Privacy Policy

Effective Date: September 9, 2026

AQ Zentrix Ltd ("AQ Zentrix", "we", "us", "our") operates the AQ Invoice mobile application (the "App"). This Privacy Policy explains what information we collect, how we use it, who we share it with, and the choices you have.

• Account information. If you create an account, we collect your email address and a securely hashed password used to authenticate you. We never store your password in plain text.
• Business and invoice data. Information you enter into the App — invoices, estimates, line items, client details, business profiles, tax and discount settings, custom field labels, and logo images. This is stored on your device. If you sign in and enable cloud sync, it is also stored in our cloud database and file storage so it is available across your devices.
• Payment-collection data (optional). If you connect a Stripe account to accept card payments on your invoices, we store your Stripe account identifier and, for each invoice you send a payment link for, the Stripe-hosted Checkout URL and its status (pending / paid). We never receive, see, or store your clients' card numbers, CVV, or billing addresses — that information is entered on Stripe's hosted checkout page and handled entirely by Stripe.
• Subscription data. If you buy an AQ Invoice Pro subscription, we receive a purchase token and status (active plan, renewal date) from Google Play so we can unlock the corresponding features. Payment card details are handled by Google, not by us.
• Usage and diagnostic data. Anonymized product-usage events (for example: an invoice was created, an estimate was emailed, the theme or language was changed) and crash / error reports. These do not include the contents of your invoices, clients, or business data.
• Device token for notifications. If you allow notifications, we store a Firebase Cloud Messaging device token linked to your user ID, so we can notify your device when an invoice is paid online and prompt the App to refresh.
• Device permissions. The App may request access to your photo library or camera so you can add a business logo. Images are used only for the purpose you initiate.

• Provide and operate the App — creating invoices and estimates, managing clients and items, generating PDFs
• Sync your data across your devices when you are signed in
• Unlock paid features when you hold an active subscription
• Send a notification when one of your invoices is paid online
• Diagnose crashes and improve stability and performance
• Understand which features are used to guide product improvements
• Detect and prevent fraud, abuse, and violations of our Terms of Service

We do not sell your personal information, and we do not use your data for cross-app advertising or tracking.

We use the following providers, which process data on our behalf under their own privacy and security terms:

ProviderPurposeData involvedSupabaseAuthentication, cloud database, file storage, backend functionsEmail, hashed password, all synced invoice/estimate/client/business data, logo images, device tokensGoogle Firebase AnalyticsAnonymized product-usage analyticsAnonymized event and app-setting dataGoogle Firebase CrashlyticsCrash and error reportingCrash stack traces, device model, OS version, app versionGoogle Firebase Cloud MessagingPush notificationsDevice token, user IDGoogle Play BillingSubscription purchase and managementPurchase token and subscription status (card details handled by Google)StripeCard payments on your invoices (via your own connected Stripe account) and hosted checkout for your clientsYour Stripe account ID; invoice amount, number, and checkout URL. Your clients' card data is handled solely by Stripe.

Google's privacy policy: https://policies.google.com/privacy Stripe's privacy policy: https://stripe.com/privacy

• Your AQ Invoice subscription. Processed entirely by Google Play Billing. We do not collect, see, or store your card details, billing address, or payment credentials. We receive only your subscription status.
• Payments you collect from your clients. Processed by Stripe, into your own connected Stripe account. AQ Invoice is not a party to those transactions and does not hold or move the funds. Card data is entered on Stripe's hosted page and never passes through the App or our servers.

Your data is stored locally on your device and, if cloud sync is enabled, with our cloud infrastructure provider Supabase, on servers located in the European Union (Ireland). If you use the App from outside the European Union, your data is transferred to and stored there; where such a transfer requires a safeguard, it is made under Standard Contractual Clauses or an equivalent mechanism. Data is encrypted in transit (HTTPS/TLS), and access is restricted by row-level security so each account can only read its own data. No method of storage or transmission is completely secure, and we cannot guarantee absolute security.

We keep your account and synced data for as long as your account exists.

• In the App: Settings → Account → Delete Account permanently deletes your account, and all associated invoices, estimates, clients, items, business profiles, logo files, and your authentication record. This cannot be undone.
• By web request: if you no longer have the App installed, you can request deletion at https://aqzentrix.com/delete-account or by emailing info@aqzentrix.com from the address associated with your account. We complete verified requests within 30 days.
• Deleting specific data: you can delete individual invoices, estimates, clients, items, or business profiles at any time from within the App, without affecting your account.
• Locally stored data is removed when you uninstall the App.
• After deletion, we may retain anonymized, non-identifiable usage analytics and limited records needed for legal compliance or fraud prevention for up to 90 days, after which they are permanently erased. Residual copies in encrypted routine backups are overwritten within the same period.

AQ Invoice is a business tool and is not directed at children. We do not knowingly collect personal information from children under 16. If you believe a child has provided us information, contact us and we will delete it.

Depending on where you live (including the EEA, the UK, and certain US states), you may have the right to access, correct, delete, or export your personal data, to object to or restrict certain processing, and to withdraw consent. You can exercise most of these directly in the App (edit or delete your data, delete your account) or by contacting us. If you are in the EEA or UK, you also have the right to lodge a complaint with your local data protection authority.

Our lawful bases for processing (EEA/UK) are: performance of our contract with you (operating the App), your consent (analytics, notifications), and our legitimate interests (security, fraud prevention, product improvement).

We may update this Privacy Policy from time to time. Material changes will be posted on this page with a revised effective date and, where appropriate, notified in the App.

Questions about this Privacy Policy or your data: info@aqzentrix.com AQ Zentrix Ltd — a company registered in England & Wales, company number 16654132 — registered office: 10 Woodlands Grove, Leeds, LS16 8GH, United Kingdom