Terms of Use | Stag Works

Last updated: September 16, 2026

1. Scope

These Terms of Use govern your use of the RenoStack app for iOS and Android and of the RenoStack web application at renostack.stagworks.de (together the "app"), a service of Maximilian Rosnauer und Benjamin Seeger GbR (StagWorks). By downloading the app, creating an account or using the app, you agree to these terms. If you are under 18, you confirm that your legal guardians have agreed to these terms.

2. Licence

We grant you a simple, revocable, non-transferable right to use the app for your personal renovation and construction projects. You may not copy, distribute, decompile or commercially reuse the app or parts of it, except where mandatory law permits.

3. Account and guest mode

You need an account to sync across devices, share projects and buy RenoStack Pro. You are responsible for keeping your credentials confidential. In guest mode (without an account) your data is stored on the device only; it is lost when you sign out or uninstall the app.

4. RenoStack Pro

Free tier. The app can be used free of charge. The free tier is limited to one project; sharing projects, cloud storage of receipts and documents, and other features marked "Pro" in the app require RenoStack Pro. The current scope is shown in the app.

Plans and prices. RenoStack Pro is available as a monthly subscription, an annual subscription and a one-time purchase with no term ("Lifetime"). The prices shown to you before purchase in the App Store or on Google Play apply, in each case including VAT.

Purchase and billing. You buy RenoStack Pro in the app through your Apple or Google account; your contractual partner for the purchase and billing is the respective store (Apple or Google). Purchases are currently not possible in the web application. A Pro purchase applies to your account on all platforms, i.e. in the app and in the web application.

Renewal and cancellation. Monthly and annual subscriptions renew automatically for the chosen term unless you cancel at least 24 hours before the end of the current period — in the subscription settings of your App Store or Google Play account, or in the app in your profile under Manage subscription. After cancellation, Pro remains active until the end of the paid period; there is no pro-rata refund. The Lifetime purchase does not renew and does not need to be cancelled.

Withdrawal and refunds. For purchases in the App Store and on Google Play, Apple's or Google's withdrawal and refund rules apply; refunds are requested directly from the respective store.

Cloud storage. With RenoStack Pro, receipts, quotes and project documents are backed up to our cloud storage. Files are limited to 25 MB each and projects to 100 documents. If your Pro access lapses, attachments already uploaded remain accessible to you and your project partners; new uploads to the cloud require Pro again. Attachments are deleted when you delete them, the associated entry, the project or your account.

Price changes. Price changes apply to future billing periods only and are announced in advance; in the case of an increase you can cancel the subscription before it takes effect. Features that already exist will not be moved behind a paywall without prior notice.

5. Sharing projects

You can add project partners to a project via an invite link. All members of a project see its budgets, costs, expenses and documents and, depending on their role, can create and edit entries. You are responsible for whom you pass an invite link to; treat it like a password. The owner of a project can remove members and transfer the project; any member can leave a project at any time.

6. Your content

You retain all rights to the data, photos and documents you store in the app. You grant us the right to store and process this content and to display it to the members of your projects to the extent necessary to operate the app. You warrant that you only upload content for which you hold the necessary rights and that does not infringe third-party rights or the law. We may remove content and suspend or terminate accounts that violate these terms.

7. Data & availability

Your project data is stored on your device and synced to our cloud database so that it is available across devices and in the web application, and can be shared with project partners. With RenoStack Pro, receipts and attached documents are also backed up to the cloud. As a free user, your attachments stay on your device only — if you change or lose your device, or uninstall the app, they are lost; we therefore recommend using the export function in your profile regularly. We accept no liability for the loss of locally stored data.

We aim for high availability but do not guarantee it. We reserve the right to develop the app further, change features or discontinue the service at any time; if we discontinue it, we will inform you in good time so you can export your data. You can delete your account at any time in your profile.

8. Liability

We are liable without limitation for intent and gross negligence, and for injury to life, body or health. In the case of slightly negligent breach of material contractual obligations (cardinal obligations), liability is limited to the foreseeable damage typical for this type of contract. Otherwise, liability for slight negligence is excluded.

9. No advice, no warranty for calculations

All figures in the app are estimates based on your own entries. Budgets, forecasts, remaining budget, cost splits and settlement amounts are calculated solely from the data you or your project members have entered. We give no warranty as to their accuracy, completeness or timeliness.

RenoStack does not provide financial, tax, legal or construction advice. The app does not review, assess or compare contractor quotes, does not judge whether a price is reasonable, and makes no statement about whether a project is affordable. Indicators such as "loan required" are purely arithmetic results and are not a recommendation to take out or refrain from financing.

You remain solely responsible for your financial, contractual and construction decisions, and for checking the figures shown in the app against invoices, quotes and contracts. For tax, legal or structural questions, please consult a suitably qualified professional.

To the maximum extent permitted by applicable law, the app is provided "as is" and "as available", without warranties of any kind, whether express, implied or statutory, including but not limited to the implied warranties of merchantability, fitness for a particular purpose, accuracy and non-infringement. Nothing in this section limits or excludes the mandatory liability set out in section 8 above, any liability for death or personal injury caused by our negligence, for fraud, or any other liability that cannot be excluded under applicable law; where a jurisdiction does not allow the exclusion of certain warranties, the above exclusions apply only to the extent permitted there.

10. App stores & third parties

These Terms of Use are concluded between you and us only, not with Apple Inc. or Google LLC. The app uses Firebase Authentication for sign-in and, where applicable, "Sign in with Apple" and "Google Sign-In"; for purchases it uses the App Store or Google Play; the respective providers' terms apply in addition. We alone are responsible for the app, its content and support; Apple and Google have no obligation to furnish maintenance or support services. If the app fails to conform to any applicable warranty, you may notify Apple, and Apple may refund the purchase price to you. To the maximum extent permitted by law, Apple has no other warranty obligation whatsoever. We, not Apple or Google, are responsible for addressing any claims relating to the app — including product liability, any failure to conform to legal requirements, consumer protection or data protection law, and claims arising from infringement of third-party rights. You represent that you are not located in a country subject to a US embargo or designated by the US government as a "terrorism supporting country", and that you are not listed on any US list of prohibited or restricted parties. Apple Inc. and its subsidiaries are third-party beneficiaries of these Terms of Use and are entitled to enforce them against you.

11. Changes to these terms

We may amend these Terms of Use when the app or legal requirements change. We will inform you of material changes in the app or by email at least 14 days before they take effect. If you do not agree with a change, you can delete your account; if you continue to use the app afterwards, the amended version applies.

12. Final provisions

The law of the Federal Republic of Germany applies, excluding the UN Convention on Contracts for the International Sale of Goods. Mandatory consumer protection provisions of your place of habitual residence remain unaffected. We are neither willing nor obliged to take part in dispute resolution proceedings before a consumer arbitration board (§ 36 VSBG). Should individual provisions be invalid, the validity of the remaining provisions remains unaffected.