Effective date: 12 November 2026
1. Scope
This policy covers Weatherglass Pro for Mac and the Weatherglass Pro pages on yangopen.com, including the activation page. Weatherglass Pro is made and sold by Yang Yang HOANG LE, an individual developer in Vietnam who runs Yangopen (“we”). Your Yangopen account itself is covered by the Yangopen privacy policy. The free open-source Weatherglass on GitHub is a separate app with its own page there.
2. What stays on your Mac
- Your choices: what falls, its direction, amount, size, speed, sway, opacity, tint and depth.
- Your windows: the app reads where your windows are, so that things can land on them. It does not read what is in them.
- Licence: your licence key.
We cannot see this data.
3. Activation and the trial
When you activate the app, we receive and keep:
- the Yangopen account that approved (its id; the account holds your e-mail address);
- a SHA-256 fingerprint of the Mac code, never the code itself. The Mac code is a short value derived from the Mac's hardware id; it says which Mac, not who you are;
- the date the trial started and the date it ends.
The app also sends the Mac's name (as set in macOS) and the app version, and our server reads the country from your network address. The activation page shows them so that you can check it is your Mac. They are kept with a fingerprint of the request, never the request's secret, and deleted automatically once the 10-minute code is a day past its expiry.
We use them only to give one trial per account and per Mac, and to give the same key again when you ask again. The key itself is not stored: it is signed again from these dates. When you delete your Yangopen account, the record loses its link to the account; the fingerprint and the dates are kept, only so that the same Mac does not get a second trial. Like any website, the server sees your network (IP) address, used to limit how often a request can be sent.
When you buy Weatherglass Pro, we keep the order (account, plan, amount, reference, date paid) and the Macs activated on that licence (the Mac's name, a SHA-256 fingerprint of its Mac code, the date), to count Mac places and to help when you move to a new Mac. When you remove a Mac from your account, we keep the date and that fingerprint, to count removals (one per two Macs every 6 months); they are deleted with your account. Bank transfers are handled by ApiPay and cards by Polar; we never see your card number.
4. When the app goes online
- The weather: the app asks a weather service for the weather at your place. This request goes from your Mac to that service, not through us.
- Activation, when you click Activate: the app sends yangopen.com its Mac code, the Mac's name and the app version, waits for your approval and receives its licence key. After that, the licence needs no network.
- Links you click, such as the activation page, open in your browser.
These sites see your IP address, as with any website. The app contains no advertising or analytics tools.
5. Your rights and deleting data
- Data on your Mac: removing the app deletes it from the Mac.
- Trial records: e-mail [email protected] to ask what we keep. Deleting your Yangopen account removes the account from the record (section 3).
6. Children
The app is not made for children. We do not knowingly keep data about children.
7. When you e-mail us
When you write to [email protected], we receive your e-mail address and what you wrote, and use them only to answer you.
8. Changes and contact
If a later version handles data differently, we will update this page and the date above no later than when that version is released. Send privacy questions to [email protected].