Terms of Use
Last updated 22 August 2026. These terms apply to the Seroa mobile app.
By creating a Seroa account or using the app, you agree to these terms. If you do not agree with them, please do not use Seroa.
Seroa is operated by Twilight Zero Systems Ltd, a private limited company registered in the United Kingdom under company number 17426643, whose registered office is 124 City Road, London, EC1V 2NX, United Kingdom. "We", "us" and "Seroa" in these terms mean that company. Twilight Zero is the parent brand; Seroa is the product.
1. Who can use Seroa
Seroa is for adults aged 18 or over. You confirm your date of birth when you set up your account. You may not use Seroa if you are under 18, or if you are barred from using it under applicable law.
2. Your account
You are responsible for the accuracy of what you enter, for keeping your sign-in details secure, and for activity that happens under your account. Tell us promptly if you believe someone else has access to it. You may close your account at any time from Profile → Delete account & data.
3. What Seroa is for
Seroa is nutrition planning and logging software. It helps you set energy and macronutrient targets, log what you eat, plan meals around what is left in your day, and adapt that plan as your day changes.
4. Seroa is not medical advice
Seroa is not a medical device. It does not diagnose, treat, cure or prevent any disease or condition, and it is not a substitute for professional medical, dietetic or nutritional advice.
Do not use Seroa to manage a medical condition. Always speak to a qualified healthcare professional before making significant changes to your diet, particularly if you are pregnant or breastfeeding, are managing a condition such as diabetes or an eating disorder, are taking medication affected by diet, or have been given clinical dietary advice. If you think you have a medical emergency, contact your local emergency service.
5. Estimates can be wrong
Seroa uses automated analysis, including AI, to identify foods from photos, voice notes and text, and to estimate portions and nutrition. These are estimates, not measurements. They can be wrong, sometimes materially — a hidden ingredient, an oil, a sauce or an ambiguous portion can change the real figures significantly.
Seroa attempts to replace AI estimates with values from verified nutrition databases, marks where a figure came from, and asks you to confirm a result before it is saved. Estimates produced by AI are never presented as verified data. You are responsible for reviewing what you log.
6. Allergies and dietary restrictions
Do not rely on Seroa to keep you safe from a food you must avoid. You can record allergies, intolerances and dietary preferences, and Seroa uses them when it plans and when it interprets what it sees. But food recognition, ingredient lists and third-party food data can all be incomplete or wrong.
Always check the actual product, packaging and ingredients yourself. If a food is dangerous to you, verify it independently of this app, every time.
7. Acceptable use
You agree not to: use Seroa unlawfully; attempt to access another user's data; probe, scan or circumvent our security or access controls; reverse engineer the service except where the law permits it; interfere with or overload the service; use automated means to extract data at scale; resell or redistribute the service; or upload content you have no right to upload, or that is unlawful.
Usage allowances apply to AI features. Attempting to evade them is a breach of these terms.
8. Free and Pro
Seroa has a free tier and a paid subscription, Seroa Pro. Logging, your plan, the decision engine and everything Seroa learns about you are available on the free tier; Pro raises the daily AI allowances and unlocks the additional features described on the subscription screen in the app.
Which features sit in which tier can change as the product develops. Where a change materially reduces what you already pay for, we will tell you.
9. Subscriptions, renewal and cancellation
- Subscriptions are sold and billed by Apple or Google, not by Seroa directly. Prices are shown in the app in your local currency, set by the store.
- Payment is charged to your store account at confirmation of purchase.
- Subscriptions renew automatically for the same period and price unless you cancel at least 24 hours before the end of the current period.
- You manage and cancel a subscription in your App Store or Google Play account settings — not by deleting the app. Deleting the app or your Seroa account does not cancel a store subscription.
- Restore purchases is available on the subscription screen if you reinstall or change device.
- Refunds are handled by the store under its own policy. Seroa cannot issue store refunds.
- Any introductory or trial offer, if one is ever made available, is set and described by the store at the point of purchase. Seroa does not offer a trial separately from the store.
10. Changes to the service
Seroa is actively developed. We may add, change or remove features, and may suspend the service for maintenance. We may update these terms; the current version is always at this address with the date it took effect. Continuing to use Seroa after a change means you accept the updated terms.
11. Intellectual property
Seroa, including its software, design, branding and content, belongs to its operator and is protected by intellectual property law. You get a personal, non-exclusive, non-transferable, revocable licence to use the app for your own personal use, subject to these terms.
Your content stays yours. Your photos, voice notes, descriptions and records remain yours. You grant us only the permission needed to run the service for you — to store, process and transmit that content to the providers described in the Privacy Policy so the app can produce your result. We do not use your content to advertise to you, and we do not sell it.
12. Suspension and termination
We may suspend or terminate an account that breaches these terms, that is being used unlawfully, or where necessary to protect the service or other users. You may stop using Seroa and delete your account at any time. Deleting your account removes your data as described in the Privacy Policy.
13. Disclaimers
To the fullest extent permitted by law, Seroa is provided "as is" and "as available", without warranties of any kind, whether express or implied, including implied warranties of merchantability, fitness for a particular purpose and non-infringement. We do not warrant that the service will be uninterrupted or error-free, or that nutrition estimates, plans or food data will be accurate or complete.
14. Limitation of liability
To the fullest extent permitted by law, the operator of Seroa will not be liable for indirect, incidental, special, consequential or punitive damages, or for loss of profits, data or goodwill, arising out of your use of the service.
Nothing in these terms limits or excludes liability that cannot lawfully be limited or excluded — including liability for death or personal injury caused by negligence, for fraud or fraudulent misrepresentation, or for any other liability that applicable law does not allow to be excluded. If you are a consumer, you keep all rights the law gives you, and nothing here affects them.
15. Governing law
Seroa is operated from the United Kingdom, and these terms are governed by the law of the United Kingdom jurisdiction in which the operator is established. If you are a consumer, you keep the protection of the mandatory laws of your country of residence and may bring proceedings there; nothing in these terms takes that away.
16. Contact
Questions about these terms: support@twilightzero.com, or see the support page.
Twilight Zero Systems Ltd, company number 17426643, United Kingdom.