MemoryMateRix

Privacy Policy

Effective Date: 18 March 2026

1. Introduction

G'day! Welcome to MemoryMateRix, your private personal memory assistant. This Privacy Policy explains how the MemoryMateRix app handles your information. We want to be completely upfront: we don't collect your personal data, we don't send it anywhere, and we never will.

MemoryMateRix is built on a simple promise — your memories stay yours.

2. Who We Are

MemoryMateRix is developed by Michael (an independent Australian developer). If you have any questions about this policy, you can contact us at:

Email: hello@memorymaterix.com.au

Website: memorymaterix.com.au

3. Data We Do Not Collect

To be crystal clear, MemoryMateRix does not collect, transmit, share, sell, or analyse any of the following:

• Your private memories or notes

• Your private contacts

• Your private calendar events

• Your private lists or reminders

• Your voice recordings or voice commands

• Your location

• Your device identifiers or advertising IDs

• Any usage analytics or behavioural data

There are no third-party analytics SDKs, advertising networks, or tracking libraries in this app.

4. Data Stored on Your Device

All data you enter into MemoryMateRix is stored exclusively on your own device. This includes your:

• Private Memories and notes you save

• Private Contacts you add

• Private Calendar events you create or import

• Private Shopping lists and list items

• Private Reminders and scheduled notifications

• Your app settings and preferences

This data never leaves your device unless you choose to create a manual backup (see Section 7). It is encrypted using military-grade AES-256 encryption via SQLCipher, meaning it is unreadable to anyone who does not have your password.

5. Permissions We Request and Why

MemoryMateRix requests the following device permissions. Each one is explained plainly below.

Microphone

Used exclusively so you can speak to Rix, your personal assistant, using your voice. Voice processing happens entirely on your device — your voice is never sent to a cloud server or external service. The microphone is only active when you are actively speaking to Rix.

Contacts (Read only)

Used to allow you to sync your existing Contacts from your phone’s system Contacts with MemoryMateRix. You can easily add these as Private Contacts. Once imported, those contacts are stored in your encrypted local vault. You may then choose to delete the originals from your system contacts to make them fully private. MemoryMateRix does not upload or share your Contacts with anyone.

Calendar (Read only)

Used to allow you to sync your existing Calendar Events from your phone's system Calendar with MemoryMateRix. You can easily add these as Private Events. Once imported, those Events are stored in your encrypted local vault. You may then choose to delete the originals from your system calendar to make them fully private. MemoryMateRix does not upload or share your Calendar data with anyone.

Phone (Call)

Used only when you ask Rix to call one of your Private Contacts by voice command (e.g. "Call John"). This opens your phone's dialler app — MemoryMateRix does not make calls itself and does not log call history.

SMS / Messaging / Email

Used only when you ask Rix to send a message to one of your Private Contacts by voice command (e.g. "Message Sarah" or “Email Sarah”). This opens your phone's messaging app — MemoryMateRix does not send messages itself and does not read or log your messages.

Notifications

Used to deliver reminders you set within the app. Reminder content is generated locally on your device and is not transmitted anywhere.

6. Contact & Calendar Privacy — How It Works

MemoryMateRix gives you two ways to use your existing contacts and calendar events privately:

Option A — Full Privacy (Recommended)

Import the contact or event into MemoryMateRix, then delete the original from your phone's system apps. The information now exists only in your encrypted MemoryMateRix vault. It will no longer sync to Google, Apple, or any other cloud service.

Option B — Shared but with Private Notes

Keep the contact or event in your phone's system apps (so it remains available for sharing or syncing), but add private notes to it inside MemoryMateRix. The contact or event remains in your system, but your private notes about it are stored only in your encrypted vault and are never synced or shared.

Option C — Shared but with Private Copy

Keep the contact or event in your phone's system apps (so it remains available for sharing or syncing), but make a private copy inside MemoryMateRix. The contact or event remains in your system, but your private copy is stored only in your encrypted vault and never synced or shared. You can add additional private information. Rix your personal assistant uses this copy, as you can, to make calls, send messages or email.

This three-tier approach gives you flexibility — you choose what level of privacy is right for each piece of information.

7. Backup and Restore

MemoryMateRix includes a manual Backup & Restore feature. When you create a backup:

• Your Vault backup (.bak) file is saved to your downloads folder

• The backup file remains encrypted and password-protected

• Save your backup file to multiple external devices locations e.g. USB stick or PC

• MemoryMateRix does not upload backups to any cloud service

It is your responsibility to manage where your backup file is stored. If you choose to move it to a cloud storage service (such as Google Drive or iCloud) yourself, that is your decision and falls outside the scope of this app. We recommend keeping backups in a secure, private location.

If you uninstall MemoryMateRix without creating a backup, your data is permanently deleted from your device and cannot be recovered.

8. Voice Processing

All voice recognition and processing in MemoryMateRix is handled by your device's built-in on-device speech recognition engine (Android Speech Recognition). Your voice is processed locally on your phone's hardware. Rix does not use any external AI cloud service, and your voice data is never transmitted or stored.

9. Security Measures

MemoryMateRix employs multiple layers of protection to keep your data secure:

• AES-256 database encryption via SQLCipher

• Hardware-backed encryption keys — a unique 256-bit key is generated for each installation and stored in your device's dedicated security hardware (Android Keystore)

• Screen protection (FLAG_SECURE) — prevents other apps from taking screenshots of your data

• Secure input — copied text is cleared immediately after one use, preventing other apps from accessing your sensitive data

• App Switcher masking — your data is hidden in the Android Recent Apps list

• Root detection — the app verifies it is not running on a rooted device

10. Children's Privacy

MemoryMateRix is not directed at children under the age of 13. We do not knowingly collect any information from children. If you believe a child has used this app, there is nothing to be concerned about in terms of data collection; no data is transmitted regardless of the user's age.

11. Changes to This Policy

If we ever update this Privacy Policy, we will update the Effective Date at the top of this document and notify users via the app. Because we do not collect contact information, in-app notification is our primary method of communication.

We do not anticipate material changes to this policy, as our core commitment — your data stays on your device — is fundamental to the design of this app.

A note from Michael

MemoryMateRix donates 25% of profits to the University of Tasmania’s Wicking Dementia Research and Education Centre. Dementia is fast becoming known as the public health concern of the 21st Century. Your support of this app directly contributes to that cause. Thank you for trusting us with your memories — we take that trust seriously.