---
title: "FieldSim - Protocol Simulator - Bewertungen, Einnahmen und Downloads in Vereinigte Staaten | Apple App Store"
description: "Fieldsim turns your iPhone into a real industrial and IoT protocol test bench — no extra hardware, no lab PC, no separate test tools.  Fieldsim isn't a mock-up. Every protocol is implemented against i"
---

# FieldSim - Protocol Simulator — Vereinigte Staaten
> Industrial Protocol Simulator

![FieldSim App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/c1/e5/a9/c1e5a91f-1e14-51b2-974a-aac6d8672c0e/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [Alexandr Garlock Development House](https://apptail.io/de/developer/alexandr-garlock-development-house-FPpzuc)
**Category:** Developer Tools
**Rating:** N/A (0 ratings)
**Price:** $9.99
**Bundle ID:** com.alexgarlock.Fieldsim
**Store:** Apple App Store
**Country:** Vereinigte Staaten
**Version:** 1.0 (released 2026-10-14)
**Original Release:** 2026-10-14
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id6819095224)
**AppTail Page:** [https://apptail.io/de/app/fieldsim-protocol-simulator-xHED/united-states](https://apptail.io/de/app/fieldsim-protocol-simulator-xHED/united-states)

## FieldSim Description
Fieldsim turns your iPhone into a real industrial and IoT protocol test bench — no extra hardware, no lab PC, no separate test tools.

Fieldsim isn't a mock-up. Every protocol is implemented against its real wire-level specification and verified against industry-standard reference clients and libraries. Real SCADA software, PLCs, and IoT gateways can connect to your iPhone and talk to it exactly as they would to a real field device.

Simulate 11 real protocols:
• MQTT — full broker with multi-topic publish/subscribe
• OPC UA — session/subscription server with a real address space
• Modbus TCP — coils, discrete inputs, holding & input registers
• BACnet/IP — Who-Is/I-Am discovery, ReadProperty/WriteProperty
• DNP3 — link/transport/application layers, Class 0 polling, Direct Operate
• EtherNet/IP — CIP explicit messaging (Get/Set_Attribute_Single)
• SNMP v2c — GET/GETNEXT/SET plus trap notifications
• AMQP 0-9-1 — full exchange/queue/consumer message broker
• CoAP — RFC 7252 with the Observe extension for live push updates
• HART-IP — session-managed Pass-Through with Universal Commands
• LoRaWAN — a real Network Server speaking the Semtech UDP protocol, with AES-128/CMAC frame encryption and authentication

Every protocol, both directions. Each simulator supports multiple simultaneous tags, points, or objects — build out a small virtual plant, not just one sensor. And every protocol also has a matching built-in client on the Client tab, so you can test your simulator (or any other real device on your network) without installing a second app or opening a terminal.

Built for real testing, not demos:
• Live, scrollable activity logs for every simulator and client
• Save and reuse connection presets per protocol — host, port, credentials, and protocol-specific settings
• Automatic detection of your iPhone's network address, so external clients always know where to connect
• Configurable value patterns (random, sine wave, ramp, static) for realistic simulated data

Who it's for:
Automation and controls engineers validating SCADA/HMI integrations, QA teams testing IoT gateways and protocol converters, product developers building device firmware against real-world protocols, and students or instructors learning how industrial protocols actually work on the wire.

Fieldsim is iOS-native, built entirely on Apple's Network framework — fast, lightweight, and works over Wi-Fi with any device on the same network.

## FieldSim Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/89/88/e7/8988e705-96d6-0e63-b940-42608100b1b9/fieldsim-01.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/f0/86/95/f0869559-9497-2b20-538d-c1aa926652d0/fieldsim-05.png/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/94/85/28/9485280c-bfce-4d70-e5bb-835af7898305/fieldsim-03.png/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/ff/93/e0/ff93e0b2-f92f-ccf9-cda4-40399e10a24d/fieldsim-02.png/1242x2688.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/39/ea/20/39ea20b2-22b3-4383-5028-d6dbe5e3bf35/fieldsim-04.png/1242x2688.png)
- [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/fa/75/89/fa758961-0de1-efb7-1323-e06ecdd9d734/fieldsim-06.png/1242x2688.png)




## FieldSim Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Bezahlt | Vereinigte Staaten | Developer Tools | #42 |




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