I built Weight Tracker – Simple Log as a privacy-focused app. Here's what data the app uses, how it's handled, and the choices you have.
Entries, notes and photos live on your device. No account, no backend, no ads.
01
Overview
Weight Tracker – Simple Log is a local-first app. Your weight entries and related data are stored on your device. The app includes optional Apple Health (HealthKit) syncing, optional local notifications for reminders, and basic analytics to improve the app.
02
Data we collect
The app collects and stores the following data on your device:
Weight entries (value and date/time)
Optional notes attached to entries
Optional photos attached to entries
Derived BMI data and height (if you enable BMI tracking)
Goal weight and app settings/preferences (units, reminders, etc.)
If you enable Apple Health (HealthKit) syncing, the app can:
Write weight data to Apple Health
Read weight data from Apple Health when you choose to import
The app does not collect:
Account information (no sign-in or accounts in the app)
Contacts, calendar data, or messages
Precise or approximate location
Advertising identifiers or data for ad targeting
Crash reporting data via third-party crash SDKs (none are used)
Payment card details (handled by Apple)
The app also sends limited analytics events to TelemetryDeck (see Third-Party Services). These events describe app usage — screen opens, feature usage, purchase flow events. Your weight values or notes are never sent in analytics events.
03
How we use data
Data is used to:
Provide core features (logging, charts, trends, reminders)
Calculate BMI and insights when enabled
Sync with Apple Health if you turn on HealthKit integration
Improve the app based on aggregate analytics usage patterns
Confirm premium purchase status through Apple
04
Data storage & security
Your weight entries, notes, settings, and derived data are stored locally on your device using on-device storage
Photos are stored locally in the app's document storage
Widget data is shared locally between the app and the widget using an App Group
There is no backend server for your app data
If you enable HealthKit, weight data is stored in Apple Health and governed by Apple's Health privacy controls
05
Third-party services
The app uses the following third-party services:
TelemetryDeck: Analytics events about app usage and feature interactions
Apple Health (HealthKit): Optional syncing of weight data with the Health app
Apple StoreKit / App Store: Payments and purchase validation
No advertising networks are used.
06
Payments / subscriptions
The app offers a one-time premium purchase through Apple's StoreKit. Payments are processed by Apple. I only receive purchase status/entitlement information and never receive payment card details.
07
Device permissions
The app may request the following permissions:
HealthKit: To read and write weight data if you enable Apple Health syncing
Camera: To take photos for attachment to weight entries
Photo Library: To select photos to attach to weight entries
Notifications: To deliver local reminders you configure
08
Data retention & deletion
Your data stays on your device until you delete it
You can delete individual entries (and their attached photos) within the app
To remove all app data, you can delete the app from your device
If you enabled HealthKit, you can manage or delete Health data in the Apple Health app or revoke the app's Health permissions in iOS settings
09
Children's privacy
This app is not intended for children under 13, and I do not knowingly collect personal data from children.
10
International users
Your core data is stored locally on your device. If you enable analytics, limited event data is sent to TelemetryDeck, which may process data on its infrastructure outside your country. Please review TelemetryDeck's privacy practices for details.
11
Changes to this policy
I may update this policy from time to time. Changes will be posted on this website and within the app where applicable.