Terms of Use
Effective Date: September 4, 2026 · Last Updated: October 2, 2026
These Terms of Use are an agreement between you and Contractor School.
1. Acceptance
By downloading or using Clamp, or by using the free web estimator on clamppro.com, you agree to these Terms. If you do not agree, do not use the App or the estimator. Section 12 applies to the free web estimator; the other sections apply to the App.
2. Description of Service
Clamp is a local-first job-workflow app for residential contractors: lead scoring, design agreements, estimates, proposals, change orders, invoices, mileage tracking, time on site, receipts, photos, customer document signing, vendor bills and payments, job costing, an accountant export, and — on paid tiers — cloud backup, a web view, AI estimate drafting, and team features.
3. Subscription Tiers
Clamp is offered as Clamp Solo, Clamp Assistant, and Clamp Teams, each available monthly or annually. Higher tiers replace your current plan — Assistant replaces Solo, and Teams replaces Assistant or Solo — so you hold one plan at a time and are never billed for both. Billing is handled by Apple or Google. Subscriptions auto-renew unless cancelled at least 24 hours before the end of the current period. Refunds are governed by the applicable store's policy.
4. Free Trial
New subscribers may be eligible for a 1-month free trial on the Solo monthly plan, applied by Apple or Google as an introductory offer at the point of purchase. Trial eligibility is determined by the store. No trial is offered on Teams. Upgrading during a trial ends the trial and starts the new subscription immediately.
5. User Content and Data
You own your business data. Clamp is local-first, and you are responsible for maintaining backups of your data. If your plan includes cloud backup and you enable it, your data is also stored with us as described in the Privacy Policy; this does not change your ownership of it.
6. Acceptable Use
You may not use the App for unlawful purposes, reverse engineer it, or abuse the document signing, customer portal, or team invitation features.
7. AI Features
AI-generated drafts are suggestions. You are responsible for reviewing all content before sending it to a customer.
Improving AI estimates. By default, Clamp keeps a copy of the job descriptions you write, the drafts they produce, your corrections, and the job's ZIP code, and uses that copy to improve estimate accuracy, including to train and evaluate Clamp's own estimating models. We do not sell or share it. You may turn this off, and delete what has been collected, at any time in Settings → AI & Data. This is described in full in the Privacy Policy.
You keep ownership of your content. Nothing in this section gives Clamp ownership of your job descriptions or estimates, and turning the setting off does not change your rights to your own data.
7a. Financial Records and Job Costing
Clamp’s job costing, vendor balances, retainage tracking, and accountant export are operational tools. They record the costs, obligations, billings, and payments you enter, and derive job performance from them. They are not financial statements, they do not determine your taxable income, and they do not constitute accounting, tax, or legal advice. You are responsible for reviewing exported records with your accountant or tax preparer before relying on them for any filing.
Amounts Clamp reports as incurred reflect what you have recorded. The accuracy of your job costs depends on the completeness of the records you enter.
8. Document Signing
The App provides electronic signature functionality. You are responsible for ensuring electronic signatures are legally sufficient for your purposes in your jurisdiction.
9. Teams
A Clamp Teams subscription covers up to 10 seats in your business. You are responsible for the people you invite and for having a lawful basis to enter their contact details and hold their work records. Jobsite links for outside subcontractors do not count toward your seats.
10. Disclaimers, Limitation of Liability, Indemnification
The App is provided "as is." To the maximum extent permitted by law, our aggregate liability is capped at the fees you paid in the twelve months preceding the claim.
11. Termination, Governing Law, Changes, Contact
Governing law. These Terms are governed by the laws of the State of Ohio, without regard to its conflict-of-laws rules. Any dispute not subject to another mandatory forum under applicable law will be brought in the state or federal courts located in Cuyahoga County, Ohio. This does not deprive you of protections that apply to you under the law of your state of residence.
Rights that cannot be waived. Nothing in these Terms limits any rights or remedies that cannot lawfully be waived or limited. If any part of these Terms is found unenforceable, the rest remains in effect.
We may update these Terms from time to time. Questions: [email protected].
12. Free Web Estimate
The free estimator at clamppro.com/estimate turns a job description into an automated estimate draft. It is offered free of charge, and these points apply to it:
- A planning estimate, not a price. A draft is an automated estimate of typical direct job costs (labor and materials) at national-average United States rates. It is not a bid, quote, offer, appraisal, or guarantee of what any contractor will charge, and it does not bind any contractor, including Clamp. Local prices, permits, taxes, site conditions, access, product selections, and contractor overhead and profit can make the real cost substantially different.
- Not professional advice. A draft is not engineering, architectural, code, permit, legal, or tax advice, and it does not assess structural conditions or hazardous materials such as asbestos, lead paint, or mold. It does not determine whether work requires a licensed contractor, permit, inspection, engineer, architect, or other professional. Have a qualified professional evaluate your project before relying on any figure.
- Automated and imperfect. Drafts are produced by AI and automated pricing. They can misread a description, leave out work, or include work you did not ask for. Review the scope shown with every draft. Sometimes the estimator will decline to price a description it cannot estimate reliably.
- Your description. You confirm you have the right to submit what you type. Do not include personal details such as addresses, phone numbers, or access codes. We use what you submit, including to train and evaluate Clamp's own estimating models, as described in section 11 of the Privacy Policy.
- Fair use. Each email address and connection may request a limited number of free drafts. You may not submit requests automatically or in bulk, copy or resell drafts or rates at scale, or bypass those limits. You may not intentionally interfere with the estimator, probe it for confidential system information, or use it to generate deceptive or fraudulent materials.
- No warranty; limitation of liability. The free web estimate is provided "as is" and "as available." To the fullest extent permitted by applicable law, we disclaim warranties relating to the accuracy, completeness, availability, or fitness of a draft for a particular project, and we will not be liable for indirect, incidental, special, consequential, or lost-profit damages arising from use of the free web estimate. For claims relating solely to the free web estimate, our aggregate liability will not exceed $100. These limitations do not apply where applicable law does not permit them.
We may change, limit, or withdraw the free estimator at any time.