your repertoire is safely backed up to the cloud. If anything happens to your local data, just sign in and it's restored instantly.

Your data stays safe in the cloud for 30 days. You can keep using OpeningNinja offline with all your local data, and re-subscribe anytime to restore sync.

Absolutely. OpeningNinja is offline-first—everything works without internet. Pro adds cloud sync so your data follows you across devices when you're online.

Yes. No contracts, no commitments. Cancel from your account settings and you'll keep access until your billing period ends.