Privacy Policy

• We do not use analytics SDKs of any kind.
• We do not track you across apps or websites.
• We do not require an account, email address, or login.
• We do not upload your photos or send them to any server.
• We do not sell, share, or transmit any personal data to third parties.
• We do not display advertising.
• We do not use the Apple Advertising Identifier (IDFA).
• We do not operate any servers that see your face, your scores, or your activity.

• Smile photos.The selfies you capture are saved to SmileStreak's private storage area on your device. They are never uploaded and are only used to display your history and generate before & after comparisons on-screen.
• Smile Scores & scan history. Each scan's 0–100 score and its component measurements (brightness, evenness, whiteness) are stored locally with Apple's SwiftData framework. Local-only.
• Program & streak progress. Your 30-day plan, completed daily tasks, and current streak are stored on your device. Local-only.
• Goal & onboarding choices. The goal you pick (for example, whiter smile or event prep) and related preferences are stored on your device and used to personalize your plan. Local-only.
• Notification preferences. Your reminder settings are stored on your device. Local-only.
• Purchase entitlement.Whether you have bought the Full Glow-Up Unlock is verified through Apple's StoreKit framework on your device. We never see your payment details.

SmileStreak uses your front camera only while the scan view is open. After your first (baseline) scan, the app locks exposure and white balance so later photos are measured under consistent lighting. Frames are processed in real time by Apple's on-device Vision and Core Image frameworks to detect your smile and compute a score. We do not stream, record, or transmit any camera data.

SmileStreak only writes to your Photos library if you explicitly choose to save or share a before & after card. Share cards are rendered in memory on your device and leave the app only through the standard iOS share sheet, at your direction, to the destination you pick.

SmileStreak has no backend. The app makes no calls to any SmileStreak server, because none exists. The only network interaction is with Apple's own systems — StoreKit for verifying your purchase and the local notification system for reminders. Your photos and scores are never part of any network request.

If you grant notification permission, SmileStreak schedules local reminders to keep your streak alive. These are generated and delivered entirely on your device — no data passes through any third-party push service.

The Full Glow-Up Unlock is a one-time, non-consumable in-app purchase processed by Apple through the App Store. We never see your payment details. Refunds are handled by Apple in accordance with their policy.

SmileStreak is not directed at children under 13 and does not knowingly collect information from anyone under 13.

If this policy materially changes, we will update the “Last updated” date above. Since the app collects nothing and has no servers, material changes are unlikely.

Questions: hello@stackcurious.com