Privacy Policy
Prosthetic Brain (Karasu Software) — Last updated: June 2026
This policy explains what data Prosthetic Brain ("the app") collects, how it's used, and who it's shared with. The app is built around storing your information on your own device — there is no Karasu Software account, login, or user database. Most data never leaves your phone except where described below.
Data stored on your device
The app stores the following locally, in app-private storage, for the app's core features to work:
| Data | Why |
|---|---|
| Destinations, departure alarms, simple/location alarms | Core alarm/departure-tracking functionality |
| Medication / dose reminders, dose history, refill counts | Medication reminder and refill-tracking features |
| Cycle-tracking entries (if enabled) | Optional menstrual cycle tracker feature |
| Important locations, contact names/photos (if added) | Important-location and sharing features you choose to set up |
| Checklists | Checklist feature, optionally synced if shared with another device (see below) |
| Home address / saved locations | Travel-time calculation for departure alarms |
| Diagnostic/telemetry log (on-device only) | Used to help diagnose bugs if you choose to submit feedback |
| Garden hardiness zone and planting-reminder dates | Optional garden-zone detection feature — computed entirely on-device from a one-time GPS reading against a bundled lookup table; never sent to Karasu Software or any other service |
If you use Android's built-in backup (Auto Backup / device transfer), most of this data is included in that backup. That backup is stored in your own Google account, managed by Google — Karasu Software does not host, receive, or have access to it. Encrypted credentials (such as API keys) are excluded from backup and re-created on first run.
Data sent to other services
The app talks to a small number of outside services, only when the relevant feature is used:
| Service | What's sent | When |
|---|---|---|
| Google Maps Geocoding / Directions API | An address or coordinates you provide, for the manual "geocode" button and for calculating travel time to destinations | When you manually geocode an address, or when a departure alarm needs travel-time data |
| LocationIQ | Address search text (restricted to US/Canada results) | Address autocomplete and calendar-import destination lookup |
| National Library of Medicine (RxNorm/RxTerms) and openFDA | A medication name you enter | Medication autocomplete, drug-label, recall, and interaction lookups |
| ip-api.com | Your device's IP address (used to estimate a coarse location) | Fallback origin lookup if GPS/Wi-Fi location isn't available |
| Google AdMob | Standard mobile-ad identifiers, subject to your consent choice | Only on the free, ad-supported tier — never for paid subscribers. Ad personalization is gated behind Google's consent prompt (UMP), shown before any ad request is made |
| Google Play Billing | Purchase/subscription status | If you subscribe to a paid tier |
| Karasu Software's Azure storage | Shared checklist data and important-location data, end-to-end encrypted before upload; optional crash/bug feedback reports (description, optional screenshot, diagnostic log), encrypted before upload | Only if you share a checklist with someone else, or choose to submit feedback from within the app: each individual dataset can be added individually to provide context for specific feedback. |
Feedback submissions and shared-checklist data are encrypted on your device before upload — Karasu Software's storage holds ciphertext, decryptable only by the intended recipient (for shared checklists) or by the bug-tracking process (for feedback reports). Feedback reports are retained only as long as needed to investigate the issue, then deleted.
Permissions
| Permission | Purpose |
|---|---|
| Location (fine/coarse/background) | Departure-alarm travel monitoring, optional geofence-based location alarms, and optional one-time garden hardiness-zone detection (computed on-device, no location data leaves your phone) |
| Calendar | Optional calendar import, to create departure alarms from your events |
| Contacts | Optional — attaching a contact to an important location or shared checklist |
| Notifications, exact alarms, full-screen intent, vibrate | Showing alarms and reminders reliably, including over the lock screen |
| Foreground service | Keeping departure monitoring and geofencing running while the screen is off |
| Boot-completed | Restoring your scheduled alarms after the device restarts |
| Display over other apps | Full-screen alarm alerts and optional floating checklist/timer overlays |
None of these permissions are used to collect data beyond what's needed for the feature they're tied to, and none are shared with advertisers.
Children's privacy
Prosthetic Brain is not directed at children and is not knowingly used to collect personal information from children under 13.
Your choices
You can delete any data you've entered directly within the app (medications, alarms, locations, checklists, etc.), export your dose history, or uninstall the app to remove all locally stored data. Shared-checklist data tied to your device can be removed by leaving the shared checklist from within the app.
Changes to this policy
If this policy changes, the "last updated" date above will change accordingly. Continued use of the app after an update means you accept the revised policy.
Contact
Questions about this policy or your data can be sent via the in-app "Provide Feedback" option, or by email to support@karasusoftware.com.