Terms of Service

Updated November 6, 2026

These terms are an agreement between you and the developer and operator of EchoAgent (“we”, “us”). They cover the EchoAgent app, the echo model service, your account and our website. By downloading, signing in to or using EchoAgent you agree to them and to the Privacy policy. If you don’t agree, don’t use EchoAgent.

1. The service

EchoAgent is a voice assistant for the Mac. It can answer questions and act on your Mac: read and write files, run commands, capture windows you ask about, and start tasks in tools such as Codex and Claude Code. It can use either echo, the model service we provide after you sign in, or a model provider you configure with your own API key. echo’s models are run by third-party providers, currently DeepSeek V4.1 Flash by DeepSeek, Claude Haiku 5.5 by Anthropic, and OpenAI’s GPT and Google’s Gemini models, which we reach through a third-party API service provider. Which of them you can use, and how much, depends on your pass and on the country or region you are in, and we may add, change or remove models at any time. EchoAgent is under active development; features may change, be limited or be removed at any time.

2. Your account

• You must be at least 14, and old enough to agree to these terms where you live, or have a guardian’s consent.
• Give accurate sign-in details and keep access to your email, phone, Google or WeChat account and your Mac secure. You are responsible for everything done with your account.
• One account is for one person. Don’t create accounts in bulk, share, sell or transfer accounts, or sign in as someone else.
• Tell us promptly if you think someone else is using your account.

3. echo usage limits and passes

• Without signing in, each Mac can try echo with a small one-time allowance. It doesn’t reset; once it’s used up, sign in to keep going.
• Signed-in accounts can use echo for free within usage limits. Usage is measured by the resources echo uses to handle your requests, not by how many requests you make: tasks with more content or more steps use more, and the same request may use a different amount at different times. The app shows how much of each limit you’ve used, as a percentage, and when it resets.
• There are two free limits. The 5-hour limit starts with your first message and resets 5 hours later; your next message after that starts a new one. The weekly limit starts with your first use and resets at the same time every 7 days. When either limit is reached, echo pauses until that limit resets, even in the middle of a task. You can add your own API key and keep going at any time.
• Free accounts on the same Mac share that Mac’s free limits. The limits have no cash value and cannot be transferred, carried over or exchanged; unused allowance doesn’t roll over to the next period.
• Free usage is a trial, provided at our discretion. We may change the size of the limits, how usage is measured, how often the limits reset, the models behind echo and its availability, or pause or end free usage, for everyone or for particular accounts or Macs, including when overall demand is too high, at any time and without notice.
• Getting more free use by creating several accounts, changing device identifiers, automating requests, reselling access, or otherwise getting around the limits is prohibited and may lead to suspension.

Passes.

• A pass is a one-time purchase. While it lasts (for example 30 days), your account’s 5-hour and weekly limits are several times the free ones. The multiple, the number of days and the price are those shown when you buy. A pass does not renew automatically; when it ends you go back to the free limits. Buying the same plan again adds its days after the current end date.
• Payments are processed by Stripe, by card in Australian dollars (older versions of the app charge cards in US dollars) or by Alipay in Chinese yuan. WeChat Pay isn’t available yet; the payment methods you can use are those shown when you buy. We never receive or store your card or payment account details. Prices, including any limited-time prices, may change at any time; changes don’t affect passes already bought.
• A pass belongs to the account that bought it, cannot be transferred and isn’t shared with other accounts on the same Mac. Its usage is measured the same way and resets on the same 5-hour and weekly schedule, and unused allowance doesn’t carry over. Very long or costly tasks use it up faster; when a limit is reached, echo pauses until it resets, and that is not a ground for a refund. Pausing free usage doesn’t affect passes.
• A pass also includes Live voice mode, the cloud voice for spoken answers, up to a daily number of characters that depends on the plan; the allowance resets at midnight Beijing time and doesn’t carry over. Without a pass, or once the day’s allowance is used up, spoken answers use the voice built into your device. The cloud voice depends on a third-party provider; we may change the voice or the provider, and if it is unavailable the built-in voice is used instead. That alone is not a ground for a refund.
• A pass starts working as soon as it is paid for and is a digital service already delivered, so it is not refundable on request, except where the law requires otherwise. If you were charged twice, paid but the pass didn’t turn on, or couldn’t use echo for a long time because of us, contact us through Send Feedback; after checking we will refund or make it up to you. A refunded pass ends immediately.
• If your account is suspended for breaking these terms, the unused part of a pass is not refunded, except where the law requires otherwise. If we stop providing echo, we will refund the unused days of active passes in proportion.

4. Acceptable use

You must not use EchoAgent, directly or through its tools, to:

• break any law, including laws on generative AI, data protection, intellectual property and export control;
• create or spread content that is illegal, harmful, fraudulent, defamatory, harassing, sexual content involving minors, violent extremism, or that infringes others’ rights;
• access systems, accounts or data you aren’t authorized to access, or develop or spread malware;
• attack, overload, probe or disrupt our servers, bypass authentication, usage limits or the regions where echo’s models are offered (for example with a VPN or proxy), or reverse engineer, scrape or resell the echo service;
• use echo to build a competing model or service, or pretend AI output was written by a person where that would mislead.

We, or the model providers, may refuse, filter or stop requests that appear to break the law or these terms.

5. AI output

Answers and actions are generated automatically by AI models and can be wrong, incomplete, out of date or inappropriate. They are not professional advice (legal, medical, financial or otherwise). Check anything important before relying on it. You are responsible for how you use the output, including anything you publish or send.

6. Actions on your Mac

EchoAgent acts with your macOS permissions. It can change or delete files, run commands, and start tasks in other tools that may themselves change files or send data. Its working folder is not a sandbox. You decide which permissions to grant and whether tools run automatically or ask for approval first, and you are responsible for reviewing what it does. Keep backups of important data. To the fullest extent the law allows, we are not responsible for data loss, damage, charges or other consequences of actions carried out at your request or under the approval settings you chose.

7. Third-party services

EchoAgent works with services we don’t control: the model providers behind echo (Anthropic, DeepSeek, OpenAI and Google) and the API service provider we use to reach OpenAI and Google, the provider of your own API key, Codex, Claude Code, ChatGPT, Claude, Google, WeChat, and our email and SMS providers. Their terms and privacy policies apply to your use of them, you are responsible for any fees they charge, and we are not responsible for their availability, content or conduct.

8. Your content

You keep your rights in what you send and in the output you receive, to the extent the law allows. You give us and our service providers permission to transmit and process it as needed to provide EchoAgent, as the Privacy policy describes. You confirm you have the rights and permissions needed for what you send, including other people’s personal information.

9. Our rights

EchoAgent, its name, design, code and website are ours or our licensors’. We grant you a personal, non-exclusive, non-transferable, revocable licence to use the app for its intended purpose under these terms. Open-source components are covered by their own licences. If you send us feedback or suggestions, we may use them freely without obligation to you.

10. Suspension and ending

You can stop using EchoAgent and ask us to delete your account at any time. We may suspend or end your access to echo, your account or the service, in whole or in part, with or without notice, if we believe you have broken these terms, to prevent abuse, fraud or harm, when the law requires it, or if we stop providing the service. Sections that by their nature should continue, including 5 to 9 and 11 to 14, continue after access ends.

11. No warranties

EchoAgent and echo are provided “as is” and “as available”. To the fullest extent the law allows, we make no warranties of any kind, express or implied, including that the service will be uninterrupted, error-free, secure, accurate or fit for a particular purpose, or that data will not be lost.

12. Limitation of liability

To the fullest extent the law allows, we are not liable for any indirect, incidental, special, consequential or punitive damages, or for lost profits, revenue, data, goodwill or business opportunities, arising from or related to EchoAgent, however caused. Our total liability for all claims related to EchoAgent is limited to the amount you actually paid us for the service in the 12 months before the claim. If you have only used free features, that amount is zero. None of this limits liability that cannot be limited by law.

13. Indemnity

To the extent the law allows, you will compensate us and our service providers for claims, losses and reasonable costs (including legal fees) arising from your breach of these terms, your content, or your misuse of EchoAgent.

14. Changes, law and contact

• We may change these terms. We update the date at the top and, for significant changes, tell you in the app or on this website. If you keep using EchoAgent after a change takes effect, you accept the updated terms.
• These terms are governed by the laws of the People’s Republic of China, excluding its conflict-of-laws rules. Disputes should first be resolved through negotiation; failing that, they go to a competent court where we are located, unless the law of your place of residence requires otherwise.
• If any part of these terms is unenforceable, the rest remains in effect. Our not enforcing a term is not a waiver.
• Contact us through Settings → About → Send Feedback.