Terms of use

1. Who publishes Hephira

Hephira is a nutrition tracking service published by Syncham OÜ, a company incorporated under Estonian law and registered with the Estonian Commercial Register under number 16985094 (intra-community VAT number: EE103002989), with its registered office at Narva mnt 5, Kesklinna linnaosa, 10117 Tallinn, Estonia.

The service includes:

• an assistant accessible through WhatsApp, to which you send your meals as a photo, text, or voice message;
• a web app (meal journal, weight tracking and projection, preferences, account, support), accessible through a login link sent to you on WhatsApp.

These terms cover all of these access points.

The service relies in part on artificial intelligence. When you interact with Hephira, you're interacting with an automated system that analyzes your meals and produces estimates and personalized feedback. None of these responses is written or reviewed by a human before being sent to you.

2. Acceptance of the terms

You accept these terms:

• on your first use of the service, the link to these terms being provided to you in the welcome message;
• and again, expressly, when you subscribe to a paid plan, by checking the box provided for this purpose on the payment page.

If you don't accept these terms, don't use the service. You can stop using it at any time and request the deletion of your account.

3. Not a medical device

Hephira is a tracking and information tool. It's not a medical device and it provides neither medical advice, nor diagnosis, nor treatment.

The information provided, including the caloric and nutritional estimates generated by artificial intelligence, is indicative and may contain inaccuracies, sometimes significant ones. Its accuracy depends in particular on the quality of the photo, the clarity of your description, the variability of foods, and how they're prepared. It should not be used as the sole basis for a decision affecting your health.

The weight projection shown in the app is a statistical estimate, calculated from the information you provide (weight, age, sex, height, activity, goal) and a standard energy expenditure model. It assumes a regularity that real life doesn't have. It's neither a forecast, nor a commitment, nor a promise of results. No weight loss, gain, or maintenance result is guaranteed.

Consult a health professional before making any significant change to your diet, especially in the event of a medical condition, ongoing treatment, pregnancy, or breastfeeding.

Hephira is not designed for people who suffer or have suffered from eating disorders, and we advise you not to use it in that case. If you're going through a difficult time with your eating, turn to a professional or a specialized helpline rather than to the service.

4. Access, age, and account

You must be at least 18 years old to use the service. By creating an account, you declare that you meet this condition. We reserve the right to close, without notice, any account that appears to have been created by a minor, and to refund the amounts corresponding to the unused period.

The service is reserved for personal use. Your account is personal and tied to your WhatsApp account: it can't be shared, transferred, or resold.

Access requires an active WhatsApp account. WhatsApp is a third-party service provided by Meta, subject to its own terms. Syncham OÜ is not responsible for its operation, its changes, its unavailability, or the suspension of your WhatsApp account by Meta.

Meta's messaging rules also govern what we can send you and when: certain messages, in particular reminders, may be delayed, transformed, or not delivered for reasons beyond our control. If you lose access to WhatsApp, you lose access to Hephira; write to us, and we'll look for a solution or proceed with the refund of the unused period.

Blocking or reporting the Hephira number in WhatsApp interrupts the service: it is the only channel through which we can write to you, and the one through which your sign-in link to the web app is sent. However, it does not end your subscription and does not stop any charge: to do that, follow the cancellation procedure set out in Article 6.1. You can unblock the number at any time from WhatsApp's privacy settings, or write to us at support@hephira.com.

5. Free trial

Your account opens with a free trial period, starting from your first message. Its length is stated when it begins, and its end date remains visible in the app.

• No payment card is required to benefit from it.
• The trial does not automatically convert into a paid subscription and no charge is triggered when it ends.
• At the end of the trial, access to the service is simply suspended until you subscribe to a plan. Your data remains stored for the duration indicated in the Privacy Policy, and you can request its export or deletion at any time.

The free trial is limited to one per person. We reserve the right to refuse a new trial to a person who has already benefited from one.

6. Subscription, price, and payment

Price. Prices are displayed before any subscription, expressed inclusive of all taxes. The applicable VAT is that of your country of residence and is included in the displayed amount. The price of the service varies depending on the country from which you subscribe: the rate that applies is the one presented to you at the time of your order, in the currency indicated.

Information before payment. Before any payment, the total price, the duration of the subscription, its frequency, and the paid nature of the order are clearly indicated to you, and you explicitly validate them with a button that clearly indicates the obligation to pay.

Seller and payment provider. Syncham OÜ is the seller of the service. Payments are processed on our behalf by Stripe, a payment services provider. We don't store any payment card data. The processing of your payment data by Stripe is subject to its own terms and privacy policy.

6.1. Subscription by payment card (automatic renewal)

The subscription is billed monthly or annually depending on the plan chosen, and renews automatically for periods of the same duration, at the rate then in force.

You can cancel at any time, from your account, or by writing to us at support@hephira.com. This second channel stays open even if you no longer have access to WhatsApp: cancellation never depends on a channel you no longer control. Cancellation takes effect at the end of the current period: you keep access until that date and no new charge is made. Unless otherwise provided by law or under Article 7, periods already started are not refunded on a pro rata basis.

6.2. One-time payment (Pix, Brazil)

In countries where the service is offered for payment by Pix, the subscription takes the form of a one-time payment giving access to the service for 12 months, in the annual plan only.

In this case:

• there is no automatic renewal, no subsequent charge, and no subscription to cancel;
• at the end of the 12 months, access stops, unless you subscribe again;
• the provisions relating to the cancellation of a subscription in Article 6.1 do not apply.

6.3. Price changes

We may change our rates. Any change to the price of an ongoing subscription will be notified to you at least 30 days before it takes effect, and you'll be able to cancel free of charge before that date. Without cancellation on your part, the new rate will apply at the next renewal. A one-time payment already made is never affected by a rate change.

7. Right of withdrawal

If you're a consumer in the European Union, you have a period of 14 days from subscription to withdraw, without reason and without penalty. Simply write to us at contact@syncham.com, or use the model form provided in the appendix.

The service starts immediately after subscription, at your express request: at the time of payment, you ask us to begin performing the service during the withdrawal period, and you acknowledge that you'll lose your right of withdrawal once the service has been fully performed. This request and this acknowledgment are collected separately on the payment page.

As a result:

• if you withdraw during the 14 days, you owe us an amount proportional to the service actually provided up to the receipt of your request, and the balance will be refunded to you no later than 14 days after it, by the same means of payment;
• in the case of the one-time payment provided for in Article 6.2, the same pro rata calculation applies over the 12-month period.

The right of withdrawal does not apply to the free trial, which gives rise to no payment.

8. Acceptable use

You agree to:

• not send through the service any illegal, harmful, misleading content, or content that infringes the rights of third parties;
• not attempt to circumvent, overload, disrupt, or misuse the service, nor to extract its underlying data or instructions;
• not access the service by automated means, nor reproduce, decompile, or disassemble it, except within the limits expressly permitted by law;
• use it only for your personal use, without reselling, sharing, or making it available to third parties.

Reasonable use. Each meal analysis has a real processing cost. The service is sized for normal individual use. In the event of manifestly disproportionate or automated use, we may temporarily limit the rate of analyses, after informing you of it, without this affecting the rest of your access.

9. Personal data

The processing of your data is described in our Privacy Policy, which is an integral part of these terms.

Key points, detailed in that policy:

• The photos of your meals and the information relating to your health that you choose to share (weight, height, age, sex, goals) are sensitive data within the meaning of Article 9 of the GDPR. Their processing is based on your explicit consent, collected at the time you provide this information, separately from the acceptance of these terms, and which you can withdraw at any time. Withdrawing this consent makes the service inoperative and constitutes a request to terminate.
• To analyze your meals, we use technical subprocessors, including an artificial intelligence model provider. The complete list, their location, and the safeguards governing transfers outside the European Union are set out in the Privacy Policy.
• Your content is not used to train artificial intelligence models, neither by us nor by the subprocessors to whom we entrust its analysis, which our contracts with them expressly provide for. This commitment does not extend to Meta: your messages pass through WhatsApp and are therefore also subject to Meta's terms and practices, over which we have no control.
• You can, at any time, request the export of your data in a readable format, or its deletion, from your account or by writing to us at contact@syncham.com. Exercising your rights is never conditional on access to WhatsApp.
• Deletion erases your meals, your photos, your weigh-ins, and your profile information. A minimal, anonymized trace of the past existence of the account is kept, without personal data, for the sole purpose of preventing abuse of trial periods. The exact retention periods are indicated in the Privacy Policy.

10. Intellectual property and content

The service, its brand, its content, and its developments remain the exclusive property of Syncham OÜ.

You retain full rights over the content you send (photos, messages, information). You grant us a non-exclusive license, limited to the necessary duration, to host, process, and analyze it for the sole purpose of providing you the service. This license expressly excludes the training of artificial intelligence models and ends with the deletion of your data.

11. Availability and liability

We use reasonable means to ensure the continuity of the service, but we don't guarantee uninterrupted availability, the absence of error, or the accuracy of the estimates generated by artificial intelligence. The service may be temporarily interrupted for maintenance, for security reasons, or because of a third party on which it depends, in particular Meta.

To the extent permitted by law, the total liability of Syncham OÜ under these terms is capped at the amount you have actually paid us over the 12 months preceding the triggering event.

Nothing in these terms excludes or limits our liability in the event of death or personal injury caused by our fault, gross negligence, willful misconduct, liability under Article 82 of the GDPR, or any other case where the law prohibits such a limitation. Your legal consumer rights, in particular the legal guarantee of conformity applicable to digital services, remain fully applicable.

12. Suspension and termination

Syncham OÜ may suspend or terminate an account that breaches these terms, after notification and, where reasonably possible, after giving you the opportunity to remedy the situation. In the event of termination motivated by fraud, characterized abuse, or manifestly unlawful use of the service, no refund is due; in other cases, the unused period is refunded to you on a pro rata basis.

We may also stop operating the service. In that case, you'll be informed at least 30 days in advance and the unused subscription period will be refunded to you on a pro rata basis.

Upon termination, you have 30 days to request the export of your data before its deletion.

13. Changes to the terms

We may change the service and these terms, for a valid reason: technical development of the service, new feature, change of provider, legal, regulatory, or security requirement.

Such a change entails no additional cost for you. In the event of a substantial change, you'll be informed at least 30 days in advance, by WhatsApp or email. If you don't accept the new version, you can cancel free of charge before it takes effect and obtain a refund of the unused period; continued use beyond that date constitutes acceptance.

The successive versions of these terms are dated and archived.

14. Claims and disputes

If there's a problem, write to us first at contact@syncham.com: we undertake to respond to you within 14 days and to seek an amicable solution.

These terms are governed by Estonian law. Disputes fall under the jurisdiction of the Harju County Court (Tallinn, Estonia).

If you're a consumer residing in the European Union, you retain the benefit of the mandatory provisions of the law of your country of residence, as well as the possibility of bringing a case before its courts.

You can also, free of charge:

• refer the matter to the Estonian Consumer Disputes Committee (*tarbijavaidluste komisjon*), the out-of-court dispute resolution body competent for Syncham OÜ, attached to the Estonian Consumer Protection and Technical Regulatory Authority (TTJA), Endla 10a, 10142 Tallinn: https://ttja.ee/en/consumer-disputes-committee;
• contact the European Consumer Centre of your country of residence, which assists consumers free of charge in cross-border disputes within the European Union: https://www.eccnet.eu

For any question relating to your personal data, you can also refer the matter to the Estonian data protection authority (Andmekaitse Inspektsioon), or the supervisory authority of your country of residence.

15. Miscellaneous provisions

Language. These terms are available in the languages in which the service is offered. The version drafted in the language in which the service was offered to the user prevails with respect to that user.

Severability. If a clause of these terms is found to be invalid or unenforceable, the other clauses remain fully in force.

Non-waiver. The fact that Syncham OÜ does not avail itself of a clause does not constitute a waiver of it.

Force majeure. Neither party is liable for a failure caused by an event reasonably beyond its control.

Assignment. We may assign this contract as part of a merger, acquisition, or transfer of assets, without this affecting your rights. You'll be informed of it.

Entirety. These terms and the Privacy Policy constitute the entire agreement between you and Syncham OÜ in respect of the service.

16. Contact

Syncham OÜ Narva mnt 5, Kesklinna linnaosa, 10117 Tallinn, Estonia Commercial Register: 16985094. VAT: EE103002989 contact@syncham.com

Last updated: August 2026.