# OT Checker — Local network diagnostics

> Local network diagnostics (iPhone/iPad app by Dominik Gausmann.)

- Source: https://appshunter.io/ios/app/ot-checker/id6810327165 (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 15.0 · 29 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, European Spanish
- Released: 2026-09-14
- Data updated: 2026-09-25
- User reviews in markdown: https://appshunter.io/ios/app/ot-checker/id6810327165/reviews.md

## What is OT Checker?

OT Checker helps technicians inspect user-specified local IP addresses and private network ranges. Check common OT and industrial TCP services, identify active hosts, select ports, save targets and project profiles, compare scans, add device notes, and export compact reports.\n\nScans start only when requested and are intended for networks you own or maintain. Device names are shown when available. Premium unlocks custom port sets, project profiles, comparisons, notes, and export functions.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| OT Port Checker Premium | $3.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-09-20

New in this version:\n• Save, name, pin and archive scans by project and target range\n• Estimated device type and manufacturer detection for Premium\n• Improved scan comparisons with new or missing hosts and changed ports\n• Resume interrupted scans without checking completed hosts again\n• Enhanced PDF reports with company details, logo, cover page and sorting\n• More useful host details, notes and direct web interface access\n• IPv6 single-address checks and a compact safety onboarding

### 1.0.1 — 2026-09-16

-bugfixes Sprache

### 1.0 — 2026-09-14

No release notes.

## More apps by Dominik Gausmann

- [Würfly - Dice Score Sheet](https://appshunter.io/ios/app/wurfly-dice-score-sheet/id6758018932)
- [IP Subnet Rechner](https://appshunter.io/ios/app/ip-subnet-rechner/id6758581610)
- [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 2026-09-25.*