Status: May 1, 2026
We are thrilled that you are using our Simple Habit Tracker app. We believe that building habits should be a personal journey, which is why we built this app with a strict privacy-first, offline architecture. Below, we detail exactly how the app handles data, how it is structured, and how your privacy is protected under the General Data Protection Regulation (GDPR).
1. Data Controller
The entity responsible for data processing in accordance with the General Data Protection Regulation (GDPR) is:
Sick App Developers GmbH Messeler-Park-Straße 85 64291 Darmstadt Germany Email: simplehabittracker@sickappdevelopers.com
2. Locally Stored Data (Strictly On-Device)
All of your habit tracking data remains 100% locally on your device. We, the developers, do not have access to this information. It never leaves your device and is never uploaded to any of our servers.
Habit Data (Isar Database)
- What it is: Text strings, numerical counters, and date arrays stored within a high-performance local database (
isar). - Example:
{"habitName": "Morning Run", "completedDates": ["2026-05-01"], "currentStreak": 5, "longestStreak": 12} - Usage: Strictly used to record your habit completions, calculate your streaks, and display your progress charts within the app.
App Preferences (Shared Preferences)
- What it is: Boolean (true/false) and text values stored locally to remember your settings.
- Example:
{"theme": "dark", "vibrationsEnabled": true, "startOfWeek": "Monday"} - Usage: Customizes the app’s user interface and functional feedback (like haptics) to your personal preferences.
3. Data Processed by Third-Party Services (Transmitted)
The only time the app communicates with the internet is to process, manage, and validate your Premium Subscriptions (In-App Purchases). We do not process direct payment information (such as credit card details) ourselves; payments are handled entirely securely by the Apple App Store or the Google Play Store.
Subscription & Device Data (RevenueCat)
- What it is: An anonymous, randomly generated App User ID, digital purchase history/entitlements, basic device meta-information, and your IP address (which is used by RevenueCat for regional pricing/tax purposes and usually anonymized).
- Example:
$RCAnonymousID:xyz987abc,Entitlement: Premium active,Device: iPhone 15 Pro, iOS 17.4,IP: 198.51.100.x - Usage: Transmitted securely to our data processor, RevenueCat (RevenueCat, Inc., USA), solely to verify your subscription status and unlock premium features within the app.
4. What We Explicitly DO NOT Collect
To further clarify our commitment to your privacy, we guarantee that the Simple Habit Tracker features:
- No Personal Data Collection: We do not collect names, email addresses, or phone numbers, as there is no user account or login system required to use the app.
- No Analytics or Tracking: We do not use any tracking SDKs (like Google Analytics or Firebase). We do not track your behavior, taps, or screens viewed.
- No Advertising Data: The app is completely ad-free. Therefore, we do not access, collect, or transmit your device’s advertising identifiers (such as the Apple IDFA or Android AAID) to any advertising networks.
5. Your Rights as a Data Subject
Under the GDPR, you have rights regarding your personal data. Because your habit data and preferences are stored exclusively on your own device, you have complete and immediate control over exercising these rights:
- Right to Erasure (Art. 17 GDPR): You can instantly and permanently delete all your habits, streaks, and preferences simply by uninstalling the app or clearing the app’s local data in your device settings. We do not maintain any cloud backups to delete on our end.
- Right of Access & Rectification (Art. 15 & 16 GDPR): You have full, direct access to view, edit, or delete any specific habit or logged completion through the app’s interface at any time.
For any inquiries regarding data protection, or to address issues related to your purchase history (handled via RevenueCat), please contact us at simplehabittracker@sickappdevelopers.com.