Privacy Policy

NoteLens — banknote identifier

Last updated: August 2026

What is stored on your device

All of the following is written to a private database inside the app's own storage area, readable only by NoteLens:

• Banknotes you save, including country, currency, denomination, year, series and condition.
• Photographs you capture or import, if you have image retention switched on in Settings.
• Your own entries: purchase price, purchase date, where you found a note, and your personal notes.
• Your scan history, if you have history switched on in Settings.
• Your app preferences, and your recent searches.
• Reference catalog records the app has downloaded, cached so the app works offline.

What leaves your device

When you run an identification, the banknote image is sent over an encrypted connection to an AI vision provider for analysis. Before it is sent, the app resizes it, re-compresses it, and strips the embedded metadata that cameras attach — including GPS coordinates, device model and capture timestamps.

The request passes through a server we operate, which holds the credential for the AI provider and forwards the image. That server does not store your image, does not log it, and retains nothing about the request beyond a counter used for rate limiting. The image is held only for the seconds the request takes.

The AI provider is currently Google, via the Gemini API, and processes the image under Google's privacy policy and the terms of that service. If the provider changes, this policy will be updated.

Nothing else is transmitted with the image. Your personal notes, your purchase prices, your location entries and the rest of your collection are never sent anywhere. No identifier for you or your device accompanies the image.

If a reference catalog is configured, the app also requests catalog records. Those requests contain search terms and note characteristics, not your photos or your personal entries.

Optional usage and crash reporting

You may choose to share anonymous usage and crash reports. This is off unless you turn it on. You are asked once, when you first open the app, and you can change your answer at any time in Settings → Privacy. Every feature works identically either way.

If you turn it on, the app reports: which screens you open, whether an identification succeeded or failed and why, how long it took, whether a photo was rejected by the quality check, and technical diagnostics when the app crashes.

If you turn it off — or never turn it on — none of that is sent, and the reporting components are switched off rather than left running silently. Turning it off also clears the anonymous identifier used to group reports, so a later change of mind starts fresh rather than resuming.

This reporting is provided by Google Firebase (Analytics, Crashlytics and Performance Monitoring), which processes it on our behalf under Google's terms. It is dormant until you opt in.

What is never collected

The following are never sent, whether or not you enable usage reporting:

• No account, name, email address or phone number.
• No advertising identifier, and no advertising. The app does not request the permission that would grant access to one.
• No banknote data. Not your serial numbers, countries, denominations, conditions or catalog matches. (The photograph itself is sent for identification, as described above, and nothing is derived from it on our side.)
• No search terms, personal notes, purchase prices or file paths.
• No location. "Location found" on a note is free text you type; the app never requests a location permission.
• No contacts, microphone, phone state, or SMS access.

Permissions

NoteLens requests exactly one runtime permission:

• Camera — to photograph a banknote. Nothing is recorded until you press the shutter, and audio capture is disabled entirely.
• Choosing an existing photo uses your system photo picker, which hands the app one file you selected and requires no library permission.

Retention and deletion

Everything is under your control, because everything is local:

• Delete a single note from its detail screen.
• Clear your entire scan history from Settings.
• Turn off image retention in Settings, and photos are discarded as soon as an identification returns.
• Delete all local data from Settings, which removes the database and every stored image.
• Uninstalling the app removes everything it stored.
• Device backup is switched off for the app's data, so your collection is not copied off the device by the operating system.

There is no account to delete, because there is no account.

Third parties

• The AI vision provider described above, which receives the banknote image you submit.
• Google Firebase, which provides the optional usage and crash reporting described above, and only after you opt in.
• A banknote catalog service, if one is configured in your build, for reference records.

There are no advertising networks and no social media SDKs in this app, and nothing here is used to build a profile of you or to track you across other apps or websites.

Children

NoteLens is not directed at children and does not knowingly collect information from them. It collects no personal information from anyone, so there is nothing held about a child user either. The optional usage reporting described above is anonymous and is off by default.

Changes to this policy

This policy may be updated to reflect changes in how the app works. The "last updated" date above changes when it does. If what leaves your device ever changes, that section is what to re-read.

Contact

This app is published by Wixpa. Questions about privacy can be sent to usmansgd42@gmail.com.