Privacy Policy

1. Overview

SimpleCalc: Scientific Calc ("we", "us", or "our") operates the SimpleCalc: Scientific Calc application and associated services (collectively, the "Service"). This Privacy Policy explains how we collect, use, and protect information about you when you use the Service.

By using the Service you agree to this policy. If you do not agree, please stop using the Service.

2. Data We Collect

Information you provide directly

• Account details (email address, display name) when you register or sign in
• Content and inputs you submit while using the Service, only as required to deliver the requested feature
• Payment information processed via our payment provider (we do not store raw card numbers)
• Support correspondence you send us

Information collected automatically

• Device identifiers (device model, OS version, app version)
• Usage data (features accessed, session duration, in-app events)
• Crash reports and performance diagnostics
• IP address and approximate location (country / region level only)

Information we do NOT collect

• Precise GPS location
• Contacts, photos, microphone, or camera data unless you explicitly grant permission for a feature that requires it
• Sensitive personal data unless strictly required and clearly disclosed at the point of collection

3. How We Use Your Data

• Provide, operate, secure, and improve the Service
• Remember your preferences and settings across sessions
• Process payments and manage subscriptions
• Send transactional messages (receipts, OTP codes, critical service updates)
• Diagnose bugs and monitor service performance
• Detect and prevent fraud, abuse, and security incidents
• Comply with legal obligations

We do not use your personal data for behavioural advertising, and we do not sell it to third parties. If we send optional marketing messages, you will be able to unsubscribe at any time.

4. Third-Party Services

We rely on the following categories of third-party providers. Each operates under its own privacy policy.

• Cloud hosting — Amazon Web Services (Sydney region, ap-southeast-2)
• Authentication — Apple Sign In, Google Sign In (sign-in only)
• Payments — Apple App Store, Google Play (in-app purchases)
• Email delivery — Amazon SES (transactional email only)
• Analytics & crash reporting — Firebase (anonymised / aggregated usage metrics)

We do not embed social-media tracking pixels or third-party advertising SDKs.

5. Data Storage & Security

Your account data is stored on servers located in Sydney, Australia (AWS ap-southeast-2). We use industry-standard measures including TLS encryption in transit, encryption at rest, and access controls restricted to authorised personnel.

No method of transmission over the internet is 100% secure. While we strive to protect your data, we cannot guarantee absolute security.

6. Data Retention

• Active account data is retained for as long as your account exists.
• After account deletion, personal data is purged within 90 days, except where retention is required by law.
• Anonymised, aggregated analytics data may be retained indefinitely.
• Payment transaction records are kept for 7 years for tax and accounting compliance.

You can request deletion of your account and data at any time by contacting us at the address below.

7. Your Rights

Depending on your jurisdiction, you may have the right to:

• Access — request a copy of the personal data we hold about you
• Correction — request that inaccurate data be corrected
• Deletion — request erasure of your personal data ("right to be forgotten")
• Portability — receive your data in a machine-readable format
• Objection — object to processing based on legitimate interests
• Withdrawal of consent — where processing is based on consent, withdraw it at any time

If you are in Australia, your privacy rights are protected under the Privacy Act 1988 (Cth) and the Australian Privacy Principles. If you are in New Zealand, they are protected under the Privacy Act 2020. If you are in the EU/UK, the GDPR / UK GDPR may apply.

To exercise any of these rights, contact us at nz.jiangzq@gmail.com. We will respond within 30 days.

8. Children's Privacy

The Service is not directed to children under the age of 13 (or the applicable minimum age in your jurisdiction). We do not knowingly collect personal data from children. If you believe we have inadvertently collected such data, please contact us immediately and we will delete it.

9. Changes to This Policy

We may update this policy from time to time. Material changes will be notified via in-app notice or email at least 14 days before they take effect. Continued use of the Service after the effective date constitutes acceptance of the updated policy.

The current version of this policy is always available at https://taxlite.net/simple_calc/privacy.html.

10. Contact Us