# MONITORING & TIMER RELAY vs PLC Simulator 2, Ladder Logic

The clearest difference is update cadence: PLC Simulator 2, Ladder Logic at every 6 days against MONITORING & TIMER RELAY's every 4 months. MONITORING & TIMER RELAY's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MONITORING & TIMER RELAY ships an update every 4 months, PLC Simulator 2, Ladder Logic every 6 days. The most recent releases landed on October 25, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | MONITORING & TIMER RELAY | PLC Simulator 2, Ladder Logic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (121 ratings)](https://appshunter.io/ios/app/plc-simulator-2-ladder-logic/id1672572436/reviews)** |
| Number of ratings | — | **121** |
| Positive reviews | — | 84.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | — | Free |
| Size | 195 MB | 29 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Phoenix Contact GmbH & Co. KG](https://appshunter.io/developer/426916392) | [David White](https://appshunter.io/developer/911163945) |

## What reviewers say

### MONITORING & TIMER RELAY

[App page](https://appshunter.io/ios/app/monitoring-and-timer-relay/id1505993143)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### PLC Simulator 2, Ladder Logic

[App page](https://appshunter.io/ios/app/plc-simulator-2-ladder-logic/id1672572436)

This application enables students and professionals to test and explore basic PLC programming using ladder logic on their mobile devices. It supports various instructions, configurable rungs, and includes interactive animations for a hands-on learning experience. Save and modify up to 20 programs, with preloaded examples to aid understanding.

**Highlights:** Configurable rungs, Input/Output descriptions, Ladder logic simulation, Save up to 20 programs, Interactive animations, Preloaded example programs

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is MONITORING & TIMER RELAY free?

MONITORING & TIMER RELAY is free to download, with no in-app purchases.

### Is PLC Simulator 2, Ladder Logic free?

PLC Simulator 2, Ladder Logic is free to download, with no in-app purchases.

### Do MONITORING & TIMER RELAY or PLC Simulator 2, Ladder Logic have ads?

Neither MONITORING & TIMER RELAY nor PLC Simulator 2, Ladder Logic shows ads.

### Which is updated more often, MONITORING & TIMER RELAY or PLC Simulator 2, Ladder Logic?

MONITORING & TIMER RELAY ships an update every 4 months, and PLC Simulator 2, Ladder Logic every 6 days. Most recently, MONITORING & TIMER RELAY was updated on October 25, 2026 and PLC Simulator 2, Ladder Logic on October 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*