When you get Fiume from the App Store, Apple's Licensed Application End User License Agreement also applies. Apple Standard EULA

Fiume Terms of Use

Last Updated: October 25, 2026
Effective Date: October 25, 2026

Fiume is provided by Hecara and operated by Zhang Yuxi (“we,” “us,” “Hecara,” or “Fiume”).

These Fiume Terms of Use (“Terms”) apply to your access to and use of the Fiume app (including the Apple Watch app) and related services (the “Service”). Before creating an account, subscribing, or continuing to use the Service, please read these Terms and the Fiume Privacy Policy carefully.

By creating an account or using the Service, you agree to be bound by these Terms. If you do not agree, do not use the Service. Acknowledging the Fiume Privacy Policy does not mean you consent to every personal information processing activity; we process personal information on the legal bases required by applicable law and will ask for separate consent where it is needed.

Questions: [email protected]

1. Eligibility and Accounts

1.1 Minimum Age

You must be at least 13 years old to use Fiume.

If the law where you live requires a higher age to consent to personal information processing, enter into a contract, or use similar online services on your own, you must meet that age or obtain valid authorization from a parent or legal guardian where applicable law requires it.

If you have not reached the age of majority where you live, your parent or legal guardian should read and agree to these Terms to the extent required by applicable law and appropriately supervise your use.

1.2 Sign in with Apple

Fiume currently offers account sign-in only through Sign in with Apple. You are responsible for managing your Apple Account and related sign-in credentials in accordance with Apple’s rules.

You must not impersonate others, access another person’s account without authorization, or otherwise circumvent account or security mechanisms.

1.3 Account Responsibility

You are responsible for activity that occurs through your account, unless applicable law provides otherwise or the activity was not caused by you.

If you notice unauthorized access to your account or another security risk, please contact us promptly at [email protected].

1.4 Region

You need to choose a region for your account. Your region determines which group of providers handles text AI features, as described in the Fiume Privacy Policy. Please choose the region where you actually are; you can change it in Settings.

2. The Fiume Service

Fiume is an app for Memos, Journal entries, voice notes, content organization, attachment management, and AI-assisted features, including the AI assistant Fio and conversations with sages.

After you sign in, your Memos, Journal entries, folders, attachments, conversations, and related states and data sync with your account and are also stored on your device for offline use. When connectivity returns, the app continues syncing changes.

We may update, improve, add, adjust, or discontinue features. For material changes that substantially affect paid benefits or core ways you use the Service, we will give advance or in-app notice where reasonably practicable, except where urgent security, legal, or technical reasons require an immediate change.

The Service may be temporarily unavailable because of maintenance, network issues, third-party infrastructure or AI providers, force majeure, or other reasonable causes. We take reasonable steps to keep the Service stable, but we do not guarantee that it will always be uninterrupted or error-free.

3. Your Content

3.1 Content Rights

You keep the rights you lawfully hold in Memos, Journal entries, recordings, images, attachments, prompts, and other content that you create, upload, or store in Fiume (“User Content”).

Except as necessary to provide the Service, Hecara does not take ownership of User Content.

You grant Hecara a non-exclusive, limited license, only as necessary to provide and operate Fiume, to technically store, copy, sync, transmit, display, and process your User Content, and to allow service providers that supply infrastructure, storage, AI, speech recognition, search, or other necessary technical services to Fiume to process that content for the same purposes. This license ends when the relevant content or your account is deleted, except for limited records that must be retained by law.

3.2 Your Responsibility for Content

You must have the right to create, upload, store, or process your content, and you must not use Fiume to infringe the intellectual property, privacy, or other legal rights of others, or to engage in unlawful activity.

If you record other people’s voices, or use Fio to handle other people’s contact details, events, or similar information, you must follow applicable law and obtain their consent where the law requires it.

3.3 Locked Folders and App Lock

Locked Folders and App Lock are Face ID checks on your device that keep someone with access to your device from opening that content directly.

A folder’s locked state is stored only on the current device and does not sync to your other devices. Content in a Locked Folder has no additional encryption; it syncs and is stored on our servers like other content. See the Fiume Privacy Policy for details.

For especially important materials, we recommend keeping other backups or exported copies that you control.

4. AI Features

4.1 AI Data Consent

Fiume’s AI features need to send your content to third-party AI providers for processing. Before you use an AI feature for the first time, Fiume asks for your consent. If you do not agree, you can still use non-AI features such as Memos and the Journal. You can turn this consent off in Profile at any time.

After you agree:

  • when you use an AI feature, Fiume sends the content needed for that request;
  • to complete your request, Fio may search and read your Memos, your Journal entries if you allow it, its long-term memory, and data from the device connectors you have connected, and send that content to AI providers;
  • when you finish editing a Memo without a title, Fiume automatically uses AI to generate a title, and when you finish a Journal entry, Fiume automatically uses AI to generate mood and topic tags.

Fiume does not send your whole library to AI providers just because you store Memos or Journal entries in the app.

4.2 AI Providers

Text AI requests are forwarded by an AI gateway that Fiume operates to model providers. These currently include Google (Gemini on Vertex AI), OpenAI, and xAI, and, mainly for accounts whose region is mainland China, DeepSeek and Volcano Engine. Transcription and web search also use third-party providers. The Fiume Privacy Policy describes each provider, where processing happens, and how data is retained.

Fiume stores conversations, long-term memory, Journal tags and insights, and similar results in your account so you can keep using them and sync them across devices. You can delete this content.

4.3 Actions Fio Takes for You

At your request, Fio can create or edit Memos, move Memos to Trash, and manage folders in Fiume. After you connect the corresponding connector, it can also create, edit, or delete items in Calendar, Reminders, and Contacts, or insert photos into a Memo.

  • Device connectors are off by default and require you to connect them and authorize access in iOS.
  • You can set each capability to Allow, Ask, or Don’t Allow. Changing capabilities default to Ask: Fio asks for your permission before creating an item, and once you allow it in a conversation, it does not ask again in that conversation; before every edit or deletion, Fio shows you the exact change for you to confirm. If you set a capability to Allow, Fio carries out those actions without asking.
  • You can undo a change Fio has just made from the conversation, but some actions cannot be undone, such as deleting “this and future occurrences” of a repeating event.

You should review the changes Fio proposes before confirming them, and you are responsible for the actions you confirm or set to Allow. To the extent permitted by applicable law, Hecara is not liable for indirect losses arising from actions Fio carries out within the permissions you have given but whose result is not what you expected.

Fio never reads the contents of your photos and never writes any data to the Health app.

4.4 Web Search

Fio can search the web by sending your search query to a third-party search service and using the results in its answer. Search results come from third-party websites, and Hecara is not responsible for their accuracy, legality, or availability.

4.5 AI Output

AI output is generated automatically by models and may be incomplete, inaccurate, outdated, or wrong. You should verify important information yourself.

  • Content from Fio, sages, and Journal insights is not medical, mental health, legal, financial, tax, or other professional advice, and does not replace the judgment of a doctor, therapist, lawyer, or other professional.
  • Fio’s analysis of Health data is not a medical diagnosis. For symptoms, medication, or treatment, consult a doctor.
  • Sages are AI characters inspired by historical figures. Their answers do not represent the actual views of those figures.
  • If you are in crisis or thinking about harming yourself or others, contact your local emergency services or a crisis hotline right away. Do not rely on Fiume for help.

To the extent permitted by applicable law, Hecara does not guarantee that any AI output is unique, eligible for copyright protection, dissimilar to output generated for others, or free of third-party rights. You are responsible for how you use, publish, or rely on AI output.

5. Subscriptions, Credits, and Payments

5.1 App Store Subscriptions

Fiume Pro is purchased and managed through the Apple App Store, with monthly and yearly plans. Prices, subscription periods, renewal terms, and other purchase information are those shown in the App Store at the time of purchase.

Subscriptions renew automatically unless you turn off auto-renewal at least 24 hours before the end of the current period. You can view or cancel your subscription through Apple’s subscription management.

5.2 Free Trials

Eligible users may receive a free trial when they first subscribe. Trials are currently 3 days for the monthly plan and 7 days for the yearly plan, as shown on the purchase screen. Apple determines trial eligibility. If you do not cancel before the trial ends, your paid subscription to the plan you chose starts automatically.

5.3 Credits and Allowances

Some AI features use Fiume credits:

  • free users receive free credits each calendar month (based on Singapore time), in the amount shown in the app;
  • Pro users receive credits under their plan: once per billing period for the monthly plan, and every 30 days for the yearly plan;
  • credits not used by the end of a grant period expire and do not carry over to the next period.

Some features are counted by number of uses or duration instead of credits, such as Journal insights, Weekly Insights (Pro only), web search, and transcription minutes. Allowances for each feature are shown in the app. We may adjust allowances based on how the Service operates and will show the adjusted allowances in the app.

Unless applicable law requires otherwise, credits represent only a service allowance for designated Fiume features. They have no cash value, cannot be redeemed for cash, and may not be transferred or traded between accounts.

5.4 Redemption Codes

We may offer membership or other benefits through redemption codes. The benefits and validity period of a code are as described when it is issued. Codes cannot be exchanged for cash or resold.

5.5 Refunds

Refunds for App Store purchases are decided and processed by Apple under its policies and procedures. Hecara does not directly process App Store payment refunds.

If Apple refunds a subscription, we may take back the credits and benefits provided under it. If a refund leaves your credit balance negative, you may be unable to use AI features until the balance is restored.

5.6 Account Deletion and Subscriptions

Deleting your Fiume account does not automatically cancel a subscription you started through the Apple App Store.

If you do not want your subscription to renew or incur further charges, cancel it separately through Apple’s subscription management before or after deleting your Fiume account.

6. Acceptable Use

You must not use Fiume to:

  • engage in activity that violates applicable law or infringes the legal rights of others;
  • record or process other people’s information without their consent in violation of applicable law;
  • generate or spread content that is unlawful, fraudulent, harassing, or infringes the rights of others;
  • distribute malicious code, or attack, damage, or interfere with Fiume or related systems;
  • access other accounts, data, servers, or networks without authorization;
  • circumvent the Service’s security, quotas, subscriptions, access controls, or technical restrictions, or call AI, voice, or search features in bulk through automated means;
  • use the Service in a fraudulent, impersonating, abusive, or otherwise clearly harmful way;
  • reverse engineer, crack, or bypass technical protection measures of the Service to the extent prohibited by applicable law.

These restrictions do not improperly limit interoperability, security research, reverse engineering, or other activities expressly permitted by law.

7. Intellectual Property of Fiume and Hecara

Except for User Content, the Fiume app, software, interface, design, logos, trademarks, text, graphics, sage character designs, and other materials provided by Hecara or its licensors are protected by applicable intellectual property laws.

If you comply with these Terms, we grant you a limited, non-exclusive, non-transferable, revocable license to access and use Fiume for your personal purposes or other normal purposes permitted by applicable law.

Except as expressly permitted by applicable law, these Terms do not transfer ownership of any intellectual property of Fiume, Hecara, or any third party to you.

8. Suspension, Termination, and Account Deletion

You can delete your account through the process provided in the Fiume app.

When you request account deletion, your Fiume account is deactivated immediately and the user content controlled by Hecara enters the permanent deletion process. Limited records necessary for security, abuse prevention, billing, dispute handling, or legal obligations may be retained for as long as necessary.

If you seriously or repeatedly violate these Terms, create security risks for the Service or others, use the Service fraudulently or unlawfully, or if the law requires us to act, we may restrict, suspend, or terminate your access. Except in urgent security cases, where the law requires otherwise, or where notice itself would create risk, we will explain the reason where reasonably practicable.

Termination does not affect rights or payment obligations that arose before termination, or provisions that should remain in effect under applicable law.

9. Third-Party Services

Fiume relies on third-party services for sign-in, App Store subscriptions, push notifications, maps, cloud infrastructure, data sync, AI models, speech recognition, and web search.

Third parties may process data they independently control under their own terms and privacy policies. Your use of Apple services, the App Store, or other third-party services may also be subject to those third parties’ terms.

Fiume does not currently include third-party behavioral analytics or advertising tracking SDKs.

10. Disclaimers

To the maximum extent permitted by applicable law, Fiume is provided “as is” and “as available.” We do not guarantee that the Service will be available at all times, in all regions, on all devices, or in all network environments, or that all features will be error-free.

We use reasonable technical and organizational measures to protect user data, but no network, device, or cloud service can guarantee absolute security.

Nothing in these Terms excludes, limits, or changes statutory warranties, consumer rights, or other liability that cannot be excluded or limited under applicable law.

11. Limitation of Liability

To the maximum extent permitted by applicable law, Hecara is not liable for indirect, incidental, special, punitive, or consequential losses arising from your use of or inability to use Fiume, including indirect loss of profits, opportunities, or data.

These Terms do not exclude or limit liability that cannot be limited or excluded by law, including liability arising from willful misconduct, fraud, gross negligence, personal injury, or other matters for which liability cannot be excluded under applicable law.

Where applicable law permits a cap on total liability, Hecara’s total liability arising from these Terms or the Service is limited to the amount you actually paid for Fiume during the 12 months before the event giving rise to the claim. If applicable law does not allow this limitation, liability is limited to the extent permitted by applicable law.

12. Governing Law and Disputes

Because Fiume is offered in many countries and regions, these Terms do not choose any law to deprive you of mandatory consumer protection or data protection rights you have under the law of your place of residence or other applicable law.

Disputes relating to these Terms or the Service shall be handled by a court or dispute resolution body with jurisdiction under applicable law.

Before starting formal proceedings, you may contact us at [email protected], and we will try to resolve the issue reasonably. These Terms do not limit your right to seek remedies directly from a court, consumer protection authority, data protection authority, or other competent authority under applicable law.

13. Changes to These Terms

We may update these Terms because of feature changes, legal requirements, security needs, or changes to how the Service operates.

If a change materially affects your rights or obligations, we will notify you through an in-app notice, our website, or another reasonable method. Updated Terms will show a new last-updated date and effective date.

Where permitted by applicable law, your continued use of the Service after the updated Terms take effect means you accept the updated Terms. If applicable law requires separate consent, we will ask for it separately.

14. Contact Us

Fiume is provided by Hecara, operated by Zhang Yuxi.

Website: hecara.com
Contact email: [email protected]