# iSubnet Calculator — Subnet Calculator & Tools

> Subnet Calculator & Tools (iPhone/iPad app by CHRISTOS PEIVANIS.)

- Source: https://appshunter.io/ios/app/isubnet-calculator/id6794944106 (this page in markdown: same URL + `.md`)
- Developer: [CHRISTOS PEIVANIS](https://appshunter.io/developer/6794944108)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 19 MB
- Languages: American English
- Released: 2026-09-14
- Data updated: 2026-10-09

## What is iSubnet Calculator?

iSubnet Calculator is the essential toolkit for network engineers, IT professionals, system administrators, and students. With a clean, modern interface, it handles all your IP addressing and subnetting work in real-time — no more manual binary math or juggling multiple tools.

Core Features:

IPv4 & IPv6 Subnetting — Calculate network addresses, broadcast addresses, usable host ranges, and wildcard masks instantly
Interactive CIDR Calculator — Drag and adjust CIDR sliders to see network size, total addresses, and host counts update live
Smart Paste & Parse — Paste any IP address format and the app instantly recognizes and fills it in
Unit Converter — Quickly convert between IP notations and formats
Number Base Converter — Convert instantly between binary, octal, decimal, and hexadecimal
Quick Reference — Built-in subnetting reference tables and cheat sheets
Available vs. Total Hosts — Precise breakdowns of usable addresses with standard offset calculations
Elegant, Adaptive Design — Beautiful UI optimized for light and dark mode, portrait and landscape

Upgrade to Pro for:

Subnet Splitter — Split networks using Equal or VLSM (Variable Length Subnet Masking) methods
Bulk Subnet Calculator — Process multiple subnets at once
Unlimited History & Notes — Keep a complete record of your work, without limits
Export Reports & CSV — Generate professional documentation and share your calculations instantly

iSubnet Pro is available as an auto-renewing monthly or yearly subscription, or a one-time Lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period, and can be managed anytime in your App Store account settings.

Whether you're studying for a networking certification, managing enterprise infrastructure, or just need a reliable subnet calculator on the go, iSubnet Calculator combines power and simplicity in one polished app.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| iSubnet PRO Monthly | $0.99 | per month |
| iSubnet PRO Yearly | $3.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| iSubnet Lifetime PRO | $8.99 | one-time |


## Is iSubnet Calculator safe?

Not enough ratings yet to assess iSubnet Calculator.

## Is iSubnet Calculator legit?

iSubnet Calculator has limited verification signals. The AppsHunter Legitimacy Score for iSubnet Calculator is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.2.0 — 2026-09-20

In this update, we’ve added powerful new export options and polished the core app experience:

• Bulk Export & Share: The Bulk IPv4 and Bulk IPv6 results now feature dedicated action buttons, allowing you to instantly Save to Notes, Share, or export as PDF/CSV. • Smarter Formatting: The Bulk IPv4 input field now automatically sanitizes and formats consecutive colons as you type to better support IPv6-mapped addresses. • Smoother Navigation: Fixed a subtle screen jump that could occasionally occur when using the keyboard's "Next" button to hop between different text fields. • Better Error Feedback: Submitting a bulk list of entirely invalid IP addresses will now correctly display error feedback rows rather than failing silently. • Assorted layout improvements and under-the-hood stability enhancements for a smoother experience.

### 1.1.17 — 2026-09-20

This massive update brings major expansions to the Free tier, sleeker native-feeling menus, and a huge wave of iOS-specific polish and stability improvements!

NEW FEATURES & ENHANCEMENTS
• Freemium Expansion: We’ve increased the Free tier limits! You can now save up to 3 notes and view up to 4 history items without upgrading.
• Improved Converter: Added new subtle watermarks for shared notes and reordered the Pro feature list to make exploring premium features easier.

UI & UX POLISH
• Sleeker Menus: We’ve completely overhauled the app's pop-ups and menus to feel smoother, more responsive, and perfectly matched to the app's native design.
• Smarter Keyboard: The iOS keyboard now properly pushes the app interface up instead of covering the bottom navigation bar, making it much easier to type and navigate.
• Tap-to-Dismiss: You can now tap anywhere outside of a text field to instantly dismiss the keyboard.
• Auto-Zoom Fix: Fixed an annoying issue where iOS would aggressively zoom in on the screen when tapping into a text box.
• Locked Viewport: Disabled accidental pinch-to-zoom across the app so the interface stays perfectly locked in place while you calculate.
• Full-Screen Splash: Fixed a layout issue that was preventing the splash screen from fully covering the edges of wider screens.

BUG FIXES & STABILITY
• Base Converter Fixes: Fixed an issue that caused the app to crash when tapping "Save" or "Share" on the Base Converter.
• Better Note Saving: The Base Converter "Save" button now correctly saves your calculations directly to your Notes tab.
• IPv6 Sharing: Fixed a bug that caused the app to crash when attempting to save or share IPv6 converter results.
• Smoother Purchasing: Fixed an error in the Pro upgrade flow that occasionally hid actual transaction errors (like declined cards) from displaying correctly.
• Account Preservation: Fixed an issue where temporary session expirations could accidentally log you out of your Pro subscription status.
• Under-the-Hood: Added deep stability monitoring, advanced crash-reporting breadcrumbs, and massive code cleanups to ensure the app runs faster and more reliably than ever.

### 1.1.16 — 2026-09-18

iSubnet 1.1.16 brings a major overhaul to the mobile typing experience alongside several UI polish updates:

• Enhanced Keyboard Layouts: Upgraded all IP address, CIDR, and VLSM input fields to use streamlined numeric keypads, saving you from constantly switching keyboards.
• Smart Separators: Added a smart comma-to-dot converter for international keyboards, and introduced dedicated comma/space insert buttons for rapid VLSM host entry.
• Zero Interference: Disabled auto-correct and auto-capitalize on all technical fields so the OS no longer interferes with your networking strings.
• UI Polish: Fixed visibility issues with the Subnet Splitter method selector and History tab cards for a cleaner look in both Light and Dark modes.

### 1.1.15 — 2026-09-17

In this update, we’ve added highly requested features and squashed a few bugs to make your network planning even smoother:

• Faster Data Entry: The app now automatically opens a numeric keypad for pure-digit fields, and the VLSM Splitter now accepts space-separated host sizes in addition to commas!
• Splitter Auto-Save: Generating a massive subnet split? When dividing networks into more than 128 subnets, the calculator will now automatically save the complete list (up to 20,000 subnets) directly to your Notes for easy exporting.
• Improved Settings Menu: The Settings panel is now fully scrollable, ensuring all options—and the close button—are perfectly accessible on smaller screens.
• IPv6 Paste Detection: Pasting an IPv6 address into the Subnet Splitter now instantly detects the format and switches the calculator to IPv6 mode.
• Minor UI bug fixes and under-the-hood stability improvements.

Thank you for using iSubnet! If you have any feedback or feature requests, you can reach us directly through the Settings menu.

### 1.1.13 — 2026-09-15

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-09.*