Privacy Policy
Last updated: 17 October 2026
Short version: Duplex AI works on your computer. Your files, file names and folder contents are never uploaded to us or to anyone. There is no account, no advertising and no analytics in the app. This page lists the few things that do leave your computer, and why.
The person responsible for this information is Nirmit Pujara, an individual developer based in India (“the developer”, “we”, “us”).
1. What stays on your computer
- Everything the scan looks at: file names, folders, contents, hashes, thumbnails, previews, similarity scores and your results. This includes the AI modes: the analysis runs locally.
- Your settings, your scan history and a speed-up cache of file fingerprints. They are kept in the app’s own data folder on your computer. You can delete them at any time (Settings, or by deleting that folder). Uninstalling does not need anything from us.
- Reports you export are saved to your Downloads folder. They only go where you send them.
2. What does leave your computer, and who receives it
| When | What is sent | To whom |
|---|---|---|
| You activate or re-check a Pro licence (about weekly) | Your licence key and an anonymous computer identifier (a one-way hash; it cannot be turned back into anything about you). Your IP address is visible to them as with any internet request. | The licence/payment provider (Lemon Squeezy at launch) |
| You buy Pro inside the app | A random one-time claim code that the app made up, so your key can come back to the app without you copying it. The checkout page itself is run by the payment provider, who collects your name, email, card or UPI details and country. We never see your card details. | Payment provider; our small licensing service (hosted on Cloudflare), which keeps the claim code and your licence key for 24 hours and the order link for 7 days, then forgets them. It stores no names, emails or file information. |
| You first use a Pro AI mode | A download request (so the host sees your IP address) for the Pro components and for AI model files. | GitHub (our release files); the publishers of the AI models used (OpenAI’s CLIP weights host, PyTorch/torchvision weights host, Hugging Face for the sentence model) |
| You check for or install an app update | A request for the update description, which reveals your IP address and the app version. | GitHub (our release files) |
| You click Email us / Report a bug | Opens your own email program with a draft. Nothing is sent until you press send in it. The draft may include the app version and operating system, which you can edit or delete. | The developer, by your email |
We do not sell your data, do not use it for advertising, and do not build profiles. There is no telemetry or crash reporting in the app.
3. This website
- The website is hosted on Cloudflare, which like any host sees your IP address and browser details in its logs.
- To show prices in your currency, your browser asks a free location service (ipapi.co) which country your IP address is in. That service receives your IP address. If you block it, the page shows rupees with dollar prices in brackets.
- The page loads its styling and font from Tailwind’s CDN and Google Fonts.
- The page remembers your theme and language choice in your browser’s local storage. There are no tracking cookies and no analytics.
4. Payments
Payments are handled entirely by the payment provider, which is the seller of record and a separate controller of your payment data under its own privacy policy. We receive from them the information needed to run the licence, such as that an order was paid and a licence key, and sometimes your email address for support or refunds.
5. Messages you send us
If you email us, we keep your message and address only as long as needed to help you and to keep a record of bugs and refunds, and use them for nothing else.
6. Your choices and rights
You can ask us what we hold about you, ask us to correct or delete it, or withdraw consent for anything we do with your consent, by emailing us. Because we hold almost nothing, there is usually little to delete; most information (payment records, tax records) sits with the payment provider, and you should contact them for that. We handle requests within 30 days. Where laws such as India’s Digital Personal Data Protection Act, 2023 or the EU/UK GDPR apply to you, you have the rights those laws give.
7. Children
Duplex AI is not directed at children under 13 (or the age of digital consent where you live), and we do not knowingly collect their information.
8. Security
The app opens no network port and accepts no connections from other programs or computers; the interface and the scan engine talk through a private channel inside the app. Network requests the app makes use HTTPS. No system is perfectly secure, and we cannot promise absolute security.
9. Changes
If we change what is collected or shared, we will update this page and its date, and tell you in the app or on the website if the change matters.
Contact
Questions, complaints or requests about this page: email the developer. We acknowledge messages within 48 hours and aim to resolve them within one month.
This document was written for a small, one-person software project. It is a plain-language agreement, not a substitute for legal advice. If a part of it is found unenforceable, the rest still applies.