# OT First Aid: Troubleshooting — Fast Help for Industrial OT

> Fast Help for Industrial OT (iPhone/iPad app by Dominik Gausmann.)

- Source: https://appshunter.io/ios/app/ot-first-aid-troubleshooting/id6812860466 (this page in markdown: same URL + `.md`)
- Developer: [Dominik Gausmann](https://appshunter.io/developer/1870320985)
- Category: Productivity, Developer Tools
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: English, German
- Released: 2026-09-24
- Data updated: 2026-10-11

## What is OT First Aid?

OT First Aid helps technicians, maintenance teams, and automation engineers troubleshoot common faults in industrial systems. Structured immediate actions, checklists, possible causes, recommended tools, and escalation guidance make diagnostics faster and more consistent.

The app includes practical guides for PLCs, HMIs, PROFINET, fieldbus systems, drives, sensors, safety circuits, cameras, servers, databases, remote access, and industrial networks. All built-in guidance works offline and is designed for use directly at the machine.

Premium adds custom troubleshooting guides, plant profiles, contacts, maintenance notes, incident logs, photos, QR codes, PDF export, sharing, JSON backup and import, iCloud backup, and Face ID protection.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| OT First Aid Premium | $8.99 | one-time |


## Is OT First Aid safe?

Not enough ratings yet to assess OT First Aid.

## Is OT First Aid legit?

OT First Aid: Troubleshooting appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for OT First Aid is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.1 — 2026-10-09

New in version 1.1:

• Five new OT guides for DNS, DHCP, firewalls and ports, IO-Link, and Modbus TCP
• Smarter full-text search across actions, checklists, causes, and tools
• Support for technical search terms and synonyms such as PLC, VFD, and panel
• Saved checklist progress with a progress indicator and reset option
• Refined German and English wording
• Layout and stability improvements

### 1.0 — 2026-09-24

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)
- [OT Subnet Calculator](https://appshunter.io/ios/app/ot-subnet-calculator/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 2026-10-11.*