Privacy & your data

This explains how the current Smart Slim app handles your information. Updated September 26, 2026.

What you save

Your plan contains starting and target weights, dates, duration, daily weigh-ins, and preferences. The website saves this in this browser. The iPhone app saves it on the device. Anyone with access to your browser profile or unlocked device may be able to see it.

Accounts and cloud copies

If you sign in with Apple or Google, Firebase handles authentication and the app can sync your plan, weigh-ins, and preferences to your account in Firestore. Your account name and email may be displayed; the website may also show your Google profile photo. Signing out keeps the device copy and does not delete cloud data. Switching accounts keeps separate local copies so one account’s plan is not sent to another account.

External connections

The website loads fonts from Google Fonts and account libraries from Google. Those requests send network information such as your IP address to those providers. Hosting providers may also keep request logs. The coaching and protein calculations run locally; this version does not send them to an AI service.

Export and delete

Open Settings → Export your data to save a JSON copy of your plan, weigh-ins, and preferences. Exports contain personal weight data: store and share them carefully. The app does not currently import exported files.

Settings → Delete device data clears the app's saved plans, weigh-ins, preferences, and local account copies on the current device or browser. Sign out first if you are signed in. On iPhone it also cancels coach reminders. This action cannot be undone in the app. It does not delete cloud copies, data on other devices, system backups, or downloaded exports. Signing in again can restore synced data.

In the iPhone app, Settings → Account → Delete account asks you to verify your identity, then permanently removes your Firebase sign-in account and cloud plan, including weigh-ins and preferences. For Apple accounts it also revokes the Apple sign-in authorization. If interrupted, sync pauses and you can retry Delete account to finish. Updated apps and browsers clear that account’s local copy when they detect deletion online. Offline or older copies, system backups, and downloaded exports may remain.

A security record containing only the opaque account ID and deletion time is retained to prevent old sessions from restoring deleted data. It contains no name, email, weights, or credentials. The website does not yet offer an account-deletion button; use the iPhone app.

Reminders on iPhone

Reminders are optional local notifications. If enabled, coaching text can appear on the lock screen. You can turn reminders off in Settings.

About the guidance

Weight projections, protein targets, and food values are estimates. Food suggestions cover protein ideas, not a complete daily diet or personalized medical care. Check food labels, allergies, and your own dietary needs. The harsh coach is a tone preference, not a medical judgment.