Terms of use

Last updated · 17 September 2026

The agreement between you and Kalv. Longer than it was, because more of it is now true.

By downloading or using Kalv you accept these terms, the privacy policy and the safety page, which is part of this agreement and not a disclaimer bolted onto it. If you do not accept them, do not use the app. French law governs.

1. What Kalv is

Kalv is a nutrition app for combat-sports athletes. It computes daily calorie and macro targets and a weight trajectory, backwards from a competition date and a weight class that you enter, and it shows you what you logged against them.

What it is not: a coach, a nutritionist, a doctor, a supervisor, or a second opinion. It does not know your medical history, it cannot see you, and it will not notice that something has gone wrong.

2. Who can use it

You must be 18 or over and have the legal capacity to enter into this agreement. One account per person, and the account is yours alone — not your team's, not your gym's.

Kalv is not for minors, and the limit is not administrative. Cutting weight in an athlete who is still growing is a medical decision that belongs to a doctor and to the people responsible for that athlete, and the health data this app holds cannot lawfully be consented to by a minor. If you are under 18, this app is not for you — whatever date of birth the form would accept.

Do not use Kalv if you have or have had an eating disorder, if you are pregnant or breastfeeding, or if you are being treated for a condition affected by body weight, nutrition or hydration — unless the doctor treating you has told you it is fine. This is not a formality: see the safety page.

3. Your account

An account is required; there is no anonymous mode. You are responsible for keeping access to it secure and for everything done through it. Tell us at support@kalv.app if you think someone else has got into it. Give us an address you actually control — it is how you get back in.

4. Your data stays yours

What you enter is yours. You grant us only what is needed to run the service for you: to store it, process it, sync it between your devices and show it back to you. That permission ends when you delete the account. We claim no ownership of your log, we do not use it to train anything, and we do not licence it to anyone.

If you upload a profile photo, you confirm you have the right to it, and you give us permission to store and display it inside the app — nothing more.

5. Subscriptions and payment

Parts of Kalv may require a paid subscription. Where they do, the price, the period and what is included are shown to you in the app before you pay, and never buried.

• Apple is the seller. Every purchase inside Kalv is made through the App Store, and Apple — not us — is the merchant of record. Your payment is a transaction between you and Apple, under Apple's terms.
• It renews by itself. A subscription renews automatically at the end of each period at the then-current price, unless you turn renewal off at least 24 hours before the period ends. Apple charges the renewal within the 24 hours before it starts.
• You cancel it from your Apple account — Settings › your name › Subscriptions. Deleting the app does not cancel a subscription, and neither does deleting your Kalv account. We cannot cancel it for you.
• A free trial, if one is offered, becomes a paid period unless you turn renewal off before it ends. Any unused part of a trial is lost when you buy.
• Refunds are Apple's. They are requested from Apple, through Report a Problem. We cannot issue one on Apple's behalf, though we will help you chase it and will say so plainly if we think you are owed it.
• Prices can change. An increase never applies to a period you have already paid for, and Apple asks you to agree to it before it takes effect.

6. Your right to change your mind

As a consumer in the European Union you have fourteen days to withdraw from a distance purchase, without giving a reason (art. L.221-18 of the French Consumer Code). Because Apple is the seller, you exercise it with Apple.

One thing worth knowing before you tap: if you ask for immediate access to paid content and acknowledge it, you lose the withdrawal right once delivery has begun — that is art. L.221-28 of the same code, and it is how nearly every app subscription works.

7. If it does not work

The legal guarantee of conformity for digital content and services applies (arts. L.224-25-12 and following of the French Consumer Code). The service must match what was described and work as you can reasonably expect; if it does not, you are entitled to have it brought into conformity, and failing that to a price reduction or to end the contract. Because the sale runs through Apple, a claim about a purchase goes to Apple; a claim about the app itself comes to us, at support@kalv.app, and we would rather hear it early than read it in a review.

8. The scanner

The meal scanner runs on our servers. When you scan a plate or a nutrition label, the photograph is sent to us, read by a model run by Anthropic, and the figures come back into the app; the privacy policy says what happens to the image, which is that nobody stores it. Three things to know:

• What comes back is a machine's estimate of what is on a plate. It is often close and it is sometimes wrong, especially on sauces, oils and anything hidden under something else. Check it before you accept it — the app asks you to confirm for exactly that reason, and every figure can be replaced by your own.
• Each scan costs us money to run, so there is a daily allowance, shown in the app when you reach it. It is set generously for a person logging their meals and it exists to stop the scanner being used as something other than a food log.
• The scanner may be unavailable when the model provider is, and we may change the model behind it; neither changes what you are entitled to under § 7.

9. Where the numbers come from

Barcode lookups come from Open Food Facts, an open collaborative database, used under the Open Database License (ODbL). Its entries are contributed by the public, and neither its contributors nor we guarantee that a given product's figures are right or current. Activity figures come from Apple Health and are only as accurate as the device that wrote them.

Kalv's own targets are computed by a formula, not measured. Two athletes at the same weight do not have the same needs, and no equation knows which one you are.

10. What you may not do

• Reverse-engineer, decompile or extract the app's source, except where French law says you may.
• Use it to build a competing product, or scrape it at scale.
• Break it on purpose, probe it for weaknesses without asking first, or use it to reach another athlete's data.
• Resell access to it, or share one account between several people.
• Use it to give someone else a weight-cutting protocol, or to run a cut for an athlete you coach as though the app had approved it. It has not.
• Use it where the law forbids it, or in breach of the rules of your federation.

Found a security flaw? Report it to support@kalv.app before disclosing it. Good-faith reports are welcome and will not be met with legal threats.

11. Availability

Kalv is provided as it is. We aim to keep it running and we do not promise it will never break, never lose a sync, or always be available. Features may change, and a feature may be removed if keeping it makes the product worse — if one you paid for goes, you will be told and you will not be charged for it again.

12. Liability

We are liable for direct damage we cause you by failing to do what this agreement says we will do. To the extent French law allows, we are not liable for indirect or unforeseeable loss: a missed weigh-in, a cancelled bout, a lost purse, lost sponsorship, a suspension, a lost season, or any consequence of a training, hydration or nutrition decision you took. Where a limit is enforceable, our total liability is capped at what you paid us in the twelve months before the claim.

Nothing here limits liability for death or personal injury caused by our negligence, for fraud, or for anything else the law does not allow to be limited — and nothing here takes away the rights French consumer law gives you, which apply whatever this page says.

13. Ending it

You can stop at any time by deleting your account from Profile › Data. Remember that this does not cancel an Apple subscription — cancel that separately, in your Apple account.

We may suspend or close an account that breaks these terms, after warning you unless the breach makes a warning pointless. If we close the service down entirely, we will give reasonable notice and time to request a copy of your data.

14. Changes to these terms

These terms may change. If a change matters, you will be told inside the app before it applies, and continuing to use Kalv after that is acceptance. If you do not accept it, stop using the app and delete your account — that is always available, and it costs nothing.

15. Law, and what to do if we disagree

French law governs this agreement. If you are a consumer resident in the European Union you keep the protection of your own country's mandatory consumer rules and may bring a claim before the courts where you live.

Before any of that, write to us. Most disputes are a misunderstanding that one email fixes, and we would rather fix it than win it.

Consumer mediation

As a consumer you have the right to refer a dispute to an approved consumer mediator, free of charge, before taking it to a court. Where you bought Kalv decides who that runs through. Kalv is sold through the App Store, and in Europe the seller of record is Apple Distribution International Ltd — you acquire the licence from Apple, and Apple carries the mediation route for that purchase. Anything about the purchase, the price, a refund or a subscription is between you and Apple.

For the service itself, which is ours: no mediator is appointed, because we do not sell to you directly. If that ever changes — if Kalv is ever sold anywhere other than an app store — one will be appointed and named here and in the legal notice before the first sale. Until then write to support@kalv.app, and your right to bring the matter before the courts where you live is untouched by any of this.

16. Terms Apple requires

Kalv is distributed through the App Store, and Apple requires the following to be part of this agreement. Where these terms and Apple's minimum terms conflict, Apple's prevail.

• Who you are contracting with. This agreement is between you and Aleksandar Dzavric, not Apple. We alone are responsible for Kalv and its content.
• What the licence covers. You get a personal, non-transferable licence to use Kalv on Apple-branded products you own or control, as permitted by the Usage Rules of the Apple Media Services Terms and Conditions, including Family Sharing.
• Support. We alone are responsible for maintenance and support. Apple has no obligation to provide any.
• Warranty. We alone are responsible for any warranty, express or implied. If Kalv fails to conform to a warranty that applies, you may notify Apple and Apple will refund the purchase price; beyond that refund, Apple has no warranty obligation whatsoever, and anything else arising from a failure to conform is ours.
• Claims. We, not Apple, are responsible for addressing any claim you or a third party makes about Kalv — product liability, failure to meet a legal or regulatory requirement, and claims under consumer protection, privacy or similar law.
• Intellectual property. If anyone claims Kalv infringes their intellectual property, we, not Apple, are responsible for investigating, defending, settling and discharging that claim.
• Legal compliance. You confirm you are not in a country under a US Government embargo or designated as supporting terrorism, and that you are not on any US Government list of prohibited or restricted parties.
• Who to contact. Aleksandar Dzavric, 63 chemin des Moellerons, 73100 Aix-les-Bains, France — support@kalv.app. Questions, complaints and claims about Kalv go there.
• Third-party terms. You must comply with the terms of any third-party service you use through Kalv — Open Food Facts when you scan a barcode, Apple Health if you connect it.
• Apple's own right to enforce. Apple and its subsidiaries are third-party beneficiaries of this agreement, and on your acceptance of it Apple has the right to enforce it against you as such.

17. The rest

If a clause here turns out to be unenforceable, the rest stands. Not enforcing something once does not mean giving it up. You may not transfer this agreement; we may transfer it if the business is transferred, and will tell you if that happens. Neither of us is liable for a failure caused by something genuinely outside our control. These documents — terms, privacy policy, safety page — are the whole agreement between us about Kalv, and they are written in English; a translation is provided for convenience and the English governs.

Contact

Aleksandar Dzavric, SIRET 94471075500017, 63 chemin des Moellerons, 73100 Aix-les-Bains, France — support@kalv.app.