Privacy Policy

Weight Management System 4.0

Version1.0 Effective DateApril 09, 2026 JurisdictionEU / EEA & Global FrameworkGDPR (EU) 2016/679

Introduction & Scope

Welcome to Weight Management System 4.0 (hereinafter “the Platform,” “we,” “us,” or “our”), an online coaching platform offering personalised weight management services, nutritional guidance, and health tracking tools to users worldwide, including users located in the European Union and the European Economic Area.

This Privacy Policy explains how we collect, use, store, share, and protect your personal data when you access or use our Platform, in accordance with Regulation (EU) 2016/679 of the European Parliament and of the Council (the General Data Protection Regulation, “GDPR”), in particular Articles 13 and 14 thereof.

This Policy applies to all personal data collected:

  • Directly from you when you register, use our services, or contact us (Article 13 GDPR); and
  • Indirectly from third-party sources, such as healthcare providers, fitness applications, or public databases (Article 14 GDPR).
⚡ Key Principle We are committed to processing your personal data lawfully, fairly, and transparently. We collect only what is necessary and retain it no longer than required. Your privacy is not an afterthought — it is foundational to how we operate.

By using the Platform, you acknowledge that you have read and understood this Privacy Policy. If you do not agree with any part of this Policy, please do not use our services.

1Data Controller Information

For the purposes of the GDPR, the entity responsible for your personal data — the Data Controller — is:

Data Controller

Company: Weight Management System 4.0 Co., Ltd.

Address: 99 Lang Ha, Dong Da, Hanoi, Vietnam

Registration: Business Registration No. ., issued by ., Vietnam

Email: info@24k.agency

Phone: +84 93 253 8888

Website: https://24k.agency

1.1 EU Representative (Article 27 GDPR) Required for Non-EU Controllers

As a company established outside the EU that offers services to individuals in the EU, we have appointed an EU Representative pursuant to Article 27 GDPR:

EU Representative

Name:.

Address:.

Email: info@24k.agency

Phone:.

⚠ Important EU data subjects may contact our EU Representative directly to exercise their data protection rights or raise concerns. The EU Representative acts on behalf of the Data Controller but does not replace the right to lodge a complaint with a supervisory authority.

1.2 Data Protection Officer (DPO)

We have appointed a Data Protection Officer (DPO) to oversee compliance with applicable data protection laws:

Data Protection Officer

Name: Pham Minh Huy

Email: info@24k.agency

Postal: 99 Lang Ha, Dong Da, Hanoi, Vietnam

2Categories of Personal Data Collected

2.1 Data You Provide Directly Art. 13 GDPR

CategoryExamples of DataMandatory / Optional
Identity DataFull name, date of birth, genderMandatory
Contact DataEmail address, phone number, country of residenceMandatory (email); Optional (phone)
Health & Body Data Special CategoryBody weight, height, BMI, target weight, dietary restrictions, physical activity levelMandatory for core services
Account CredentialsUsername, hashed passwordMandatory
Progress & Coaching DataWeight logs, meal plans, exercise records, coach messages, progress photos (if uploaded)Optional
Payment DataBilling name, country, last 4 digits of card (processed by payment processor)Mandatory for paid tiers
Communication DataCustomer support messages, survey responses, feedbackOptional

2.2 Data Collected Automatically Art. 13 GDPR

CategoryExamples of Data
Usage DataPages visited, features used, session duration, click patterns
Device & Technical DataIP address, browser type, operating system, device identifiers
Location DataCountry-level location derived from IP address
Cookie DataSession cookies, analytics cookies (see Section 10)

2.3 Data Received from Third Parties Art. 14 GDPR

Where applicable, we may receive personal data from the following sources:

  • Fitness & Health Apps: Data from connected applications (e.g., Apple Health, Google Fit) if you grant integration permissions;
  • Social Login Providers: Basic profile data (name, email) from Google or Apple if you use social sign-in;
  • Payment Processors: Transaction status and billing verification data;
  • Healthcare Referral Partners: Referral information, if your healthcare provider recommended our platform.
✅ Article 14 Transparency When we receive your data from third parties, we will inform you of this within one (1) month of obtaining the data, or at the time of first contact with you, whichever is earlier, as required by Article 14(3) GDPR.

3Purposes of Processing & Legal Basis

We process your personal data only for specific, explicit, and legitimate purposes. The table below details each processing activity, its purpose, and the corresponding legal basis under Article 6 GDPR.

Purpose of ProcessingDescriptionLegal Basis (Art. 6 GDPR)
Account Registration & AuthenticationCreating and managing your user account, verifying identity, enabling loginArt. 6(1)(b) – Contractual necessity
Service DeliveryProviding personalised coaching, weight tracking, meal plans, and progress analysisArt. 6(1)(b) – Contractual necessity
Health Programme PersonalisationTailoring recommendations based on your health and weight dataArt. 6(1)(a) – Explicit consent; Art. 9(2)(a) – for health data
Payment ProcessingBilling for premium subscriptions, issuing invoices, processing refundsArt. 6(1)(b) – Contractual necessity
Customer SupportResponding to enquiries, resolving complaints, providing technical assistanceArt. 6(1)(b) – Contractual necessity; Art. 6(1)(f) – Legitimate interests
Safety & Medical AlertsDetecting anomalies in health data that may indicate a medical riskArt. 6(1)(d) – Vital interests; Art. 9(2)(c) – for health data
Analytics & Platform ImprovementAggregated, anonymised analysis to improve features and user experienceArt. 6(1)(f) – Legitimate interests
Marketing & NewslettersSending promotional emails, product updates (opt-in only)Art. 6(1)(a) – Consent
Legal ComplianceComplying with tax, accounting, and regulatory obligationsArt. 6(1)(c) – Legal obligation

4Special Category Data (Health Data)

⚠ Sensitive Data Notice Health and body composition data (weight, BMI, dietary needs, medical conditions) constitutes Special Category Personal Data under Article 9 GDPR and is subject to heightened protection.

We process this data exclusively on the basis of your explicit consent (Article 9(2)(a) GDPR), obtained at the point of registration. You may withdraw this consent at any time; however, withdrawal will prevent us from providing personalised coaching services.

  • Health data is stored in encrypted form and accessible only to authorised coaching staff;
  • Health data is never sold, rented, or shared with advertisers;
  • Aggregated, anonymised health statistics may be used for platform research, but such data cannot be linked back to any individual.

5Data Retention Periods

Data CategoryRetention PeriodBasis
Account & Identity DataDuration of account + 2 years after closureContractual necessity, legal obligations
Health & Body DataDuration of active subscription + 12 monthsConsent; deleted upon withdrawal
Payment Records7 years from transaction dateTax and accounting obligations (Art. 6(1)(c))
Usage & Analytics Data26 months (anonymised after 13 months)Legitimate interests
Support Communications3 years from resolutionLegitimate interests (dispute resolution)
Marketing Consent RecordsUntil consent is withdrawn + 1 yearCompliance with consent obligations
Cookie DataAs specified in Cookie Policy (max. 13 months)ePrivacy Directive / consent

6Sharing & Disclosure of Personal Data

We do not sell your personal data. We may share your data with the following categories of recipients, strictly on a need-to-know basis and under binding contractual obligations:

RecipientPurposeSafeguards
Coaching StaffProviding personalised coaching servicesConfidentiality agreements, role-based access
Payment Processors (e.g., Stripe, PayPal)Processing subscription paymentsPCI-DSS compliant; Data Processing Agreement
Cloud Infrastructure (e.g., AWS, Google Cloud)Hosting and data storageStandard Contractual Clauses (SCCs)
Analytics Providers (e.g., Google Analytics)Platform usage analyticsData anonymisation; DPA in place
Email Service ProvidersTransactional and marketing emailsData Processing Agreement
Legal / Regulatory AuthoritiesCompliance with court orders or legal obligationsOnly as required by applicable law

7International & Cross-Border Data Transfers

As our Platform operates globally with servers that may be located outside the EU/EEA, your personal data may be transferred to countries that do not provide the same level of data protection as the EU.

In all such cases, we ensure appropriate safeguards are in place, including:

  • Standard Contractual Clauses (SCCs) approved by the European Commission (Decision 2021/914/EU);
  • Adequacy Decisions where the recipient country has been recognised by the European Commission as providing adequate protection;
  • Binding Corporate Rules (BCRs) where applicable within our group of companies.

You may request a copy of the applicable transfer safeguards by contacting us at info@24k.agency.

8Your Rights as a Data Subject

Under the GDPR, you have the following rights with respect to your personal data. We will respond to all verified requests within one (1) month (extendable by two months for complex requests).

Right of Access (Art. 15)

Request a copy of all personal data we hold about you, along with information on how it is processed.

Right to Rectification (Art. 16)

Request correction of inaccurate or incomplete personal data without undue delay.

Right to Erasure (Art. 17)

Request deletion of your personal data (“right to be forgotten”) in certain circumstances.

Right to Restriction (Art. 18)

Request that we restrict processing of your data while a dispute is being resolved.

Right to Data Portability (Art. 20)

Receive your personal data in a structured, machine-readable format (JSON/CSV) for transfer to another provider.

Right to Object (Art. 21)

Object to processing based on legitimate interests or direct marketing at any time.

Right to Withdraw Consent (Art. 7(3))

Withdraw consent for any processing activity based on consent, at any time, without affecting prior processing.

Right to Lodge a Complaint (Art. 77)

Lodge a complaint with your local EU supervisory authority if you believe your rights have been violated.

✅ How to Exercise Your Rights Submit your request to info@24k.agency with subject line “GDPR Data Subject Request.” Include your full name, account email, and a description of your request. We may ask for identity verification before processing.

9Automated Decision-Making & Profiling

Our Platform uses automated processing (including AI-assisted recommendations) to generate personalised nutrition plans, fitness goals, and progress insights. This constitutes profiling within the meaning of Article 22 GDPR.

  • Automated recommendations do not produce legal or similarly significant effects;
  • All AI-generated plans are reviewed and approved by a certified human coach before delivery;
  • You may opt out of profiling-based personalisation by contacting info@24k.agency.

10Cookies & Tracking Technologies

We use cookies and similar tracking technologies on our Platform. A separate Cookie Policy details all cookies used, their purposes, and your consent options. Below is a summary:

Cookie TypePurposeConsent Required
Strictly NecessarySession management, security, login persistenceNo (legitimate interest)
FunctionalLanguage preferences, UI settingsNo (legitimate interest)
AnalyticsGoogle Analytics — anonymised usage statisticsYes (opt-in)
MarketingRetargeting, conversion trackingYes (opt-in)

You may manage your cookie preferences at any time via the Cookie Settings link in the website footer.

11Children’s Privacy

Our Platform is intended for users aged 18 and over. We do not knowingly collect personal data from children under the age of 16 (or the applicable age of digital consent in your Member State, which may be lower).

If we become aware that we have collected personal data from a child without verifiable parental consent, we will delete such data immediately. If you believe we hold data from a child, please contact info@24k.agency.

12Security Measures

We implement appropriate technical and organisational measures to protect your personal data against unauthorised access, accidental loss, destruction, or disclosure:

  • Encryption: AES-256 encryption at rest; TLS 1.3 in transit;
  • Access Controls: Role-based access; multi-factor authentication for staff;
  • Regular Audits: Periodic security assessments and penetration testing;
  • Incident Response: Data breach notification to supervisory authorities within 72 hours (Art. 33 GDPR); affected users notified without undue delay where high risk (Art. 34 GDPR);
  • Data Minimisation: We collect and retain only what is strictly necessary.

13Updates to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our processing activities, applicable law, or platform features. We will notify you of material changes by:

  • Posting the updated Policy on this page with a revised “Effective Date”;
  • Sending an email notification to your registered account address for significant changes;
  • Displaying an in-app banner for 30 days following material updates.

Continued use of the Platform after the effective date of any update constitutes your acceptance of the revised Policy.

14How to Contact Us & Lodge a Complaint

For any questions, concerns, or requests relating to this Privacy Policy or our data processing activities, please contact us:

Privacy Enquiries

Email: info@24k.agency

DPO Email: info@24k.agency

Post: 99 Lang Ha, Dong Da, Hanoi, Vietnam — marked “Privacy / GDPR”

Response Time: Within 72 hours for general queries; 30 days for formal GDPR requests

Supervisory Authority Complaints

If you are located in the EU/EEA and believe we have not handled your personal data in accordance with applicable law, you have the right to lodge a complaint with your local data protection supervisory authority: