Terms of Service

01The agreement

By installing, opening or using Mussi Pulse (the app, bundle identifier tech.mussi.pulse), the optional Pulse Cloud sync service, or the website at pulse.mussi.tech (together, the Service), you agree to these terms. If you do not agree, do not use the Service.

The Service is provided by Marcelo Mussi, an independent developer trading as mussi.tech, based in Brazil (we, us). Your privacy rights are described in the Privacy Policy, which forms part of this agreement.

02What the Service is

Mussi Pulse is a local-first personal management application for macOS, Linux and Windows. It stores your data on your own device, encrypts it with a key only you hold, and optionally connects to third-party services you choose so it can show your work in one place.

The app is currently in private beta. It is under active development, features may change or be removed, and it is not yet generally available. Beta software should be treated as beta software: keep your own backups of anything you cannot afford to lose.

03Who may use it

You must be at least 18 years old and legally able to enter into this agreement. If you use the Service on behalf of a company, you confirm you are authorised to bind that company to these terms.

04Your licence

We grant you a personal, non-exclusive, non-transferable, revocable licence to install and use the app for your own purposes — personal or professional — for as long as these terms are respected.

You agree not to:

• Resell, sublicense, rent or redistribute the app, or offer it to third parties as a hosted service.
• Reverse engineer, decompile or disassemble it, except to the extent that applicable law expressly permits it despite this restriction.
• Remove or obscure any copyright, trademark or attribution notice.
• Use the Service to break the law, infringe anyone's rights, or process data you have no right to process.
• Attack the Service — probing, scanning, overloading, or attempting to access accounts or data that are not yours. Good-faith security research reported privately is welcome and is not a breach of this clause.
• Use the Service to send unsolicited bulk messages, or in a way that violates the terms of any third-party service you connect to it.

05Your data, your keys

Your content belongs to you. We claim no ownership over anything you create, import or connect. We do not use your content to train models, build advertising profiles, or for any purpose other than operating the features you use.

You are responsible for your encryption key, your PIN and your recovery code. Because the design gives us no copy of your key, losing every trusted device together with your recovery code makes your encrypted data permanently unrecoverable — by you and by us alike. This is a security guarantee, not a bug, and no support request can undo it.

You are also responsible for the lawfulness of the data you put into the app. Where you use it to process other people's personal data — clients, colleagues, correspondents — you act as the controller of that data and must have your own basis for doing so.

06Third-party services you connect

The app can connect to services such as Google Calendar, GitHub, mail providers, messaging bridges, cloud providers and AI providers. Each connection is initiated by you, using your own credentials, and is governed by that provider's own terms and privacy policy in addition to these terms.

You are responsible for complying with those terms and for having the right to connect the accounts you connect. We are not responsible for the availability, accuracy, pricing or behaviour of third-party services, nor for what happens if one of them changes its API, its rules, or its mind.

07AI features

AI-assisted features are optional and only run when you invoke them. When you do, the relevant content is sent to the AI provider you connected — currently Anthropic — for that request, as described in the Privacy Policy.

AI output can be wrong, incomplete or confidently mistaken. It is a draft for you to check, never a decision. You remain responsible for reviewing anything the assistant produces before you act on it, publish it, or send it to someone else — particularly where money, code in production, legal obligations or other people are involved. We are not liable for outcomes that follow from unreviewed AI output.

08Availability and changes

The app runs on your machine and keeps working whether or not our servers do. Pulse Cloud sync, being a network service, is offered without any uptime guarantee or service level agreement while the Service is in beta.

We may add, change, suspend or discontinue features. Where a change would remove functionality you rely on or materially affect stored data, we will give reasonable notice in the app or by email and, where practical, a way to export your data first.

09Fees

The private beta is currently offered at no charge. Paid plans may be introduced later — for example for hosted sync. If that happens, you will be told before any charge applies, and continuing to use a paid feature after that notice is what makes it billable. No plan starts charging silently.

Costs you incur with third parties — an AI subscription, a cloud provider, a domain — are yours and are billed by them, not by us.

10Intellectual property

The app, its source code, design, name, logo and documentation are owned by Marcelo Mussi and protected by copyright and trademark law. These terms grant you a licence to use the software; they do not transfer any ownership. Third-party open-source components remain under their own licences, which are honoured and reproduced with the app.

If you send feedback, bug reports or feature ideas, we may use them to improve the Service without obligation or compensation to you. You keep any rights you already had in what you sent.

11Disclaimer of warranties

The Service is provided “as is” and “as available”, without warranties of any kind, whether express or implied, including merchantability, fitness for a particular purpose, non-infringement, or uninterrupted or error-free operation. You use it at your own risk, and you are responsible for keeping backups of important data.

Nothing in these terms excludes rights you have that cannot be excluded by law — including consumer rights under the Brazilian Consumer Protection Code (Lei 8.078/1990) where it applies to you.

12Limitation of liability

To the maximum extent permitted by law, we are not liable for indirect, incidental, special, consequential or punitive damages, nor for lost profits, lost revenue, lost business, or lost or corrupted data arising from your use of the Service — including data made unrecoverable by the loss of your own encryption key or recovery code.

Where liability cannot be excluded, it is limited in aggregate to the greater of the amount you paid us for the Service in the twelve months before the claim or USD 50.

13Ending the agreement

You may stop at any time: disconnect your integrations, export what you want to keep, and uninstall the app. Deleting the local database and its keychain entries removes your data from that machine completely.

We may suspend or terminate access if you materially breach these terms — in particular the acceptable-use clauses — or where required by law. Where the breach can be fixed, we will say what is wrong and give you a reasonable chance to fix it before cutting access. Sections that by their nature should survive termination (intellectual property, disclaimers, liability, governing law) survive it.

14Governing law

These terms are governed by the laws of the Federative Republic of Brazil. Disputes will be resolved by the courts of Brazil. If you are a consumer, you may also bring proceedings in the courts of your own place of residence where the law gives you that right, and mandatory consumer protections in your country continue to apply.

15Changes to these terms

We may update these terms as the Service evolves. The date at the top of this page shows the last substantive revision, and material changes are announced in the app or by email before they take effect. Continuing to use the Service afterwards means you accept the updated terms; if you do not, stop using the Service and export your data.