# Terms of service

> The terms that apply when you use Kallo and Kallo Premium, on the web and in the mobile apps.

This document is the agreement between you and VÕ MINH KHÔI ("Kallo",
"we") covering your use of Kallo on the web, iOS and Android. By creating an
account or continuing to use the service, you confirm that you have read and
agree to what follows, together with the terms the app store or payment
provider shows you at checkout.

If you disagree with any part of this, please stop using the service.

> **Read alongside**
>
> The [privacy policy](https://kallo.fit/en/docs/legal/privacy) sets out exactly what data we process
> and how you control it. The two documents are meant to be read together.

## 1. What Kallo does, and what it does not

Kallo helps you log meals in natural language and **estimate** their nutrition.
It breaks your sentence into dishes and ingredients, matches them against food
composition data ([FAO](https://www.fao.org/food-composition/tables-and-databases/en/), [USDA](https://fdc.nal.usda.gov/), and the [Vietnam National Food Composition Table
2007](https://www.fao.org/fileadmin/templates/food_composition/documents/pdf/VTN_FCT_2007.pdf)), and returns weights and nutrition figures with bounds.

Three limits you should understand before relying on a number:

- **These are estimates, not measurements.** Results depend on how you describe
  a meal, how it was actually cooked, and how well the reference data covers it.
  Error is normal and expected.
- **Kallo is not a medical device.** It does not diagnose, treat or prevent any
  condition, and it is not a substitute for advice from a doctor, dietitian or
  other qualified health professional.
- **Decisions remain yours.** If you are pregnant, managing a medical
  condition, recovering from an eating disorder, or following a treatment plan,
  talk to a health professional before changing your diet based on figures in
  the app.

## 2. Eligibility and your account

You must be at least 13 to create a Kallo account. If you are in Vietnam and
under 16, processing your personal data requires the consent of a parent or
legal guardian under applicable law.

You can sign in with an email and password, with Google, or with Apple. For your
account, you agree to:

- Give accurate information and keep it current.
- Keep your credentials confidential, and accept responsibility for activity
  under your account.
- Tell us at support@kallo.fit if you suspect unauthorised access.

One person should hold one account. We may merge or restrict duplicate accounts
created to work around usage limits or to repeat a trial.

## 3. Acceptable use

You agree not to:

- Use Kallo unlawfully, or in a way that infringes anyone else's rights.
- Reverse engineer, decompile, or attempt to extract the source code, models,
  internal prompts or reference data of the service, beyond what the
  source-available licence in section 10 permits.
- Scrape, send bulk requests, or use automated tooling to reach the service
  outside its official interfaces.
- Resell, rent, or offer Kallo to third parties as a service.
- Upload content that is unlawful, abusive, harassing, or that contains other
  people's personal data you have no right to share.
- Deliberately submit input intended to manipulate or disrupt the analysis
  system.

### Usage limits

To protect the service and other people using it, AI meal analysis is rate
limited per minute, per hour and per day, alongside a limit on concurrent
analyses. When you reach a limit you will see a message and can try again
shortly. We may adjust these thresholds to keep the service stable, and may
suspend accounts showing serious abuse.

## 4. Your content

Your meal descriptions, avatar, feedback screenshots, group messages and
anything else you put into Kallo remain yours.

So the service can function, you grant us a non-exclusive, royalty-free,
worldwide licence to store, copy, process and display that content **for the
purpose of providing the service to you** — including sending meal descriptions
to our AI provider to produce the estimate you asked for, and showing content
you actively share to the people you shared it with.

This licence ends when you delete the content or your account, other than
technical backups that persist for the limited window described in the
[privacy policy](https://kallo.fit/en/docs/legal/privacy).

We do not use your content to train shared AI models.

## 5. Circle and shared content

Circle lets you share meals with friends, groups, or a private chat. A few
things to know:

- When you share a meal, everyone in its audience sees the description, its
  dishes and its nutrition figures.
- Friend invites work by link. Anyone holding the link can request to connect,
  so only share it with people you actually know. You can remove a friend at any
  time.
- You can turn on automatic sharing in Settings. While it is on, new meals are
  shared according to your setting with no further action — check this option if
  you want your log to stay private.
- Content that others have already seen, copied, or logged into their own diary
  may persist after you delete your original.

You are responsible for what you share and how you behave in shared spaces.

## 6. Kallo Premium

Some features — AI meal analysis among them — are part of **Kallo Premium**.

### Plans

We offer **monthly**, **annual** and **lifetime** plans. The price, currency,
renewal cadence and any applicable tax are shown before you confirm payment.
Prices vary by region and may change over time; a price change never applies
retroactively to a period you have already paid for.

### Trials

Kallo may offer an app-level trial period. A trial does **not** by itself create
a paid subscription and does not automatically convert into one. If you choose
to subscribe, checkout shows when billing starts and what the renewal price is.

### Automatic renewal

Monthly and annual plans **renew automatically** at the price and cadence shown,
until you cancel. Payment is charged to the Apple, Google or web billing account
you selected.

Cancel where you bought:

- **iOS** — the Subscriptions section of the App Store.
- **Android** — the Subscriptions section of Google Play.
- **Web** — the plan management link in Settings.

Cancelling stops future renewals. You normally keep access through the end of
the period you have paid for.

### When Premium actually starts

Premium access begins only **after the billing provider confirms** the
transaction to our systems. For a pending payment, access unlocks once the store
finishes processing. Upgrades, downgrades, billing-cycle changes, grace periods
and pending transactions follow the rules of the relevant store.

### Lifetime purchases

A lifetime purchase is a one-time payment for the Premium features Kallo
continues to offer for this product and this account. Two things matter:

- Buying lifetime does **not** automatically cancel a running recurring
  subscription. If you hold both, cancel the recurring plan to avoid a further
  charge.
- "Lifetime" is tied to the life of the product. It is not a promise that the
  service, any particular feature, or any third-party integration will exist
  forever.

### Refunds and tax

For purchases made on the web, **Paddle.com Market Limited is the merchant of
record**: Paddle sells the subscription to you, takes payment, collects and
remits any applicable sales tax or VAT, and issues your receipt. Purchases made
in the mobile apps are sold by Apple or Google under their own terms.

Displayed prices may include or exclude tax depending on your region, as shown
at checkout.

**How to ask for a refund.** Email [support@kallo.fit](mailto:support@kallo.fit)
with the email address you paid with, and tell us what happened. You can also
request a refund through Paddle using the link on your receipt. For purchases
made in the mobile apps, refunds are handled by Apple or Google under their own
policies — we cannot issue those ourselves.

**How we handle it.** We read every request and reply within 5 working days. We
normally refund a charge that was clearly not intended — a duplicate payment, a
renewal you did not mean to keep and have not used since it was charged, or a
payment taken after you cancelled. Outside those cases we look at the
circumstances rather than applying a blanket rule, so it is always worth asking.

**Your legal rights are unaffected.** Depending on where you live you may have a
statutory right to cancel or to a refund — in the EU and UK, generally a 14-day
right of withdrawal for digital purchases. Nothing in this section limits those
rights.

When a refund, reversal, expiry or revocation is confirmed, we update your
access accordingly.

## 7. Deleting your account

You can delete your account in Settings at any time.

> **Important**
>
> Deleting your Kallo account does **not** cancel an active subscription,
> wherever you bought it. If you want charges to stop, cancel **first** — in the
> App Store, on Google Play, or through the web billing portal you purchased
> through — then delete. Deleting your account removes your access, but it does
> not reach the store or payment provider that charges you.

What gets deleted, when, and what is retained for legal or backup reasons is set
out in the [privacy policy](https://kallo.fit/en/docs/legal/privacy).

## 8. Changes to the service

Kallo is under active development. We may add, change, replace or discontinue
features. Where a change materially reduces the value of a paid feature you are
using, we will handle it in line with applicable law and the rules of the
relevant store.

## 9. Suspension and termination

We may restrict or terminate access where an account shows serious abuse,
creates legal risk, or threatens the stability and safety of the service and its
users. Where reasonable and legally permitted, we will give notice and a chance
to put things right.

You can stop using the service at any time by deleting your account.

## 10. Intellectual property

Kallo, its branding, interface and content belong to VÕ MINH KHÔI or its
licensors. The project's source code is published under a **source-available**
licence: you may read, fork, build and run it for non-production use. Commercial
use, redistribution, or running Kallo as a managed service requires a separate
agreement.

Reference nutrition data derives in part from the [Vietnam National Food
Composition Table 2007](https://www.fao.org/fileadmin/templates/food_composition/documents/pdf/VTN_FCT_2007.pdf), along with [FAO](https://www.fao.org/food-composition/tables-and-databases/en/) and [USDA](https://fdc.nal.usda.gov/) data, and belongs to the
respective publishers.

## 11. Disclaimers

We work to keep Kallo reliable, but we do not promise uninterrupted, error-free
or always-accurate operation. To the extent permitted by law, the service is
provided **"as is"** and **"as available"**, without warranties of any kind.

## 12. Limitation of liability

To the extent permitted by law, our total liability for all claims arising out
of or relating to the service is limited to the amount you paid Kallo in the
**12 months** before the claim arose.

We are not liable for indirect, incidental, special or consequential damages,
including lost data, lost profits, or harm to health arising from relying on
nutrition estimates without professional advice.

Nothing here excludes liability that cannot lawfully be excluded, including
liability for wilful misconduct or fraud.

## 13. Changes to these terms

We may update this document as the service or the law changes. The revision date
is always shown at the top of the page. For material changes we will give notice
in the app or by email before they take effect. Continuing to use the service
after the effective date means you accept the update.

## 14. Governing law and disputes

These terms are governed by **the laws of Vietnam**. Disputes will be resolved
by **the competent People's Court in Ho Chi Minh City**, unless consumer
protection law where you live gives you the right to bring a claim elsewhere.

Nothing in this clause deprives you of any right that mandatory consumer
protection law in your country of residence gives you.

We would rather you emailed support@kallo.fit first — most issues resolve far
faster that way.

## 15. Contact

Questions about these terms: [support@kallo.fit](mailto:support@kallo.fit)

Operated by VÕ MINH KHÔI, 88/2 Đ. Đào Duy Anh, Đức Nhuận ward, Ho Chi Minh City 700000, Vietnam.

---

_Source: [https://kallo.fit/en/docs/legal/terms](https://kallo.fit/en/docs/legal/terms) · Last updated: 2026-08-02 · Kallo docs index: [https://kallo.fit/llms.txt](https://kallo.fit/llms.txt)_