Terms of Use

Effective date: October 11, 2026

These Terms of Use (“Terms”) apply to Construction Cost Calculator (the “App”), published by Mert Korkmaz under the name MertApp (“we”, “us”). By downloading or using the App you agree to these Terms. If you do not agree, please do not use the App.

1. The App

Construction Cost Calculator is a free tool that estimates material quantities and costs for construction and home projects, such as concrete, rebar, masonry, tiles, flooring, roofing, paint and excavation, and converts between units. You can add your own material prices, save results to projects and share them.

2. Results are estimates

All quantities, dimensions, volumes, counts and costs shown by the App are estimates for general planning and budgeting only. Real material needs can differ because of waste, cutting, site conditions, mix designs, supplier packaging, workmanship, local building codes and prices that change over time. Always check quantities with your supplier and add a sensible margin before you order.

3. Not professional advice

The App does not provide engineering, structural, architectural or legal advice, and its results are not a contractor’s quote or a design approved for construction. Structural elements such as foundations, columns, beams, slabs and rebar must be designed and checked by a qualified engineer and approved where your local rules require it. Follow local building codes and safety rules.

4. Your prices and your data

The App does not contain built-in material prices. Any cost shown is calculated from the prices you enter, and you are responsible for checking them. Your projects, history and settings are stored only on your device. We cannot restore them if you delete the App, change devices, delete your data or if your device storage is cleared, unless you have exported a backup yourself.

5. Licence

We grant you a personal, limited, non-exclusive, non-transferable and revocable licence to download and use the App on devices you own or control, in line with these Terms and the rules of the store you got it from (the Apple Media Services Terms and Apple’s Licensed Application End User License Agreement, or the Google Play Terms of Service). You may use the App’s results in your own work, including commercial projects.

6. Acceptable use

You agree not to:

copy, modify, distribute, sell or rent the App or any part of it,
reverse engineer, decompile or try to extract the source code, except where the law expressly allows it,
interfere with the App’s advertising, for example by generating fake ad impressions or clicks,
use the App for any unlawful purpose.

7. Advertising

The App is free because it shows ads provided by Google AdMob. Ads are provided by third parties, and we are not responsible for their content or for the products and services they promote. How ad data is handled is explained in our Privacy Policy.

8. Intellectual property

The App, its design, code, icons and original text belong to Mert Korkmaz or its licensors and are protected by copyright and other laws. The MertApp name and logos may not be used without our permission. Third-party components, such as open-source libraries, are used under their own licences.

9. Updates and availability

We may update, change or remove features of the App, or stop offering it, at any time. Some updates may be needed to keep using the App. We do not promise that the App will always be available or free of errors.

10. Disclaimer

The App is provided “as is” and “as available”, without warranties of any kind, express or implied, including accuracy of results, fitness for a particular purpose and non-infringement, to the fullest extent the law allows. Nothing in these Terms limits any rights you have as a consumer that cannot be limited by law.

11. Limitation of liability

To the fullest extent the law allows, we are not liable for any indirect, incidental, special or consequential damages, including over- or under-ordered materials, extra costs, project delays, construction defects or loss of data, arising from your use of the App or from any decision made on the basis of its results. Our total liability for any claim relating to the App is limited to the amount you paid for it, which is zero. This does not exclude liability for death or personal injury caused by negligence, for fraud, or for anything else that cannot be excluded by law.

12. Apple-specific terms

If you downloaded the App from the Apple App Store: these Terms are between you and us, not Apple. Apple is not responsible for the App or its content, has no obligation to provide maintenance or support, and is not responsible for any product claims, legal compliance claims or intellectual property claims relating to the App. If the App fails to conform to any applicable warranty, you may notify Apple, and Apple’s only obligation is to refund the purchase price, if any. Apple and its subsidiaries are third-party beneficiaries of these Terms and may enforce them against you. You confirm that you are not located in a country subject to a US Government embargo, and that you are not on any US Government list of prohibited or restricted parties.

13. Termination

Your licence ends automatically if you break these Terms. You can stop using the App at any time by deleting it.

14. Governing law

These Terms are governed by the laws of the Republic of Türkiye, without regard to conflict-of-law rules. If you are a consumer, you also keep the protection of the mandatory laws of the country where you live, and you may bring claims in your local courts.

15. Changes to these Terms

We may update these Terms from time to time. The new version will be posted on this page with a new effective date. Continuing to use the App after a change means you accept the updated Terms.

16. Contact

Mert Korkmaz (MertApp)
Email: hezarfentech@gmail.com