Privacy Policy

This Privacy Policy describes how and when Helibrain ("we", "our", "us") collects, uses, and shares your information when you use our services. When using any of our services, you consent to the use of your information as described in this Privacy Policy.

Privacy by Design

Helibrain protects your privacy.

When using Helibrain, you will have the following options:

1. Questionnaire (optional). You will answer questions about your well-being, mood, and lifestyle. Helibrain processes these answers to provide recommendations based on your input. Your answers are used solely to improve the app and are never shared with third parties.

2. Habit Tracking (optional). You can track habits based on recommendations provided through the app (from the questionnaire) or habits you create manually, with the days, time, and amount (for example, "15 minutes") you choose. Habit tracking data is stored to enable functionality such as progress monitoring and reminders. If you answer "How sharp do you feel today?" (1 to 5), we store that daily rating to show your trends and to help the coach spot patterns; it is not part of your Brain Score. This data is used solely to provide the habit tracking service and is not shared with third parties.

3. Nutrition Logging (optional). You may log meals by uploading photos or entering text descriptions. Nutrition data, including meal logs, target calories, and nutrition scores, are used to provide tailored meal recommendations, upsides, downsides, and improvement tips. This data is used solely to provide and refine the nutrition feature and is not shared with third parties.

4. AI Coach Chat (optional). You may interact with an AI-powered coach through the in-app chat. Your messages are sent to third-party AI service providers to generate responses. We don't ask for medical information. Please don't share it in chat. If you do, it's stored with your conversation and processed by our AI provider only to answer you, and it's deleted when you delete your account. The AI coach may access your habits and habit schedules, your guided plan, your coach notebook, your past experiments, nutrition data, cognitive assessment results, and questionnaire status to provide personalized guidance. The coach keeps a short notebook about you (for example, your preferences, what works for you, and the pace you want), reads it before it answers or plans, and updates it as you go. The coach can add or change habits, habit schedules, and reminders when you ask it to, or after you confirm a change it proposes; we keep a record of these changes. When the coach asks you a question with answer buttons, we store the question and your answer, and the coach may use it later. Chat messages and usage metadata (such as token counts) are stored on our servers to maintain conversation history and improve the service. AI providers process your messages according to their own privacy policies but do not retain your data for training purposes under our agreements with them. Chat data is deleted when you delete your account. When you attach a photo or PDF document to a coach chat message, the file is sent to the AI service provider for analysis and stored on our servers as part of your conversation history for as long as your account exists. Attachments are permanently deleted when you delete your account. If an attached file becomes unavailable due to a technical issue, a placeholder is shown in chat in its place.

5. Guided Plan (optional, subscription). If you start the Guided plan, the coach builds a daily plan with you. We store your goal and the answers you give at the start (your starting ratings and whether you work night or rotating shifts, so the plan can leave out sleep-timing tasks). The plan setup does not ask about your health. We also store your daily tasks and whether you did each one (done, smaller version, skipped, or not recorded); your day ratings and check-ins; your weekly reviews; the pace you ask for; and your nudge time and nudge settings. The plan adapts automatically every day from this data (see "Automated personalization" below). The coach writes your nudges and picks their time from when you usually open the app, your reminder settings, and your time zone. When the plan starts, the coach's nudges replace your habit reminders; we save your earlier notification settings and restore them if the plan ends. Guided plan data is used solely to provide the plan and is not shared with third parties except as described below for AI processing.

6. Cognitive Assessments (optional). You can take short cognitive tests (reaction time, self-control, working memory, reasoning, and creativity). We record your responses during each test (including taps, answer choices, typed words for the creativity test, and response timings), the resulting scores, and session metadata (such as device model, app version, and time zone) to compute your results and show your personal trends over time. We may also use anonymized, aggregated assessment results to develop comparative context. For the creativity test, the words you type are processed by third-party AI service providers to compute a similarity-based score; under our agreements, providers do not retain this data for training. Cognitive assessment results are for educational purposes only — they are not medical diagnostics, and no IQ score is produced. This data is not shared with third parties except as described for AI processing, and is permanently deleted when you delete your account.

7. Health Data Integration (optional). You may connect your device's health platform — Apple Health on iOS or Health Connect on Android — to let Helibrain read your sleep (bedtime, wake time, total duration, and deep/REM stage minutes), heart rate variability (HRV), resting heart rate, and activity (daily steps, exercise minutes, and workouts with their type and duration). Access is read-only and permission-based: you choose which data types to grant, and Helibrain never writes to your health platform. Your phone computes one daily summary per metric and uploads only those daily aggregates to our servers — raw sensor samples never leave your device. We use this data solely to provide in-app features: your daily recovery status, sleep and HRV trends, associations between your recovery and your own cognitive test results, a positive-only recovery contribution to your Brain Score, automatically ticking a habit you track when your data shows you did it (for example, a workout ticks an exercise habit; you can untick it), AI coach answers about your sleep and recovery, and optional supportive notifications. Health data is never used for advertising, is never sold, and is not shared with third parties, except that your daily summaries may be processed by our AI service providers when generating coach responses — as with other coach data, providers do not retain it for training under our agreements. You can disconnect at any time in Profile → Connections (this stops all collection), revoke access in your device's health settings, or request deletion of your stored health data by emailing hello@helibrain.com. Health data is permanently deleted when you delete your account.

8. Voice Input (optional). In the coach chat you can speak instead of typing. Your speech is turned into text by your phone's speech recognition service (Apple's on iOS, Google's on Android), which may work on your device or send the audio to Apple or Google under their privacy policies, or on the web by your browser's speech service. The text appears in the message box so you can edit it before sending. We receive only the text you send; we do not receive or store voice recordings. The app asks for microphone permission (and, on iOS, speech recognition permission) the first time you use voice input.

9. Past Self-Experiments. Self-experiments are no longer offered as a separate feature. If you ran experiments before, we keep that data (experiment titles, daily check-ins, ratings, notes, and end-of-experiment insights) in your account until you delete your account, and the coach may read it as part of your history. We no longer collect new experiment data.

Purpose of the Service

Helibrain provides general educational insights. It is not a medical device and does not diagnose, treat, or provide medical advice. Cognitive tests and scores in the app are for educational purposes only — they are not medical diagnostics. Health metrics shown in the app (such as sleep, HRV, resting heart rate, and recovery status) are informational and educational only — they are not medical measurements, diagnoses, or alerts. Always consult a licensed healthcare provider for health concerns.

Children

You must be 18+ (or the age of majority in your jurisdiction) to use the Service.

Collection of information

We collect information you provide when you sign up for a Helibrain account, including:

Registration: email address, password hash (never your plain password), sign-in method (e.g., Google, Apple), basic account metadata.
Usage Information: app actions (e.g., feature taps, screens viewed), timestamps, device logs, crash reports.
Transaction Information: when you purchase our products via Google Play or the App Store, we collect metadata related to the transaction, such as the date of purchase, product name, and purchase confirmation details. Note that all payment data is processed securely by Google Play or Apple, and we do not store or process any payment card details.
Device & Locale: operating system, app version, language, country/time zone (from device settings).
Communications: if you email us, we keep your message and contact details to respond.
Habit Data: information related to habits you track or create, including habit names, schedules (days, planned time, and amount), progress updates, and reminders. This data is used solely to provide and improve the habit tracking feature.
Guided Plan Data (optional): your goal, your answers at the start of the plan (your starting ratings and whether you work night or rotating shifts), your daily tasks and their results (done, smaller version, skipped, or not recorded), day ratings and check-ins, weekly reviews, your preferred pace, your nudge time and nudge settings, the notification settings we saved when the plan started, and a record of changes the coach made to your plan, habits, and reminders.
Coach Notebook: short notes the coach keeps about you, such as your preferences, what works for you, and what you told it. The coach reads them to personalize your plan and replies.
Question Card Answers: questions the coach asked you with answer buttons, and the answer you chose or typed.
Voice Input: only the text you send after speaking; no voice recordings.
Past Experiment Data: if you ran self-experiments before they were retired, the experiment titles, categories, durations, daily check-in entries (did-it status, reasons for not doing, ratings, free-text notes), and end-of-experiment insights. This data is kept until you delete your account; no new experiment data is collected.
Nutrition Data: text/labels for meals, optional photos you upload, calorie targets, nutrition scores, and dietary feedback.
Cognitive Assessment Data: which tests you take and when, your in-test responses (taps, answer choices, typed creativity words, and response timings), computed test scores and levels, trend history, and per-session metadata (device model, app version, time zone). Creativity-test words are processed by third-party AI service providers to compute a score; providers do not retain this data for training under our agreements.
Health Data (optional): if you connect Apple Health or Health Connect, daily summaries of your sleep (start and end time, total minutes, deep and REM minutes), heart rate variability (including which HRV metric your platform reports), resting heart rate, daily steps, exercise minutes, and workouts (type and duration), plus your connection status (platform, granted data types, last sync time). Raw sensor samples are processed on your device and are never uploaded.
AI Coach Chat Data: messages you send to and receive from the AI coach (including messages the coach sends on its own, such as daily tasks, nudges, and weekly reviews), token usage metrics, conversation history, and any photos or PDF documents you attach to messages. Messages are processed by third-party AI service providers to generate responses. Attachments are stored on our servers for the lifetime of your account so you can view them later in your chat history; they are permanently deleted when you delete your account.
Product Analytics and Session Replay: to understand how the app is used and to find and fix problems, we record app usage events (such as screens viewed, taps, scroll depth, time on screen, feature actions, and errors shown) together with a random session identifier and a random device identifier. We may also record sessions as a sequence of screen images ("session replay"). Session replay runs on our own servers, not a third-party analytics service. Before anything leaves your device, all text, text input fields, and images are masked, and screens containing your coach chat, nutrition, health data, profile, and questionnaire answers are hidden entirely. Session recordings are kept for 30 days. We also use Google Firebase Analytics for aggregated app statistics. You can turn all of this off at any time in Profile → "Share usage analytics"; this stops usage events, session replay, and Firebase Analytics on that device. Analytics data is never used for advertising and never sold, and it is deleted with your account.
Third-Party Services: if you sign in with Google or Apple, we receive your account email (and for Apple Sign In, you may choose to hide your email, in which case we receive a private relay email address) and your provider account identifier, which we store to link your sign-in to your Helibrain account.

Subscription & Purchase Information

When you buy a subscription through Google Play (and/or the App Store), we receive non-payment purchase metadata from the store—e.g., product ID, price, currency, purchase token/receipt, trial status and eligibility, renewal/cancel date, and status (active/paused/canceled). We do not receive or store full payment card details. We use this data to:

unlock the Guided plan and restore purchases across devices,
prevent fraud and provide support, and
meet accounting/tax/legal obligations.

When you complete a one-time lifetime in-app purchase (the Self-Guided unlock), we receive and store similar non-payment metadata from the store—product ID, transaction ID, purchase date, and platform (iOS/Android)—tied to your Helibrain account. We use it to:

grant the unlocked feature on your account permanently,
restore the purchase on additional devices and reinstalls when you sign in,
handle refund or revocation events from the store.

We do not receive or store payment card details for any purchase.

Use of information

We collect information to provide, analyze and improve our services.

We use information to provide and personalize features (questionnaire results, habit reminders, nutrition tips, the guided plan, and coach nudges).

Automated personalization: if you use the Guided plan, your plan adapts automatically every day. Software and our AI service providers use your task results, check-ins and ratings, the pace you ask for, your coach notebook, and when you usually open the app to choose the size and timing of today's task and the time of your nudge. This only shapes your wellness tasks and reminders; it does not make decisions that have legal or similarly significant effects on you. Changes to which habits and items are in your plan need your confirmation, and you can change the pace or nudge time, or stop the plan, at any time.

We send push notifications and in-app messages you have allowed, such as habit reminders, coach nudges, and account and billing notices. You can turn notifications off in the app or in your device settings.

We store data until it is no longer necessary to provide our services, or until your account is deleted. We retain limited registration information related to your order history as long as your account is active or as needed to provide you services, as well as for accounting, audit and compliance purposes.

If you email us, we will keep the content of your message, your email address, and your contact information to respond to your request.

We may send you informational, behavioral, and occasional promotional emails about your activity, lifestyle tips, new features, and account updates, as well as account-related notices such as password resets and account deletion confirmations.

You may opt out of receiving promotional messages from Helibrain by following the instructions in those messages or by changing your notification settings by logging into your Helibrain account. If you decide to opt out, we may still send you non-promotional communications, such as technical support or administrative messages.

Sharing of information

Protecting your personal information is important to us and we neither rent nor sell your personal information to anyone. However, we provide information to service providers who support our business, such as by providing technical infrastructure services, analyzing how our products are used, providing customer service, facilitating payments or conducting surveys. This includes third-party AI service providers that process your chat messages to power the AI coach feature, and the data the coach uses to adapt your guided plan each day, write your nudges, and prepare your weekly reviews. These providers act as data processors on our behalf and process your data solely to generate responses — they do not use your data for their own training or other purposes under our agreements. The servers of such services might be hosted in the United States of America.

Your consent to this Privacy Policy followed by Your submission of such information represents Your agreement to that sharing.

Account Deletion

In compliance with GDPR and CCPA, you can request the deletion of your account and all associated personal data at any time.

To delete your account:

Go to your Helibrain account profile and select "Delete Account".
Alternatively, email us at hello@helibrain.com with your request.

Your account is deleted 14 days after your request, in case you change your mind or the request was not made by you: signing in again during those 14 days cancels the deletion. When the account is deleted, your product analytics data (usage events and session recordings in our self-hosted PostHog) is deleted at the same time.

Once processed, your data will be permanently deleted, including your guided plan, coach notebook, question card answers, and past experiment data, except for legally required records. Deleting your account does not cancel a subscription bought in the App Store or Google Play; cancel it in your store subscription settings.

Legal Basis for Processing Personal Data (GDPR)

We process your personal data based on the following:

Consent: You agree to the collection and processing of data when you use Helibrain.
Performance of a Contract: To provide our service as outlined in this policy.
Legal Obligations: To comply with regulatory requirements.
Legitimate Interest: For app improvement, security, and fraud prevention.

You have the right to:

Access, correct, or delete your personal data.
Withdraw consent at any time. Note that withdrawing consent for essential data processing may limit your ability to use some or all features of the Helibrain service.
Object to or restrict data processing.

Data Retention

We keep personal data only as long as needed to provide the Service or comply with law.
Purchase/receipt records and related billing metadata may be retained for the period required by tax, accounting, or other legal obligations (often 3–10 years).
When you delete your account, we permanently delete in-app data (questionnaire, habits, guided plan, coach notebook, question card answers, nutrition, chat history, cognitive assessment results, health data, past experiment data). We may retain anonymized, non-identifiable aggregates for analytics.

Your Rights Under CCPA (California)

If you are a California resident, you have the right to:

Know what personal data we collect and how we use it.
Request deletion of your data.
Opt out of data sales (we do not sell your data).

To exercise your rights, contact us at hello@helibrain.com.

Amendment

We may update this Privacy Policy from time to time to reflect changes in legal, regulatory, or operational requirements. We encourage you to review this Privacy Policy periodically to stay informed of any updates. Continued use of the Helibrain service after any changes will constitute acceptance of the updated Privacy Policy.

If you disagree with any part of the updated policy, you may cancel your use of the Helibrain service and delete your account as described in the "Account Deletion" section.

Contact

You can contact us with any questions or concerns regarding this Privacy Policy. Helibrain’s business address is Jadranska 46, 1, 26000, Pančhevo, Serbia. You can also exercise your rights by sending an email to hello@helibrain.com.

Date of Last Revision: October 26th 2026