MindTwice is a brain-training and memory app operated by Backoffiz LLC ("we", "us"). It offers cognitive assessments, brain-training games, a voice journal with memory-recall sessions led by a voice companion called Lily, lifestyle tracking, and insights. This policy explains what information the app handles, where it is kept, who else sees it, and the choices you have. It covers the MindTwice app and the mindtwice.com website.
The short version. Most of what you put into MindTwice stays on your phone: your journal and its recordings, your check-ins and lifestyle logs, and anything the app reads from Apple Health or Health Connect. Our servers keep your account, the answers you give when you set up the app, and your assessment and game results. AI features send journal content to Google Gemini and ElevenLabs, and only after you allow it; data from Apple Health or Health Connect is never sent to them. We show no ads, use no analytics or tracking tools, and never sell your data. You can delete your account and its data from inside the app at any time.
The following is stored in the app's private storage on your phone. We do not receive it, except in the specific cases described in sections 4 (AI features), 5 (speech recognition) and 6 (backups).
Our backend runs on Supabase. It holds only the following:
| Data | What it includes | Why |
|---|---|---|
| Account | Email address, account ID, and how you sign in (email and password, Google, or Apple). If you sign in with Google or Apple, the name on that account may be passed to us. Passwords are handled by our authentication provider; we never see them in plain text. | To sign you in and run your account. |
| Profile and setup answers | Your name, age range, what brings you to MindTwice (for example stay sharp, peak performance or just curious), how you'd rate your sleep, your activity level and your daily goal. | To personalize the app. These are the answers you chose during setup, not data read from Apple Health or Health Connect. |
| Assessment and game results | For each baseline assessment, reassessment and game session: the score, how long it took, when you played, and performance details such as reaction times, items recalled, accuracy and difficulty level. For the word-recall test, the words you typed. | So your score history survives a reinstall or a new phone, and for the anonymous comparison described below. |
| Subscription | The product you bought, purchase and expiry dates, platform, and the purchase token issued by Google Play or the App Store. | To check and restore your subscription. |
| AI usage counts | How many AI and voice requests your account made each day. No content. | To stop abuse of the AI services. |
| Push notification token | A token that identifies the app on your device for notifications, the platform (Android or iOS), and your time-zone offset. | To deliver notifications at a sensible local time. |
| Creator code (if any) | The creator code linked to your account, when it was added, and how (typed by you, matched to the email you left on a creator's page, or, on Android, read from the Google Play link you installed from). See "Creator codes and links" below. | To credit the creator who sent you. It never changes your price or what you can use. |
| Journal backup key | A random encryption key for the journal backup described in section 6. It is a key, not journal content. | So only your signed-in account can read your journal backup. |
Anonymous comparison. To show how your assessment score compares with other MindTwice users, our server calculates an average and a percentile from everyone's latest assessment score. You see only those totals and your own score; no one can see another user's results.
Launch waitlist. If you joined the waitlist on mindtwice.com, we store your email address and which page you signed up on. We use it only to email you about MindTwice's launch, never share it, and delete it on request.
Creator codes and links. Some people who talk about MindTwice online have a creator code, and we share subscription revenue with them. If you open a creator's link (mindtwice.com/c/…), we record the visit as the code, your device type (Android, iPhone or other) and the time, with no IP address or other identifier. If you leave your email there, we store it with the creator's code and use it to send you the first-week guide (and MindTwice news only if you tick that box); when you later create a MindTwice account with the same email, or type the code in the app, your account is linked to that creator. On Android, if you installed MindTwice from a creator's Google Play link, the app reads the code from that link and shows it to you during setup; it is only added if you continue with it. A code is for credit only: it never changes your price or what you can use. Creators see totals only (visits, sign-ups, trials, paying subscribers and their earnings), never your name or email, and months with fewer than three sign-ups are hidden. An email left on a creator page that never becomes an account is deleted after 90 days, unless you also asked for MindTwice news.
We do not keep your journal, recordings, check-ins, lifestyle logs or data from Apple Health or Health Connect on our servers. We do not collect your location, contacts, photos, advertising ID or browsing history, and the app contains no advertising, analytics or crash-reporting tools.
We do not sell your personal information, use it for advertising, or share it with data brokers. MindTwice is a wellness and brain-training app.
Some journal features use AI. Before any of your content is sent, the app asks for your permission once. You can change your answer at any time in Settings → AI processing. While it is off, nothing is sent to these services: your journal still records and keeps the phone's own transcript, and insights are worked out on your phone instead, but recall sessions and AI-written questions do not run.
When AI processing is on, the app sends content to these providers through our own servers. The app holds no AI keys of its own.
Data from Apple Health or Health Connect is never sent to any AI service, whether or not AI processing is on. What you say in a journal entry is sent as you said it, so anything you mention there goes to Gemini with the rest.
Our servers pass this content to the provider and return the result; they do not store it. Each provider processes it under its own API terms. We use Google's paid Gemini API, under whose terms Google does not use the content to train its models; providers may keep content for a limited time for abuse monitoring or legal reasons, as their terms allow. We do not use your content to train AI models.
While you record a journal entry or answer a recall question, the app shows a live transcript using your phone's built-in speech recognition (Google's on Android, Apple's on iOS). Depending on your phone and settings, that service may process the audio on Google's or Apple's servers under their own terms. This is part of your phone's operating system, it happens whenever you record, and it is separate from the AI setting in section 4.
Your phone's own backup. If your phone's backup is turned on (Google backup on Android, iCloud Backup on iPhone), it includes one small file from MindTwice: a copy of your journal's text — entries, transcripts, summaries, recall questions and results, and the people and places Lily knows from your journal — so your journal can come back after a reinstall or on a new phone. On Android the same file also moves across when you transfer to a new phone. The file is encrypted with a key kept on our servers for your account, so it can only be read when you sign in to MindTwice; Google and Apple cannot read its contents. You control the backup in your phone's settings; we never receive it.
Everything else MindTwice keeps on your phone is left out of that backup: on Android, the app includes only that one file; on iPhone, the app marks its database, recordings and cached voice clips to be skipped by iCloud Backup. So your recordings, check-ins, lifestyle logs and data from Apple Health or Health Connect are not in your phone's backup on either platform. On iPhone, iCloud Backup does keep the app's basic settings, as it does for every app (for example your theme and a copy of your profile: name, age and the answers you gave during setup, which are also stored with your account, section 2).
Google Drive backup (optional, Android). If you tap Back up to Google Drive in the journal's storage settings, or turn on automatic backup there (daily or weekly), your recordings and a file with your entries' details (titles, transcripts, dates, and what Lily has learned from them) are copied to a hidden MindTwice folder in your own Google Drive. We never receive this copy. Google's terms apply to it. It is deleted with your account (section 11), and you can also remove it yourself in Google Drive under Settings → Manage apps.
Saving recordings yourself. You can save a recording out of the app through your phone's share sheet, or save all of them at once from the journal's storage settings (to a folder you choose on Android, or through the share sheet on iPhone). Once saved there, those copies are outside MindTwice and are not deleted when you delete your account.
PDF report. Settings → Export data creates a PDF report on your phone. It goes wherever you choose to share or save it.
Connecting Apple Health or Health Connect is optional. If you choose to, MindTwice reads your sleep, steps and exercise. (When it reads an exercise session, Health Connect also returns that session's distance and calories; MindTwice does not keep or show them.) It never writes to Apple Health or Health Connect.
MindTwice's use of data from Health Connect follows the Health Connect Permissions policy, including its Limited Use requirements, and its use of HealthKit follows Apple's HealthKit rules. You can stop access at any time in Apple Health or Health Connect settings.
Reminders you set are scheduled on your phone. Notifications sent from our servers are delivered through Firebase Cloud Messaging (Google) and, on iPhone, Apple Push Notification service, which handle the message and your device's push token to deliver it. The token is deleted from our servers when you delete your account, and tokens that stop working are removed automatically. You can turn notifications off in your phone's settings.
Subscriptions are sold and billed by Google Play or the App Store. We never see or store your card or bank details. We receive a purchase token from the store and check it with Google or Apple to confirm your subscription. Deleting your MindTwice account does not cancel a subscription; cancel it in your Google Play or App Store subscription settings.
We use these service providers to run MindTwice. They process data on our behalf, for the purposes above:
Your phone's own services (speech recognition, Apple Health, Health Connect, Google backup, iCloud Backup, Google Drive) are provided to you by Google or Apple under their terms, as described above.
The Supplements section links to products on other websites. If you follow a link, that website's own privacy policy applies.
We may disclose information if the law requires it, or to protect the rights, safety or security of our users, the public or MindTwice.
We keep the server data in section 2 for as long as your account exists. Data on your phone stays until you delete it, delete your account or uninstall the app.
You can delete your account in Settings → Delete account. This:
Deletion is permanent. If you used MindTwice on another phone, uninstall it there to remove that phone's copy. Signing out does not delete data on your phone. An email you left on our website (the waitlist or a creator's page) is kept separately from your account; email us to delete it. Google and Apple keep their own records of purchases. Our hosting providers keep routine technical logs (for example, request times and IP addresses) for a limited period for security and troubleshooting.
If you can no longer use the app, email contact@mindtwice.com from the address you signed up with and we will delete the account for you. See also mindtwice.com/delete-account.
Depending on where you live, you may have the right to access, correct, download or delete your personal information, and to object to or restrict some processing. In the app you can:
For anything else, including a copy of the data we hold on our servers, email contact@mindtwice.com. You may also complain to your local data protection authority.
All data sent between the app and our servers is encrypted in transit (HTTPS/TLS). Our database only lets each account read its own records. AI keys and account-deletion operations exist only on our servers. Your journal is not stored on our servers at all. No system is completely secure, but we work to protect your information.
MindTwice is for adults aged 18 and over. It is not directed to children, and we do not knowingly collect personal information from anyone under 18. If you believe someone under 18 has given us personal information, contact us and we will delete it.
Our servers are in the United States, and our service providers may also process data in other countries, so your data may be processed outside the country where you live. Where we do, we rely on the providers' contractual safeguards and compliance frameworks.
We will post changes on this page and update the effective date. If a change is significant, we will also tell you in the app.
Backoffiz LLC
200 University Blvd, Suite 225-281
Round Rock, TX 78665, USA
contact@mindtwice.com