Cash Reader Privacy Policy
Last updated: September 8, 2026
This Privacy Policy explains how Cash Reader handles information. It covers the Cash Reader mobile apps for iOS and Android and the Cash Reader website at cashreader.app. Cash Reader helps people who are blind or have low vision identify banknotes: you point your device camera at a banknote and the app says its value out loud.
The short version: the Cash Reader apps have no user accounts and do not ask for your name, email, or other identifying details. Banknote recognition runs on your device. The apps use a few standard third-party tools for crash reporting, analytics, and advertising measurement. The website uses Meta Pixel and the AppsFlyer Web SDK to measure page visits and download actions, and it sends your email address and message to Web3Forms only if you choose to submit the contact form. These uses are described below.
Who we are
Cash Reader is provided by Cash Reader s.r.o., which is the data controller:
- Cash Reader s.r.o.
- Udolni 408/52, 602 00 Brno, Czech Republic
- VAT ID: CZ06797580
For any privacy question or request, contact us at [email protected].
Information the app does not collect
- No accounts. Cash Reader has no sign-up or sign-in. We do not ask for your name, email address, phone number, or a password.
- No personal information through input fields. The app does not ask you to enter personal details.
- No precise location. The app does not collect GPS or other precise location data.
- No address book, photo library, or microphone data. The app uses the camera only, as described below.
Information the app does collect
Camera. Cash Reader uses your camera to read banknotes. The camera image is processed on your device to recognize the banknote. It is not uploaded or stored as part of normal use. The one exception is the optional photo submission described below, which you start yourself.
Crash reports and analytics. Cash Reader uses Google Firebase for crash reporting and for aggregated usage analytics. This collects technical information such as device model, operating system version, app version, language, crash logs, and counts of in-app events. It is aggregated and is not used to build a profile of you as an individual.
Advertising measurement. So that we can see which of our own ads bring new users and how the app performs, Cash Reader uses AppsFlyer (marketing attribution) and the Meta (Facebook) SDK for basic app events. These tools collect device and usage data in an anonymous or aggregated form. On Apple devices this is governed by Apple’s App Tracking Transparency: if you decline the prompt the app shows during onboarding, these tools do not track you.
Information the website handles
Page visits and download actions. The main website pages initialize Meta Pixel and the AppsFlyer Web SDK. Meta Pixel records a PageView when one of these pages loads. The AppsFlyer Web SDK measures website visits. When you activate a Download button, the website records a download_click event in AppsFlyer with the current page and any available campaign attribution, and records a Meta Lead event identified as a download click. These event names and values come from the website implementation; the website does not create a Cash Reader user account.
Facebook campaign attribution. If you arrive with utm_source=facebook, utm_source=fb, or a fbclid URL parameter, the website stores the campaign name, ad set, ad, fbclid, landing time, and a fixed website channel value in your browser’s sessionStorage. On that attributed arrival, it records one website_visit event per page session in AppsFlyer, including the campaign fields, fbclid, and landing page. For up to 30 minutes, the stored record is also used to route Download buttons through an AppsFlyer OneLink URL; the subsequent download_click event includes the source, campaign, ad set, ad, and current page. An expired attribution record is ignored and removed when the website next checks it.
Language preference. If you choose a website language, the language code is stored in your browser’s localStorage so the website can offer that language again.
Contact form. If you choose to submit the website contact form, the email address and message you enter are sent over HTTPS to Web3Forms, which delivers the submission to us. The website has no account system, and the form is not submitted unless you activate its Submit button.
Optional photo submission
Cash Reader includes one optional feature that lets you send a photo of a banknote to us, for example to report a recognition problem. It is turned off by default.
- It is opt in. The button that submits a photo is hidden until you turn it on in the app settings.
- Submitted photos are stored on Amazon Web Services (AWS), kept only for a reasonable time, used to improve banknote recognition, and then deleted.
- They are anonymous (photos of banknotes, not linked to your identity) and are never shared with third parties.
If you never enable this feature, no photos are ever sent.
On-device processing and offline use
Banknote recognition runs entirely on your device. After a one-time download of a currency, Cash Reader works fully offline. We operate no account system, and the only content you can send through the app is the optional photo submission above. The separate website contact form is described under Information the website handles.
Purchases
Cash Reader offers a paid version. Purchases and subscriptions are handled by the Apple App Store and Google Play. We never see or store your payment card details. Billing, receipts, and cancellations are managed through your Apple or Google account.
How we use information
We use the limited information described above only to:
- operate and provide the app,
- keep the app stable and fix bugs (crash reports),
- understand how the app is used, in aggregate (analytics),
- measure and improve our advertising (attribution), subject to your tracking choice on Apple devices,
- measure website visits and download actions and preserve Facebook campaign parameters while routing a Download link,
- deliver and respond to a website contact message you choose to send,
- improve banknote recognition (only the optional photos you choose to send).
We do not sell your information.
Service providers and sharing
We do not sell personal data. We share limited data only with the service providers below, which process it on our behalf to provide the functions described above:
- Google Firebase (Google): crash reporting and aggregated analytics. Privacy
- AppsFlyer: marketing attribution in the apps and website visit, campaign, and download-action measurement through its Web SDK; app tracking on Apple devices is subject to your App Tracking Transparency choice. Privacy
- Meta Platforms: the Facebook SDK for basic app events and Meta Pixel for website page views and download-action measurement; app tracking on Apple devices is subject to your App Tracking Transparency choice. Privacy
- Amazon Web Services (AWS): secure storage for the optional photos you choose to submit. Privacy
- Web3Forms: processing and delivery of the email address and message you choose to submit through the website contact form. Privacy and GDPR information
The optional photo submissions are used only to improve recognition and are not shared beyond this storage.
Your choices
- App Tracking Transparency (Apple devices). When the app asks for permission to track during onboarding, you can decline, and the advertising measurement above will not track you. You can change this later in your device settings.
- Optional photos. Leave the photo submission feature off (its default) and no photos are ever sent.
- Website contact. You can contact us by email instead of submitting the website form. If you do not submit the form, it does not send an email address or message to Web3Forms.
- Website browser storage. You can clear the website’s
sessionStorageandlocalStorageusing your browser controls. Clearing these values removes the stored campaign attribution and language preference, but it does not undo measurement events already sent to Meta or AppsFlyer. - Stop app collection. You can stop collection by the app at any time by uninstalling it.
Children’s privacy
Cash Reader is not directed at children and does not knowingly collect personal information from children. Because there are no accounts and no personal input fields in the app, the app does not gather the kind of personal information covered by laws such as COPPA. If you believe a child has provided us with personal information through the website contact form or otherwise, contact us and we will address it.
Data retention and deletion
Because there are no accounts, there is no Cash Reader account profile for us to keep or delete. Crash and analytics data is retained only for as long as it is useful, in line with the providers’ standard retention. Optional photo submissions are deleted after a reasonable time. The website uses a Facebook campaign attribution record only while it is less than 30 minutes old and removes it when it next finds the record expired; its once-per-session marker is stored in sessionStorage, and its language preference is stored in localStorage. Retention by Meta, AppsFlyer, and Web3Forms is governed by their policies linked above; we do not assign a different provider-side retention period here.
Your rights
Depending on where you live, you may have rights over your personal data, such as the right to access, correct, or delete it, under laws like the EU and EEA General Data Protection Regulation (GDPR). If you have a request or a question, contact us at [email protected] and we will help.
Security
Recognition happens on your device, and we run no account system, so there is no account database. The data described above—including crash and analytics data, website measurement, a website contact message, and any optional photos you submit—is processed by the applicable providers (Google, AppsFlyer, Meta, AWS, and Web3Forms); their policies are linked under Service providers and sharing.
Changes to this policy
We may update this Privacy Policy as the app evolves or as the law requires. When we make a material change, we will update the date at the top of this page.
Contact
Cash Reader s.r.o., Udolni 408/52, 602 00 Brno, Czech Republic