Last updated: 11 November 2026
Terms of Use
1. Agreement
By installing or using Truewindow ("the app") you agree to these terms. The app is provided by heyisoft. If you do not agree, please do not use it.
2. What the app is
Truewindow turns the measurements you enter into a drawing, a 3D view, profile cutting lists on stock bars, glass sizes, an accessory list and a material quote, and produces PDF documents (quote, workshop sheet, glass order, installation sheet) that you can share.
3. What the app is not
- Not a substitute for checking. Cutting deductions, glass allowances, weld allowances and accessory rules depend on the profile system, the manufacturer's catalogue, your machines and your process. The app shows where each value comes from (your own entry, a source you named, or "not entered"). A value without a source is shown as "not computed", never guessed. Check your first piece before you cut the rest.
- Not manufacturer data. The built-in systems are examples. They are not any manufacturer's catalogue and are not approved by one. Enter or copy your own system's values from its official catalogue.
- Not a guarantee. Calculation is exact arithmetic on the values you give it; sheets, machines, sites and workshops are not.
- Not an engineering or compliance check. The app does not verify structural strength, wind load, thermal or acoustic performance, or building codes.
4. Your responsibilities
You are responsible for the work you do with the results: verifying them against the job, following the standards and regulations that apply where you are, and working safely. Do not use the app anywhere that looking at a phone is not safe.
5. Free and Pro
Free, with no account and no ads: the model catalogue, the 3D view, entering measurements and seeing the drawing and 3D view change, one project, every unit setting and every theme.
Truewindow Pro opens everything that is calculated from your measurements: cutting lists, 6 m bar plans, glass sizes, deductions, hardware and material lists, totals, the quote, workshop, glass order and installation PDFs, customer mode, unlimited projects, extra quote items, discounts, payment tracking, your own and copied profile systems, and your logo on the quote.
6. Plans, renewal and cancelling
Pro is offered as a monthly subscription and a yearly subscription. The price in your own currency is shown in the app before you confirm, and it is the one that applies. Where a free trial is offered it is shown on the same screen, it is granted once per store account, and the subscription starts when the trial ends unless you cancel before then.
Subscriptions renew automatically at the end of each period unless you cancel at least 24 hours before the period ends. Your account is charged for renewal within 24 hours of that point. You manage or cancel a subscription in your own store account — App Store → your name → Subscriptions on iOS, or Play Store → Payments & subscriptions on Android — not through us, and deleting the app does not cancel it. Payment is taken and refunds are handled by Apple or Google under their own terms; we cannot issue a refund on their behalf.
Changing phones or reinstalling does not cost you anything: tap Restore on the Truewindow Pro screen (or in Settings) while signed in to the same store account.
On iOS, Apple's standard Licensed Application End User License Agreement also applies.
7. Content and licences
The app, its drawings and its text belong to heyisoft. The measurements you type, the customer details, the systems and prices you enter, the projects you save and the files you export are yours.
8. Availability
The app runs offline and does not depend on a server. Checking a purchase does depend on Apple, Google and RevenueCat being reachable; when they are not, the app keeps working with the entitlement it last knew about.
9. Disclaimer and liability
The app is provided "as is", without warranty of any kind. To the fullest extent permitted by law, heyisoft is not liable for wasted material, rework, delay, loss of profit or any other loss arising from use of the app. Nothing here limits liability that cannot be limited by law.
10. Governing law
These terms are governed by the laws of the Republic of Türkiye, without prejudice to any mandatory consumer protection you have where you live.
11. Changes
If these terms change, the date at the top changes with them and the new version is published here before the app version that needs it ships.