Privacy Policy for Notarium
This policy covers the Android app Notarium (application ID com.gante.notarium). Every sentence below is a statement about the code that ships in the app, not a statement of intent.
The short version: Notarium does not collect, transmit or share any personal data. Everything you do in the app stays on your device.
Overview
Notarium is a sheet music app: a library for scores you import or scan, a full-screen viewer with annotations, setlists, a metronome and audio player for practice, and a notation editor. It works completely offline.
There are no user accounts and no registration. The app never asks for your name, email address, contacts or location.
Data stored on your device
Notarium stores the content you create or import in the app's private storage on your device:
- sheet music files you import (PDF and images) and pages you scan;
- scores you write in the notation editor;
- song metadata: titles, composers, genres, tags, ratings, collections;
- annotations, bookmarks, link points, setlists;
- audio recordings you attach to songs;
- app settings.
None of this is uploaded anywhere. You can delete individual items in the app at any time; uninstalling the app removes all of its data from the device.
Android backup and phone-to-phone transfer
Backup is switched off in the app's manifest, both for Google Drive backups and for device-to-device transfer. Your library is not copied off the device by the system either; moving to a new phone means importing your files there again.
The app has its own backup instead: it can write the whole library — scores, markings and setlists — into a single file that you choose the location for, and restore it from that file on another device. That file goes exactly where you point the system file picker, and nowhere else.
No data collection
- Notarium has no user accounts and no registration.
- We integrate no analytics, no advertising and no crash-reporting SDKs of our own, and we collect no telemetry about you. One Google component does ship inside the app and does report to Google: the ML Kit document scanner described below brings Google's own data-transport library with diagnostics reporting enabled. It tells Google how its scanner performs; it carries no content you scan and nothing from your library, and we receive nothing from it. It is listed among the permissions below.
- The code we wrote performs no network requests at all: it contains no HTTP client, opens no sockets, and depends on no networking library. There is no path by which your scores, scans, annotations or settings could reach us. We operate no server and receive nothing from the app.
Permissions the release build declares
For completeness, here is every permission in the released app and where it comes from. None of them is a permission Android asks you to approve, and none is used by Notarium's own code:
- android.permission.INTERNET and android.permission.ACCESS_NETWORK_STATE — these are not requested by Notarium. They are merged into the app by com.google.android.datatransport:transport-backend-cct, a Google data-transport component that ships as part of the ML Kit document scanner libraries described below. Google uses that component to report its own usage and performance diagnostics about its scanner; the content you scan is not part of it, and Notarium sends nothing through it.
- com.gante.notarium.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION — a signature-level permission declared by the AndroidX core library so that the app can register broadcast receivers for itself. Only code signed with our own key can use it, so it grants nothing to any other app.
The app requests no runtime permissions whatsoever: no camera, no microphone, no location, no contacts, no storage.
Document scanner (Google ML Kit)
The "Scan" feature uses the ML Kit Document Scanner provided by Google Play services. Per Google's documentation, the entire document scanner flow operates on-device: capturing the page, detecting its edges and correcting perspective all happen locally. The scanner module (its models and interface) is delivered and updated through Google Play services rather than bundled with the app.
Notarium does not send your scans anywhere. The resulting images are saved only to the app's local library. The camera is operated by the Google Play services scanner screen only while you are scanning, under its own permission rather than ours. Google Play services is a component of your Android device provided by Google and governed by Google's Privacy Policy.
Files, imports and exports
- Importing and exporting files goes through the Android system file picker, so the app only accesses the specific files and locations you choose.
- Exports from the notation editor — MusicXML, MIDI, PDF and PNG — are produced on the device and written where you point the picker. Nothing is rendered or converted on a server, because there is no server.
- The app does not access your contacts, location, microphone, or files you have not explicitly picked.
Purchases
Notarium has no purchases, no subscriptions and no in-app billing. The release build bundles no billing library and declares no Google Play Billing permission, so there is no payment flow and no purchase data of any kind.
Analytics and advertising
The app contains no advertising SDK, no advertising identifier, no attribution SDK and no analytics of ours. Nothing profiles you, and nothing is shared with third parties for marketing.
Data retention and deletion
Because nothing is collected, there is nothing for us to retain or to delete on your behalf. Your data lives on your device for as long as you keep it: individual scores, annotations and setlists can be deleted in the app, and uninstalling Notarium removes everything it stored.
Children
Notarium does not collect personal data from anyone, including children.
Changes to this policy
If this policy changes (for example, if a future version adds optional cloud backup), the updated text will be published at the same address with a new effective date before the change takes effect.
Contact
Questions about this policy or your data: notarium@gi-gante.com