Terms of Use

Effective date: November 11, 2026 · Last updated: November 11, 2026

1. Who these terms are between

These terms are an agreement between you and Zihan Tong, the individual developer who develops and operates Gulu (咕噜) ("we", "us"), covering your use of the Gulu app and its server services (together, the "Service").

Because you get Gulu from the App Store, Apple's Licensed Application End User License Agreement (Standard EULA) also applies. These terms supplement the Standard EULA. If they conflict, these terms govern as to the Service itself, but nothing in them limits Apple's rights under the Standard EULA. How we handle your personal information is explained in our Privacy Policy.

By using the Service you agree to these terms. If you do not agree, please do not use the Service.

2. The Service

Gulu has three plans. Paid plans belong to the whole family: when one person buys, every member of the family can use it.

We keep improving Gulu, so features may be added, changed or removed. If a change would materially reduce the features of a plan you have paid for, we will tell you in advance.

3. Eligibility and accounts

• You must have reached the age of majority where you live to use Gulu. Gulu is not directed to children.
• Family sync requires signing in with your email: we send a one-time code to your inbox, and there is no password. Anyone who can read that inbox can sign in to your account, so keep your email account secure.
• You are responsible for activity through your account and devices. If you think someone else is using your account, contact us promptly and remove any devices you don't recognise in the app.
• You can delete your account at any time under More → Account → Delete Account. What happens is described in the Privacy Policy.

4. Families and sharing

• Before you create or join a family, the app explains what will be uploaded and asks for your consent; see the Privacy Policy.
• Every member of a family can see all of that family's baby profiles and records, and can add, edit and delete them. Share invite codes only with people you trust.
• A free family can sync up to 3 phones or tablets, counted in the order they joined. Without Gulu Family or Gulu Plus, a 4th device cannot join the family. The family owner can remove devices that are no longer used to free up a place.
• The family owner can remove members. A member who leaves or is removed stops syncing, but records already synced to their devices may remain on those devices; we cannot delete them remotely.
• By entering records in a family, you agree that the other members can see them. Create profiles and enter information only for children you are entitled to care for.

5. Paid subscriptions: Gulu Family and Gulu Plus

• Gulu Family and Gulu Plus are auto-renewing subscriptions bought through Apple, each available monthly or yearly. In the US, Gulu Family costs US$1.99 a month or US$14.99 a year, and Gulu Plus US$3.99 a month or US$29.99 a year; elsewhere, Apple's converted local prices apply. Prices are shown in the app and on the App Store before you buy, and the price shown on the App Store is the one that applies.
• A free trial is offered only on Gulu Plus yearly: 14 days. The App Store shows whether you are eligible. When the trial ends it converts to a paid subscription unless you cancel at least 24 hours before it ends. Gulu Family and Gulu Plus monthly have no trial.
• Payment is charged to your Apple Account when you confirm the purchase. A subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and Apple charges for the next period within 24 hours before the current one ends.
• Upgrades and downgrades: upgrading from Gulu Family to Gulu Plus takes effect immediately, and Apple refunds the unused part of your Gulu Family period on a prorated basis. Downgrading from Gulu Plus to Gulu Family takes effect at your next renewal, when the current period ends.
• To manage, change or cancel a subscription, go to Settings → Apple Account → Subscriptions on your iPhone. Deleting the app or your Gulu account does not cancel your subscription.
• Apple handles payments, charges and refunds under its own rules. To ask for a refund, contact Apple at reportaproblem.apple.com; we cannot issue refunds directly. Apple notifies you of price changes under its rules.
• A paid plan belongs to the family the purchase was made for, and every member of that family can use it. If the person who paid leaves the family, the purchase moves with them and the original family's paid plan ends after 7 days.
• We may also give a paid plan for a period through redemption codes; the plan, the code's validity and the length are shown when you redeem it.
• When a paid plan ends, the family returns to Free. AI features stop and Apple Watch stops syncing. If the family has more than 3 phones or tablets, the 3 that joined first keep syncing and the newer ones stop. Records on every device are unaffected and you can keep logging on your device; nothing on our servers is deleted because the plan ended (see the Privacy Policy).

6. Not medical advice; AI output

• Gulu helps you record and review information. It is not a medical device and does not provide diagnosis, treatment or medical advice. Charts, statistics, alerts and AI-generated content in the app are for information only.
• AI-generated content, including log entries created from your voice or photos, may be inaccurate, incomplete or out of date. Please check it and rely on your own observations.
• The absence of an alert does not mean everything is fine. Gulu does not monitor your baby and is no substitute for watching over them.
• For any question about your baby's health, feeding, medication or development, ask a doctor or another qualified health professional. Do not delay seeking care or disregard professional advice because of anything in the app.
• In an emergency, call your local emergency number immediately (for example 911 in the US and Canada, 999 in the UK, 000 in Australia, 111 in New Zealand, 995 in Singapore).

7. Your content

• The baby profiles, records and notes you enter in Gulu ("your content") belong to you.
• So that we can provide the Service to you and your family, you grant us a worldwide, royalty-free, non-exclusive licence to store, copy, transmit and process your content as needed to provide the Service, including passing it to our service providers as described in the Privacy Policy (for example, to the AI provider once you have consented). This licence is only for operating and providing the Service and ends when your content is deleted from our servers (apart from the backup retention described in the Privacy Policy).
• You confirm that you are entitled to enter your content and that doing so does not infringe anyone else's rights.
• Please use the app's export or backup features regularly to keep your own copy.

8. Acceptable use

When using the Service, you must not:

• break any applicable law or infringe anyone's privacy or other rights;
• enter other people's information without authority, or impersonate anyone;
• get around subscriptions, rate limits or other technical restrictions, or access our servers by automated means other than through the Gulu app;
• interfere with, overload or disrupt the Service, or try to gain unauthorised access to another family's data;
• reverse engineer, decompile or modify the app, except as the law allows.

9. Disclaimer

To the fullest extent permitted by law, the Service is provided "as is" and "as available". We work to keep the Service running and your data syncing accurately, but we do not promise that the Service will be uninterrupted or error-free, or that sync or AI results will suit your particular needs. Sync relies on networks and third-party providers and may be delayed or interrupted.

Nothing in this section excludes or limits rights you have under consumer protection law where you live that cannot be excluded by contract (for example, the guarantees under the Australian Consumer Law, the UK Consumer Rights Act 2015 or the New Zealand Consumer Guarantees Act).

10. Limitation of liability

• To the fullest extent permitted by law, we are not liable for indirect, incidental, special or consequential losses, including loss of profits or loss of data.
• To the fullest extent permitted by law, our total liability arising out of these terms or the Service is limited to the greater of: the amount you paid for Gulu Family or Gulu Plus in the 12 months before the claim; or US$50 (or the equivalent in local currency).
• These limits do not apply to death or personal injury caused by our negligence, to fraud, or to any other liability that cannot be limited or excluded by law.

11. Suspension and termination

• You may stop using the Service and delete your account at any time.
• If you seriously or repeatedly breach these terms, or the law requires it, we may suspend or end your access to sync and AI features. Where reasonably practicable, we will tell you in advance and explain why.
• If we decide to stop running Gulu's server services, we will try to give you at least 30 days' notice so you have time to export your data. Free on-device logging will keep working after the server services stop, but we will no longer guarantee app updates.
• Sections that by their nature should survive termination (such as Sections 6, 7, 9, 10 and 13) continue to apply.

12. Changes to these terms

We may update these terms and will change the "Last updated" date on this page. We will tell you about material changes in the app or by email before they take effect. If you keep using the Service after a change takes effect, you accept the updated terms; if you do not accept them, stop using the Service and cancel your subscription.

13. Governing law and disputes

These terms are governed by the laws of the State of California, USA, without regard to its conflict-of-law rules. If a dispute arises from these terms, please email us first and we will try in good faith to resolve it within 60 days; if we cannot, it will be resolved by the state or federal courts located in California that have jurisdiction. If you are a consumer, this does not affect the mandatory protections of the law of the country or region where you live, or your right to bring proceedings in your local courts.

14. General

• These terms, the Privacy Policy and Apple's Standard EULA are the entire agreement between you and us about the Service.
• If any provision of these terms is found invalid or unenforceable, the rest remain in effect.
• If we do not enforce a right, that does not mean we have waived it.
• If Gulu as a whole is transferred to another operator, we may transfer these terms to them, and will tell you in advance.

15. Contact

Zihan Tong, email support@bygulu.com.