Terms of Use

Last updated: 7 November 2026

These terms apply when you download or use Jobsite Calc: Construction, an app from Itworked Systems, a company registered in Türkiye. By using it, you agree to them. If you downloaded the app from Apple's App Store, Apple's standard license agreement applies as well.

Using the app

The app is free to download, and the feet-inch calculator, the concrete slab calculator and the last five history entries are free to use. We give you a personal right to use it on devices you own or control, for your own work or projects, including paid work. Please don't copy, resell or redistribute the app itself.

Jobsite Calc Pro

Jobsite Calc Pro unlocks the other calculators (footings, columns, steps, area and slope), the materials list, saved projects, PDF estimates and the full history. It is offered as a yearly subscription (with a 7-day free trial for new subscribers), a monthly subscription, or a one-time lifetime purchase. The app shows the exact price in your currency before you buy.

Payment is charged to your App Store or Google Play account when you confirm the purchase, or when a free trial ends.
Subscriptions renew automatically for the same period and price unless you cancel at least 24 hours before the end of the current period. Your account is charged for the renewal within the 24 hours before the period ends.
You can manage or cancel a subscription in your App Store account settings or in Google Play under Payments & subscriptions. Cancelling stops the next renewal; Pro stays on until the end of the period you paid for. If you cancel during a free trial, you are not charged.
Refunds are handled by Apple or Google under their rules. Your legal rights as a consumer are not affected.
Restore purchases (in Settings and on the Pro screen) brings Pro back on a new phone with the same store account.

Results are estimates

We test the calculations carefully, but the results depend on the sizes you enter and on assumptions printed in the app, such as bag yields (an 80 lb bag of premixed concrete making about 0.60 cubic feet), paint coverage and waste allowances. Real materials vary by product and site. Check your measurements, your supplier's figures, the product labels and the building codes that apply to you before you cut, pour, build or order. The app is not a substitute for an engineer or for professional advice on structural work.

Your data

Your history, materials lists and projects are saved on your phone only. If you delete the app or lose your phone, they are gone and we cannot restore them. Our Privacy Policy explains more.

The app is ours

The app, its design and its name belong to Itworked Systems.

Our responsibility

We provide the app as it is and cannot promise it will always be free of errors. As far as the law allows, we are not responsible for indirect losses, wasted materials or other losses caused by relying on a result. Nothing in these terms limits responsibility that the law does not allow us to limit, or your rights as a consumer.

Changes to these terms

If we change these terms, we update this page and the date at the top.

Law

These terms are governed by the laws of the Republic of Türkiye, and disputes go to the competent courts and enforcement offices of Türkiye. If you are a consumer, you also keep the protection of the mandatory laws of the country where you live, and you can take a dispute to the courts or consumer bodies there.