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Privacy policy

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This policy explains how MentalWave: Binaural Beats (“MentalWave”), our app for iPhone (App Store) and Android (Google Play, package com.mentalwave.app), and this website, mentalwave.app, handle your data. MentalWave is made by Yellow Cat Labs (“we”). You can reach us at contact@yellowcatlabs.com.

In short: MentalWave does not require an account, does not show ads and does not use your device’s advertising identifier (IDFA on iPhone, advertising ID on Android). We do not sell your data.

The MentalWave app

Data we collect

  • App usage (analytics). We use Mixpanel to collect usage events, such as which screens and sounds are opened, onboarding answers and whether a subscription was started. Events are linked to a random identifier created on your device, not to your name or email address.
  • Your wellness goal. During onboarding you can choose a goal (for example sleep, relaxation, focus, ringing ears or migraine days). This choice is stored on your device to personalise the app, and sent to Mixpanel with your usage events so we can understand how the app is used. We do not collect any medical records or diagnoses.
  • Approximate location. Mixpanel may infer your approximate location (country and city) from your IP address. We do not collect precise location.
  • Purchases. Subscriptions are processed by Apple (App Store) or Google (Google Play). RevenueCat receives your purchase records (product, dates, status) with a random identifier so we can unlock MentalWave Premium and restore your purchases. We never receive your payment details.

Data that stays on your device

Your favourites, mixes, settings, reminders and sleep timer preferences are stored only on your device. Reminders are scheduled locally; we do not send push notifications from a server.

How we use and share data

We use this data to run the app (unlocking Premium, restoring purchases) and to improve it (analytics). Mixpanel and RevenueCat process data on our behalf as service providers; we do not sell your data or share it with third parties for advertising. Data is encrypted in transit. These providers may process data outside your country, including in the United States, under appropriate safeguards.

This website

  • Launch waitlist (closed). If you joined the waitlist before launch, we stored your email address, the version you asked for (iPhone or Android), your country, the page and campaign link you came from, and a one-way hash of your IP address (used only to block spam). Your address is used only to tell you that MentalWave is available, is never shared, and is deleted once that e-mail is sent. It is stored with Cloudflare, which hosts this site.
  • Visit statistics. We count page views and button clicks with Mixpanel, without cookies and with an identifier that lasts for one page view, so we cannot recognise you from one visit to the next. We also use Google Analytics, which sets cookies to measure visits and may infer your approximate location from your IP address. You can block these cookies in your browser settings.

Deleting your data and your rights

You can ask us to delete the data collected through MentalWave or this website at any time by writing to contact@yellowcatlabs.com with the subject “MentalWave data deletion”. We will delete your analytics and purchase records held by our providers, or remove your address from the waitlist, and confirm by email. Uninstalling the app removes all data stored on your device.

Cancelling a subscription is done in your store account: on iPhone in Settings, then your name, then Subscriptions; on Android in Google Play, under Payments & subscriptions.

Depending on where you live, you may also have the right to access, correct or receive a copy of your data, to object to its use, and to complain to your data protection authority. Write to us and we will answer within 30 days.

Age

MentalWave is intended for adults (18+) and is not directed at children.

Health notice

MentalWave produces sounds for relaxation and well-being. It is not a medical device and does not diagnose, treat or replace any treatment for any condition.

Changes to this policy

If we change this policy, we will update it on this page and change the date at the top.