Subnet CIDR Pro
IPv4, CIDR & VLSM Calculator
About
This app is a fast and accurate IPv4 subnet calculator and visual planner for network professionals and students. It offers instant calculations, VLSM planning, and a comprehensive CIDR reference, all while operating offline with no ads or tracking.
What's New in Subnet CIDR Pro
1.0
October 1, 2026
Developer apps
FAQ
What is Subnet CIDR Pro?
Subnet CIDR Pro is a native iOS application designed for network engineers and IT professionals. It provides fast and accurate IPv4 subnet calculations, visual VLSM planning, and a comprehensive CIDR reference tool.
Does Subnet CIDR Pro have ads?
No, Subnet CIDR Pro is completely ad-free. The app is designed with a privacy-first approach and contains zero ads, zero tracking, and zero telemetry.
How much does Subnet CIDR Pro cost?
Subnet CIDR Pro is a one-time purchase. This unlocks lifetime access to all features without any subscriptions or in-app purchases.
Can I use Subnet CIDR Pro offline?
Yes, Subnet CIDR Pro is 100% offline and self-contained. All calculations run locally on your device, ensuring functionality without an internet connection.
What devices does Subnet CIDR Pro support?
Subnet CIDR Pro is currently supported on iPhone devices. It features a native dark mode UI optimized for various environments.
How often is Subnet CIDR Pro updated?
The app was last updated on October 1, 2026, with version 1.0. While specific update frequency isn't detailed, the developer is committed to providing a reliable tool.
What are the benefits of the visual VLSM planner in Subnet CIDR Pro?
The visual VLSM planner automatically allocates Variable Length Subnet Masks from any parent IPv4 block. It allows for custom subnet requirements, optimal sorting to prevent fragmentation, and instant detection of overflows or overlaps.
Is Subnet CIDR Pro suitable for beginners?
Yes, Subnet CIDR Pro is designed for IT students and professionals alike. Its clean interface, instant calculations, and clear binary visualization make complex subnetting concepts more accessible.