Last updated: 11 November 2026

Privacy Policy

The short version. Truewindow has no account, no advertising and no tracking across other apps. Your measurements, customers, prices, quotes and settings stay on your phone. Two things leave the device: a purchase, handled by Apple, Google and RevenueCat, and anonymous usage statistics that tell us which screens and window types get used — never your measurements, never your customers. You can switch the statistics off in Settings; in the EU, EEA, the UK and Switzerland they stay off unless you agree.

1. Who we are

Truewindow ("the app") is made by heyisoft, a sole developer based in İzmir, Türkiye. You can reach us at heyisoft@gmail.com.

2. What stays on your phone

All of it. The app stores the following locally, using the operating system's own storage:

your unit, language, theme, haptics and opening-display settings;
the profile systems you defined or copied, and the prices you entered;
projects you saved, including the measurements, room names, and the customer name, phone number and address you typed;
your company name, phone, address, logo and the signature a customer draws in customer mode;
site photos you add to a window (up to six per window), stored compressed in the app's own folder;
extra quote items, discounts and the payments you record for a project;
small preview images of the model catalogue, so it scrolls smoothly.

None of this is uploaded anywhere. Deleting the app deletes it. There is no copy on our side, which also means we cannot restore it for you.

3. Files you create and share

When you share a quote, a workshop sheet, a glass order, an installation sheet or a backup, the file is handed to your operating system's own share sheet and goes wherever you send it. We never receive it. A PDF contains what you put in the project, including customer details you typed and, for the installation sheet, the site photos you added. A backup (.truewindow) contains everything the app stores on your phone, so keep it as safe as the phone itself.

4. What the app does not use

The app uses the camera only when you tap “Take photo” to add a site photo to a window; the picture stays on your phone. It does not use the microphone, your location, your contacts or your files in the background, and it requests no advertising identifier. It contains no advertising SDK and no crash reporter. If you choose a logo or a site photo from your library, the system photo picker opens and hands the app only the pictures you select. The backup restore opens the system file picker for the one file you select.

5. Purchases

Truewindow Pro is offered as a monthly or a yearly subscription; the yearly plan may start with a short free trial. When you buy:

Apple or Google takes the payment and holds the billing details. We never see your card, your address or your name.
RevenueCat (our purchase provider) receives the store receipt and an anonymous app user ID that is generated on the device. It uses them to tell the app whether Pro is active. See RevenueCat's privacy policy.

That anonymous ID is not linked to an account, an e-mail address or an advertising identifier, because the app has none of those.

6. Usage statistics

The app uses Google Analytics for Firebase to count how it is used, so we know which window types, screens and outputs are worth improving. See Firebase's privacy documentation. What is recorded is the shape of the session, never its content:

which tab or screen was opened, which window model was chosen, and whether a calculation produced a result (and, if not, a fixed reason group such as "a part has no source value yet");
that a quote, workshop sheet, glass order or backup was shared or restored, that a 3D view or customer mode was opened, that a price list or profile system was started — never the measurements, prices, customer names, company names or file names, only fixed categories and size ranges such as "2–5 windows in the project";
unit, language, theme and similar settings you changed;
that the Pro screen was shown, what opened it, and whether a purchase or restore started, completed or failed;
an app instance identifier generated on the device, plus the standard technical fields Firebase collects: device model, operating system version, country (derived from IP, which is not stored) and app version.

Advertising features are switched off: the Android advertising-ID permission is removed from the package and ad personalisation signals are disabled. Nothing is used to track you across other companies' apps or websites.

You are in control. If your device region is in the European Union, the European Economic Area, the United Kingdom or Switzerland, usage statistics are off until you agree: after the introduction the app asks once, in a small card ("Share usage data"), and sends nothing until you choose "Share". Elsewhere they start on. In every region, Settings > About > Usage statistics turns collection on or off at any time. While it is off, the app sends nothing. To have statistics already collected deleted, write to us and we will delete the app instance identifier that holds them.

7. Your customers' data

The customer names, phone numbers and addresses you type belong to you and your customers, not to us. They stay on your phone and in the files you choose to share. If your customers are covered by data-protection law (the GDPR, the Turkish KVKK or similar), you are the one who decides what to keep and share; the app gives you no way to send it to us.

8. Children

Truewindow is a professional trade tool. It is not directed at children and uses no personal data from anyone, including children; the usage statistics above are anonymous.

9. Your rights

Under the GDPR, the Turkish KVKK and similar laws you have the right to access, correct and erase your personal data. In practice: the app holds your data on your own device, so you already have all of it, and uninstalling erases it. For purchase records, contact Apple, Google or RevenueCat — they are the holders. For usage statistics, turn them off in Settings or write to us and we will delete them. If you want us to confirm any of this in writing, write to the address above.

10. Changes

If this policy changes, the date at the top changes with it and the new version is published here before the app version that needs it ships.