Introduction
maDNSer ("the App", "we", "our") is a macOS application for managing Dynamic DNS (DDNS) records. This Privacy Policy explains what information the App accesses, how it is used, and — crucially — what never leaves your device.
We built maDNSer with a privacy-first design. There are no user accounts, no registration requirements, and no telemetry of any kind.
Information We Do Not Collect
maDNSer never collects, stores remotely, or transmits any of the following:
Data Stored Locally on Your Mac
The App stores the following data exclusively on your device. It is never transmitted to us.
| Storage | What is stored | Purpose |
|---|---|---|
| Keychain | DDNS provider API keys and credentials you configure | Authenticate with your DDNS provider on your behalf |
| UserDefaults | App preferences (update intervals, provider settings, UI state) | Persist your configuration between launches |
macOS Keychain storage is encrypted and sandboxed. Only maDNSer can read the credentials it writes. You can review or delete all stored data at any time by removing the App and clearing its Keychain entries via Keychain Access.
Network Requests
maDNSer makes outbound network requests only for its core DNS-update function. It contacts exactly two categories of external services:
| Destination | Data sent | Why |
|---|---|---|
| Your DDNS providers | Your current public IP address + your API credentials | Update your DNS records as configured |
| ipify.org | No data — a plain GET request | Determine your current public IP address |
Please review the privacy policies of your chosen DDNS providers and ipify.org independently, as we have no control over how they handle incoming requests.
Subscriptions & Payments
maDNSer offers optional in-app subscriptions managed entirely through Apple StoreKit and the Mac App Store.
We receive only an anonymous StoreKit receipt that confirms whether a subscription is active. We cannot see your name, payment method, Apple ID, or any other billing information. All financial data is governed by Apple's Privacy Policy.
Third-Party SDKs & Analytics
maDNSer contains no third-party SDKs, advertising frameworks, analytics libraries, or crash-reporting services.
Apple may collect aggregate, anonymized App Store analytics (downloads, crashes) if you have opted in to sharing with developers in your macOS settings. We have no control over this data and it is covered by Apple's own privacy policy.
Children's Privacy
maDNSer does not knowingly collect any information from anyone, including children under the age of 13. Because we collect no data whatsoever, the App poses no heightened risk to minors.
Data Retention & Deletion
All data associated with maDNSer lives exclusively on your Mac. To delete it completely:
1. Uninstall maDNSer from your Applications folder.
2. Open Keychain Access and search for maDNSer to remove any stored credentials.
3. Delete ~/Library/Preferences/ entries for maDNSer if desired.
After these steps, no data related to the App remains on your system, and no data ever existed on our servers.
Changes to This Policy
If we make material changes to this Privacy Policy, we will update the effective date at the top of this page and, where appropriate, provide notice within the App. Continued use of the App after changes are posted constitutes your acceptance of the revised policy.
Given maDNSer's architecture — no accounts, no remote data — meaningful privacy changes are unlikely, but we commit to transparency if they occur.
Contact
Questions about this policy? Either open a public issue at the maDNSer feedback repo or for private/sensitive inquiries email:
