# OT Subnet Calculator — Subnet Calculator & IPAM

> Subnet Calculator & IPAM (iPhone/iPad app by Dominik Gausmann.)

- Source: https://appshunter.io/ios/app/ot-subnet-calculator/id6758581610 (this page in markdown: same URL + `.md`)
- Developer: [Dominik Gausmann](https://appshunter.io/developer/1870320985)
- Category: Utilities, Developer Tools
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.2 · 7 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Polish, Brazilian Portuguese, European Spanish
- Released: 2026-05-14
- Data updated: 2026-10-05
- User reviews in markdown: https://appshunter.io/ios/app/ot-subnet-calculator/id6758581610/reviews.md

## What is OT Subnet Calculator?

IP Subnet Calculator combines fast IPv4 calculations with professional network planning and a compact IPAM. Calculate network addresses, broadcasts, host ranges, subnet masks, and CIDR prefixes—or document complete sites, customers, and devices.

FAST AND ACCURATE
• Enter an IPv4 address or CIDR directly
• Network, broadcast, first and last host
• Usable host count and address classification
• Quick selection for common prefixes
• Copy and export results

IPAM FOR YOUR NETWORKS
• Folders and subfolders for sites, customers, or projects
• Networks with CIDR, VLAN, location, status, and notes
• Devices with hostname, IP, and MAC address
• Complete CSV export
• iCloud sync across your devices
• Share your IPAM and collaborate with others

PRO TOOLS
• Overlap checks for conflicting networks
• VLSM and VLAN planning
• CIDR aggregation
• IPv6 explorer and prefix comparison
• Favorites, history, and folders

LEARN AND UNDERSTAND
Bit visualization, step-by-step guides, practical scenarios, interactive examples, a quiz, and a cheatsheet help both beginners and network professionals.

Core calculators are free. IPAM, collaboration, and advanced tools are available permanently with Pro—no subscription.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| IP Calc Profi Features | $0.99 | one-time |



## Version history (last 5 releases)

### 4.0 — 2026-09-20

Version 4.0 turns the subnet calculator into a complete networking toolkit: a new IPAM with folders, networks, devices, hostnames, CSV export, iCloud sync, and collaboration. It also adds VLSM and VLAN planning, CIDR aggregation, an IPv6 explorer, overlap checks, prefix comparison, favorites, history, and a redesigned learning area. The interface, calculators, navigation, and Pro experience have been substantially improved.

### 3.1 — 2026-06-21

-bugfixes

### 3.0 — 2026-05-17

Viele neue features. Neue Profi Tools.

### 2.0 — 2026-02-23

Die App wurde um einige Features erweitert. 

-Anleitung der APP
-Erscheinungsbild einstellbar
-Neue Funktion Netzwerk Overall Check
-Subnet Quiz
-Interaktive Beispiele
-Subnetze einfach erklärt
-direkte Kontaktmöglichkeit per WhatsApp oder Mail eingebaut

### 1.0 — 2026-02-04

No release notes.

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## More apps by Dominik Gausmann

- [Würfly - Dice Score Sheet](https://appshunter.io/ios/app/wurfly-dice-score-sheet/id6758018932)
- [Expiry - Expiration dates](https://appshunter.io/ios/app/expiry-expiration-dates/id6758586095)
- [MatchMoments](https://appshunter.io/ios/app/matchmoments/id6770105481)
- [Tap the Circle](https://appshunter.io/ios/app/tap-the-circle/id6770306077)
- [GolfTrackly](https://appshunter.io/ios/app/golftrackly/id6771446446)

All apps by Dominik Gausmann: https://appshunter.io/developer/1870320985

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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 2026-10-05.*