Last updated: August 10, 2026
Here's what you should know in 30 seconds:
The data controller for your personal data is:
Neziak Studio, a French société par actions simplifiée (simplified joint-stock company) with a share capital of EUR 1,000 Registered office: 144 avenue Charles de Gaulle, 92200 Neuilly-sur-Seine, France Registered with the Nanterre Trade and Companies Register under number 107 967 606 Contact: info@neziakstudio.com
Any request regarding your personal data can be sent to the email address above. We commit to responding within one month maximum, in line with applicable regulations.
During sign-up and the onboarding journey, you provide us with:
For your information, Taiji never collects:
| Purpose | Data involved | Legal basis (GDPR art. 6) |
|---|---|---|
| Personalize your practice program | Goals, areas to take it easy on, age, gender | Performance of a contract (art. 6.1.b) |
| Manage your account and subscription | Apple ID, email, subscription status, transactions | Performance of a contract (art. 6.1.b) |
| Send you practice reminders | Reminder time, APNs/FCM token | Consent (art. 6.1.a, via iOS prompt) |
| Ensure security and prevent fraud | IP address, device identifiers | Legitimate interest (art. 6.1.f) |
| Improve our app | Firebase Analytics events | Consent (art. 6.1.a), see section 9.3 |
| Measure the effectiveness of our ad campaigns | IDFA, Meta events | Explicit consent (art. 6.1.a), via our privacy settings and the ATT prompt |
| Keep proof of your privacy choices | Choices per purpose, date, version of the text | Legal obligation (art. 6.1.c, pursuant to art. 7.1) |
| Comply with accounting obligations | Transaction history | Legal obligation (art. 6.1.c) |
We rely on technical service providers (called processors) to operate the service. Each of them is bound by a Data Processing Agreement requiring them to process your data only on our instructions and with appropriate security.
| Provider | Role | Country | Safeguards |
|---|---|---|---|
| Apple Inc. | Authentication (Sign in with Apple), App Store, payments, push notifications | USA + Europe | Data Privacy Framework + Standard Contractual Clauses |
| Google LLC (Firebase) | Authentication, database, storage, usage analytics, notifications, hosting of our public legal pages | USA + Europe | Data Privacy Framework + SCCs |
| Google LLC (User Messaging Platform) | Presenting and recording your privacy choices | USA + Europe | Data Privacy Framework + SCCs |
| RevenueCat Inc. | Subscription and receipt management | USA | Data Privacy Framework + SCCs |
| Meta Platforms Inc. | Ad attribution and campaign measurement | USA | Data Privacy Framework + SCCs, only if you allow ad tracking |
| Google Workspace | Hosting of our contact email (info@neziakstudio.com) | USA | Data Privacy Framework + SCCs |
We do not sell your personal data and never share it with other third parties for commercial purposes.
One note about our consent tool. The tool we use to present your privacy choices (Google User Messaging Platform) is only distributed as part of Google's advertising software kit. That kit is therefore technically present in the app, but it is configured never to activate: no advertising is displayed in Taiji, and the app contains no ad space.
Some of our providers are based in the United States, so your data may be transferred outside the European Union.
For these transfers, we rely on:
If you'd like a copy of these safeguards, write to info@neziakstudio.com.
| Type of data | Retention period |
|---|---|
| User account, profile, preferences, practice history | Duration of your account + 12 months after its deletion |
| Transaction history | 10 years (French accounting obligation) |
| Support emails received at info@neziakstudio.com | 3 years after your last interaction |
| Technical logs (IP address, errors) | 12 months maximum |
| Firebase Analytics events | 14 months |
| IDFA data and Meta events | 24 months maximum |
| Record of your privacy choices | Duration of your account + 3 years |
At the end of these retention periods, your data is either permanently deleted or anonymized.
Under applicable regulations, you have the following rights regarding your personal data:
By email: write to info@neziakstudio.com. Specify your request and include proof of identity if necessary.
In the app: two actions are directly in your hands.
Response time: one month maximum, extendable by two months if your request is complex (we'll let you know).
Right to complain: if you believe your rights aren't being respected, you can file a complaint with the relevant supervisory authority (see Appendices based on your country of residence).
We put in place technical and organizational measures to protect your data:
In the event of a data breach presenting a risk to your rights and freedoms, we will inform you as soon as possible, and notify the relevant supervisory authority within 72 hours.
We present your privacy choices during onboarding, before any of the collection they cover begins. Two purposes are offered, each adjustable independently of the other:
| Purpose | What it covers |
|---|---|
| Usage analytics | Understanding how the app is used, so we can improve it (Firebase Analytics) |
| Advertising and attribution | Knowing whether you discovered Taiji through one of our ads (Meta SDK, IDFA) |
You can change your choices at any time, purpose by purpose, from the Settings > Privacy screen in the app. Withdrawing consent is as easy as giving it, and has no effect on your access to the service. Closing the choice screen without selecting anything does not count as acceptance.
Depending on where you live, this works differently:
We keep a record of your choices (purposes accepted or declined, date, version of the text shown). This is a legal requirement: we must be able to demonstrate that your consent was properly obtained.
During onboarding, we offer to enable a daily practice reminder. This consent is requested via iOS's native prompt. You can withdraw it at any time from your iPhone's Settings > Notifications > Taiji.
To understand how our app is used and improve it, we use Firebase Analytics. The collected data is:
This measurement relies on your consent to the "usage analytics" purpose described in section 9.1. You can withdraw it at any time from Settings > Privacy, or by writing to info@neziakstudio.com.
We use the Meta SDK to measure the effectiveness of our ad campaigns (for instance, to know whether you discovered Taiji through an Instagram ad). This measurement relies on IDFA, the advertising identifier provided by your iPhone.
In the European Economic Area and the United Kingdom, it only happens if two conditions are met: you have accepted the "advertising and attribution" purpose in section 9.1, and you have accepted the "App Tracking Transparency" prompt displayed by iOS. If either one is missing, no data is transmitted to Meta.
If you decline, no individualized ad tracking takes place. We can then only use aggregated, anonymous measurements, via Apple's SKAdNetwork.
This purpose covers attribution measurement only. We do not build an advertising profile about you, and we do not serve personalized advertising.
The Taiji app is reserved for people 18 years of age or older. We do not knowingly collect data from minors. If you believe a minor has provided us with data, contact us at info@neziakstudio.com: we will delete it promptly.
We may update this privacy policy to reflect:
In the event of a substantial change, we'll notify you via in-app notification and/or email. The current version, with its last updated date, is always available at:
https://legal.taiji.neziakstudio.com/en/privacy
Our Terms of Use are available at https://legal.taiji.neziakstudio.com/en/terms.
For any question regarding your personal data or this policy:
Email: info@neziakstudio.com Mail: Neziak Studio, 144 avenue Charles de Gaulle, 92200 Neuilly-sur-Seine, France
If you are a resident of the State of California (USA), you have additional rights under the California Consumer Privacy Act (CCPA) as amended by the California Privacy Rights Act (CPRA).
We collect the following categories of personal information:
We do not collect "sensitive" categories under the CPRA (racial origin, opinions, medically qualified health data, biometric data, sexual orientation, etc.).
We do not sell your personal information. We also do not share it for cross-context behavioral advertising without your explicit consent.
If you enable ad tracking (ATT), certain information (IDFA, pseudonymized purchase events) is shared with Meta for attribution purposes. You can opt out at any time by revoking your ATT authorization in your iPhone Settings > Privacy > Tracking.
The Settings > Privacy screen in the app is the designated opt-out channel for California residents. It lets you turn off usage analytics and advertising and attribution at any time, independently of each other. No prior step or proof of identity is required, and exercising this right does not affect your access to the service.
You may also write to us at info@neziakstudio.com with the subject "CCPA Request".
To exercise these rights, write to info@neziakstudio.com with the subject "CCPA Request".
You may also file a complaint with the California Attorney General's Office or the California Privacy Protection Agency.
This appendix supplements the main policy for users protected by the General Data Protection Regulation (GDPR) or UK GDPR.
You may file a complaint with the relevant supervisory authority in your country:
We do not carry out any automated decisions producing legal effects or significantly affecting you within the meaning of GDPR Article 22. The personalization of your program does not constitute an automated decision under the regulation: it is the direct result of your choices declared during onboarding.
Given the size of our structure and the nature of our processing, we have not appointed a DPO. All requests must be sent to info@neziakstudio.com.
In accordance with Law 25 modernizing the provisions on personal information protection (Quebec), you have the following rights:
Person responsible for personal information protection: the President of Neziak Studio, reachable at info@neziakstudio.com
In accordance with the Personal Information Protection and Electronic Documents Act (PIPEDA), you have equivalent rights. You can file a complaint with the Office of the Privacy Commissioner of Canada, priv.gc.ca.
As a user residing in Australia, your personal data is protected by the Privacy Act 1988 and the Australian Privacy Principles (APPs).
You have the following rights:
As a user residing in New Zealand, your personal data is protected by the Privacy Act 2020 and the New Zealand Information Privacy Principles (NZIPPs).
You have the following rights: