PrismDesk Privacy Policy
Effective 14 October 2026 / 発効日 2026 年 10 月 14 日
Who we are
PrismDesk is developed and published by Masato Okumura (奥村 真智), a sole proprietor trading as "async0x4c", based in Tokyo, Japan ("we", "us"). Contact: [email protected].
For the purposes of the EU/UK GDPR and the Japanese Act on the Protection of Personal Information (APPI), we are the controller for the limited data described in sections 2 and 3.
1. The PrismDesk apps do not collect your data
The PrismDesk Windows host application, the PrismDesk virtual display driver, the PrismDesk virtual camera and the PrismDesk Android client do not collect, store or transmit personal data to us or to any third party.
- All screen, audio, camera and input data travels directly between your own devices over your local network. It never passes through our servers. We have no servers that receive your content.
- The apps contain no analytics, advertising or tracking SDKs.
- The apps do not contact our servers at all. There is no automatic update check in version 1.0; when we publish a new version you download it yourself.
- Licence keys are verified offline on your computer. Activation does not contact our servers.
- Diagnostic logs and the "Export diagnostics" file are written only to your
own computer (
%LOCALAPPDATA%\PrismDesk). They reach us only if you choose to attach one to a support email. They contain technical information about your session (device names, display resolutions, IP addresses on your local network, timings and error codes) — please review the file before sending it.
Android permissions
| Permission | Why the app asks for it |
|---|---|
| Camera | To read the connection QR code shown by the Windows host, and — only if you turn the feature on — to send your device's camera to the PC as a virtual webcam. |
| Internet, network state, Wi-Fi state, multicast, nearby Wi-Fi devices | To find your PC on the local network and to exchange video, audio and input with it. |
| Notifications, foreground service, wake lock | To keep the session running and show its status while the app is in the background. |
The app does not request location, contacts, storage or microphone permissions, and does not use any permission to determine your location.
The QR code is decoded on your device with Google's ML Kit barcode-scanning library in its bundled, on-device form. Your camera images never leave your device: Google's terms state that "processing of the input data (e.g. images, video, text) fully happens on-device, and ML Kit does not send that data and the resultant outputs to Google servers."
ML Kit does, however, send usage metrics to Google. This happens whenever the scanner runs, it is part of the library, and we cannot switch it off. According to Google, these metrics are limited to:
- device manufacturer, model, OS version and build, and available ML hardware;
- our app's package name and version;
- a per-installation identifier that, in Google's words, is "not intended to uniquely identify a user or physical device";
- latency measurements, the image format and resolution passed to the scanner, and the size of its input and output;
- the ML Kit version, the type of event (initialisation, detection, release) and any error code.
Google states that it uses this data "to measure performance, debug, maintain and improve the APIs, and detect misuse or abuse", that it encrypts the data in transit over HTTPS, and that it does not transfer it to third parties. We never see it. We do not enable ML Kit's auto-zoom feature, so the additional scan-session data Google associates with that feature is not collected either.
ML Kit is governed by Google's terms (https://developers.google.com/ml-kit/terms, last updated 14 May 2025) and its data disclosure (https://developers.google.com/ml-kit/android-data-disclosure).
2. Purchases are processed by our merchant of record
PrismDesk Pro licences are sold by Polar Software, Inc. ("Polar"), who is the seller and merchant of record and an independent controller of the personal data you provide at checkout (name, email address, billing country, payment details). Polar's privacy policy: https://polar.sh/legal/privacy
Polar shares with us your name, email address, country, order ID and licence key, so that we can deliver the licence and provide support. Legal basis: performance of a contract and our legitimate interest in supporting our customers.
We keep this information for as long as your licence is valid, and afterwards for 7 years as required by Japanese tax and bookkeeping law.
3. Support and the optional newsletter
- Support. If you email [email protected] we process your email address, your name and the content of your message, including any diagnostic files you attach, in order to answer you. Legal basis: performance of a contract, or our legitimate interest in providing support. Retention: 2 years after the last message in the thread.
- Newsletter (optional). If you subscribe on our website we store your email address to send occasional product announcements. Legal basis: your consent, which you may withdraw at any time using the unsubscribe link in every message. Processor: Kit Inc. (an Idaho corporation, United States; formerly ConvertKit), whose privacy policy is at https://kit.com/privacy. Retention: until you unsubscribe.
We do not sell your personal data, and we do not use it for advertising.
4. Our website
Our website is hosted on Cloudflare Pages. Cloudflare processes connection data, including IP addresses, as our processor in order to deliver the site and protect it from abuse.
We use Cloudflare Web Analytics, which uses no cookies, no client-side storage and no fingerprinting, and does not collect personal data. We therefore do not display a cookie banner. Cloudflare serves this site, and Cloudflare Web Analytics is enabled for it.
5. International transfers
We are based in Japan. If you are in the EEA or the UK, the personal data described in sections 2 and 3 is transferred to Japan. Japan has an adequacy decision from the European Commission and from the UK, so no additional safeguard is required for that transfer. Our processors (Polar, Cloudflare and our email provider) apply their own transfer mechanisms, described in their privacy policies.
6. Your rights
Depending on where you live, you may have the right to access, correct, delete, port or restrict the processing of your personal data, to object to processing, and to withdraw consent. Email [email protected]; we answer within 30 days.
You may also complain to your data-protection authority: your national authority in the EEA, the Information Commissioner's Office in the UK (https://ico.org.uk/), or the Personal Information Protection Commission in Japan (https://www.ppc.go.jp/).
個人情報保護法に基づく公表事項
| 項目 | 内容 |
|---|---|
| 個人情報取扱事業者 | 奥村 真智(屋号 async0x4c・個人事業主) |
| 所在地 | 東京都(詳細は請求があれば遅滞なく電子メールにて開示します) |
| 利用目的 | ライセンスの発行・管理、サポート対応、(同意を得た場合)製品情報の配信、法令上の帳簿保存 |
| 第三者提供 | 法令に基づく場合を除き行いません。決済事業者(Polar Software, Inc.)は独立した事業者として決済情報を取り扱います |
| 外国にある第三者への提供 | Polar Software, Inc.(米国)/ Cloudflare, Inc.(米国)/ Kit Inc.(米国アイダホ州)。いずれも各社のプライバシーポリシーに従って取り扱われます |
| 安全管理措置 | 二要素認証を有効にしたアカウントでのみ保管し、業務上必要な範囲でのみ利用します |
| 開示・訂正・利用停止等の請求窓口および苦情の申出先 | [email protected] |
7. Children
PrismDesk is not directed at children under 13, and we do not knowingly collect personal data from them. If you believe a child has sent us personal data, email [email protected] and we will delete it.
8. Changes to this policy
We will post any change on this page and update the date at the top. If a change is material we will also announce it on our website.