Terms of Service

Effective Date: August 26, 2026

Welcome to Subnetix - IP Calculator ("we", "us", "our"). These Terms of Service ("Terms") govern your access to and use of the Subnetix - IP Calculator mobile application (the "App") and related services (collectively, the "Services"). By downloading, installing, or using the Services, you agree to these Terms. If you disagree, do not use the Services.

Eligibility

You must be at least 16 years old and capable of forming a binding contract. Use is void where prohibited.

License

We grant you a limited, non-exclusive, non-transferable, revocable license to use the App for personal purposes on devices you own or control, subject to these Terms.

Permitted Use

Use the App to calculate IPv4 and IPv6 subnet parameters — network address, broadcast address, usable host range, subnet mask, wildcard mask, host counts, and related values — from an address and prefix length you enter.Use the App's tools to check whether an address falls within a given subnet and to convert between CIDR prefix notation and dotted-decimal subnet masks.Use the App to plan subnets, including equal-size splitting of a base network and variable-length subnet masking (VLSM) based on host requirements you specify.Use the App's learning features — the prefix reference sheet and the practice quiz — for study and self-assessment.Use the App to copy results to the clipboard, share them using the standard iOS share sheet, and save calculations to your on-device history.You may use the App for both personal and professional purposes, including network administration, engineering work, and exam preparation.Comply with all applicable laws.

• Use the App to calculate IPv4 and IPv6 subnet parameters — network address, broadcast address, usable host range, subnet mask, wildcard mask, host counts, and related values — from an address and prefix length you enter.
• Use the App's tools to check whether an address falls within a given subnet and to convert between CIDR prefix notation and dotted-decimal subnet masks.
• Use the App to plan subnets, including equal-size splitting of a base network and variable-length subnet masking (VLSM) based on host requirements you specify.
• Use the App's learning features — the prefix reference sheet and the practice quiz — for study and self-assessment.
• Use the App to copy results to the clipboard, share them using the standard iOS share sheet, and save calculations to your on-device history.
• You may use the App for both personal and professional purposes, including network administration, engineering work, and exam preparation.
• Comply with all applicable laws.

Prohibited Use

You agree not to:

Use the App in connection with unauthorized access to any network, system, or service.Engage in illegal activities in connection with your use of the App.Reverse engineer, decompile, modify, or create derivative works of the App.Redistribute, sublicense, or resell the App or any part of it.Attempt to circumvent any security features or usage limitations of the App.Present the App's learning content as an official certification, credential, or accredited training program.

• Use the App in connection with unauthorized access to any network, system, or service.