Terms of service

Last updated: November 8, 2026

1. About these terms
2. Free and Pro
3. Your account
4. Subscription and billing
5. Cancelling
6. Refunds and withdrawal
7. Using the app
8. AI agents and your accounts
9. Your code
10. Acceptable use
11. Changes and availability
12. Warranty and liability
13. Ending
14. Law and disputes
15. Changes to these terms
16. Legal notice

1. About these terms

These terms are an agreement between you and [your full name or company name] (“Kalvyr”, “we”), the publisher of Kalvyr (see the legal notice). They apply when you download or use the Kalvyr desktop app, create a Kalvyr account or subscribe to Kalvyr Pro. Our privacy policy explains how we handle personal data.

If you use Kalvyr for a company, you accept these terms for that company and confirm you're allowed to.

2. Free and Pro

Kalvyr Free includes the architecture map, agent tracking, plans, activity, history and component previews. It's free and needs no account.

Kalvyr Pro adds agent chat, live preview of your running app, saved conversations and project and session management. It needs a Kalvyr account with an active subscription, signed in on each computer through your browser.

3. Your account

• You must be at least 15 years old, and old enough to enter a contract where you live, to create an account.
• Give a real email address and keep your password and your Google or GitHub sign-in secure. You're responsible for what happens with your account.
• An account is for one person. You can sign in Pro on several of your own computers, but don't share your account with others.
• If you think someone else used your account, change your password and sign the unknown computers out on your account page.

4. Subscription and billing

• Price: Kalvyr Pro costs US$9 per month. Sales tax or VAT is added where it applies, and the total is shown at checkout before you pay.
• Renewal: you're billed in advance when you subscribe, then automatically each month on the same date until you cancel.
• Payment: payments are handled by Stripe, which may act as the reseller of your subscription and handle tax. Your bank may charge conversion fees if your card isn't in US dollars.
• Failed payments: if a payment fails, Stripe retries it for a while. If it still fails, Pro stops until the payment goes through.
• Price changes: we'll tell you by email at least 30 days before a new price applies to you. If you don't agree, you can cancel before then.

5. Cancelling

You can cancel at any time: on your account page, choose Manage billing, then cancel your subscription. You can also reach it from Kalvyr with Manage subscription.

Pro keeps working until the end of the period you've paid for, then your computers switch back to Free. Your saved conversations stay on your computer. Apart from the 14-day refund below, we don't refund partial months.

6. Refunds and right of withdrawal

14-day refund in the EU and UK. If you live in the European Union or the United Kingdom, you can withdraw from your first Pro subscription within 14 days of subscribing, without giving a reason, and get a full refund. Email [support email address] from your account's email address, or send us any other clear statement. We refund you within 14 days, using the payment method you used, and Pro ends at that point.

Elsewhere, and after those 14 days, payments aren't refundable except where the law requires it. If something went wrong, such as being charged twice, write to us and we'll fix it.

7. Using the app

We give you a personal, non-exclusive, non-transferable right to install and use Kalvyr on your own computers, for Free and, while your subscription is active, for Pro. Kalvyr, its code, design and name belong to us.

You may not copy, sell, rent or redistribute Kalvyr, get around how Pro is unlocked, or reverse engineer the app, except where the law gives you that right.

8. AI agents and your accounts

• Kalvyr works alongside Claude Code and Codex, which you install and sign in with your own Anthropic or OpenAI account. Kalvyr doesn't provide AI models itself.
• Your use of those tools, their costs, usage limits and what they produce are governed by your agreement with Anthropic or OpenAI. Kalvyr Pro's price doesn't include any AI usage.
• AI agents can make mistakes and can change, create or delete files and run commands in your projects. Kalvyr shows you what they do and asks before actions that need approval, but you're responsible for what you ask them to do, what you approve, and for reviewing and testing the results.
• Use version control or backups for your projects.

9. Your code

Your projects, code and conversations are yours. Kalvyr processes them on your computer to show maps, previews and agent activity, and claims no rights over them. We never receive them, except anything you choose to send us yourself, for example in a support request.

10. Acceptable use

Don't use Kalvyr or our services to break the law or anyone's rights, to attack, overload or probe our services, to get around payment or account limits, or to resell access. We can suspend accounts that do.

11. Changes and availability

We keep improving Kalvyr, so features can change. If we remove a major Pro feature, we'll tell you and you can cancel with a refund for the unused part of your current month.

The Kalvyr app works on your computer even when our services are down. Pro needs to reach our account service now and then: if it can't, Pro keeps working for a few days. We aim for our services to be available, but can't promise they'll never be interrupted.

12. Warranty and liability

Kalvyr is provided “as is”. To the extent the law allows, we don't guarantee it will be error-free, or fit a particular purpose beyond what we describe.

To the extent the law allows, we aren't liable for indirect losses such as lost profits, lost data or business interruption, and our total liability to you is limited to what you paid us in the 12 months before the event.

Nothing in these terms limits liability that can't be limited by law, including for death or personal injury caused by negligence, for fraud or gross negligence, or your legal rights as a consumer, such as the legal guarantee of conformity for digital content and services.

13. Ending

You can stop using Kalvyr at any time. To close your account, cancel your subscription and email us. We may suspend or close an account that seriously or repeatedly breaks these terms, after warning you when we reasonably can. If we close your account without a good reason, we'll refund the unused part of your current month.

14. Law and disputes

These terms are governed by French law. If you're a consumer, you also keep the protection of the mandatory laws of the country where you live, and you can bring a claim in its courts.

If you have a problem, please write to us first: most issues can be fixed quickly. If you're a consumer and we can't solve it together, you can use, free of charge, the consumer mediator: [name, website and address of your consumer mediator]. Otherwise, the French courts have jurisdiction, subject to the rules that protect consumers.

15. Changes to these terms

We may update these terms. For changes that matter, we'll tell you by email or in the app at least 30 days before they apply. If you don't agree, you can cancel before they apply.

16. Legal notice

• Publisher: [your full name, or company name and legal form]
• Address: [postal address], France
• Registration: [SIREN / SIRET number, if you have one]
• Contact: [support email address]
• Publication director: [your full name]
• Hosting: Vercel Inc., 440 N Barranca Ave #4133, Covina, CA 91723, United States, [Vercel's phone number]