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One account for the web and the app. Buy Plus here, then sign in on the app with the same email — it unlocks automatically.
No password. We email you a one-tap link.
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as your account
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Open Stack on your phone and sign in with this same email. Any Plus you buy here rides your account — nothing to restore, nothing to re-enter.
Cloud backup is encrypted and opt-in — a convenience backup, not zero-knowledge. See Privacy.